640 878
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640-878
Cisco
Building Cisco Service Provider Next-Generation Networks, Part 2
http://www.twpass.com/twpass.com/exam.aspx?eCode= 640-878
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640-878
QUESTION: 1
Which spanning-tree mode can be used to map several VLANs to a single spanning-tree
instance?
A. MST
B. PVST+
C. PVRST+
D. RSTP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=1
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QUESTION: 2
Which spanning-tree mode uses the name command to configure a region name?
A. MST
B. PVST+
C. PVRST+
D. RSTP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=2
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QUESTION: 3
Which procedure is used as the last resort disaster recovery procedure to completely replace the
currently installed IOS XR software on Cisco IOS XR routers?
A. netboot
B. turboboot
C. install recovery
D. install rollback
E. install add and install activate
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=3
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QUESTION: 4
Which file extension indicates a bootable installation file in Cisco IOS XR software?
A. .bin
B. .tar
C. .smu
D. .pie
E. .vm
F. .mini
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=4
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QUESTION: 5
When configuring an ACL entry, which network and wildcard mask matches only IP addresses
10.8.144.0 to 10.8.151.255?
A. 10.8.144.0 0.0.3.255
B. 10.8.144.0 0.0.7.255
C. 10.8.144.0 0.0.15.255
D. 10.8.144.0 0.0.252.255
E. 10.8.144.0 0.0.248.255
F. 10.8.144.0 0.0.240.255
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=5
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QUESTION: 6
Which IP addresses are matched by the permit 192.168.80.64 0.0.0.15 access-list entry?
A. 192.168.80.64 to 192.168.80.255
B. 192.168.80.64 to 192.168.80.96
C. 192.168.80.64 to 192.168.80.95
D. 192.168.80.64 to 192.168.80.80
E. 192.168.80.64 to 192.168.80.79
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=6
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QUESTION: 7
Which two statements about NAT444 are true? (Choose two.)
A. NAT444 packets are translated three times.
B. NAT packets traverse three IPv4 addressing domains.
C. NAT444 needs to work together with DNS64.
D. There are two types of NAT444 (stateful or stateless).
E. NAT is performed by the CPE and also by the service provider router.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=7
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QUESTION: 8
Refer to the exhibit. cisco&c=640-878&q=1 The access list has been configured on the
Gi0/0/0/0 interface in the inbound direction. Which four packets that are sourced from 10.1.1.1
TCP port 1060, if they are routed to the Gi0/0/0/0 interface, will be permitted? (Choose four)
A. destination IP address: 192.168.15.37, destination TCP port: 8080
B. destination IP address: 192.168.15.41, destination TCP port: 8080
C. destination IP address: 192.168.15.49, destination TCP port: 8080
D. destination IP address: 192.168.15.36, destination TCP port: 80
E. destination IP address: 192.168.15.46, destination TCP port: 80
F. destination IP address: 192.168.15.49, destination TCP port: 80
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=8
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QUESTION: 9
Which two statements about NAT64 are true? (Choose two.)
A. NAT64 packets traverse two IPv4 addressing domains.
B. NAT64 packets are translated two times.
C. There are two types of NAT64 (stateful or stateless).
D. NAT is performed by the CPE and also by the service provider edge router.
E. The DNS64 server embeds the IPv4 address from the DNS A record with a
preconfigured IPv6 translation prefix.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=9
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QUESTION: 10
Refer to the exhibit. The access list has been configured on the Gi0/0/0/0 interface in the
inbound direction. Which two packets that are sourced from 172.16.1.1 TCP port 1050, if they
are routed to the Gi0/0/0/0 interface, will be permitted? (Choose two)
A. destination IP address: 10.10.192.201, destination TCP port: 80
B. destination IP address: 10.10.193.255, destination TCP port: 80
C. destination IP address: 10.10.196.1, destination TCP port: 80
D. destination IP address: 10.10.195.254, destination TCP port: 23
E. destination IP address: 10.10.193.145, destination TCP port: 23
F. destination IP address:10.10.197.32, destination TCP port: 23
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=10
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QUESTION: 11
Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual
MAC address to the active virtual forwarders?
A. HSRP
B. VRRP
C. GLBP
D. FHRP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=11
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QUESTION: 12
Which two statements about the BGP weight attribute on Cisco routers are true? (Choose two.)
A. It is a well-known discretionary attribute.
B. It is only locally significant.
C. Routes with higher weight are the preferred routes.
D. It is used to influence the inbound traffic from the upstream AS.
E. It is set to 100 by default.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=12
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QUESTION: 13
Which BGP attribute is also used for loop prevention?
A. weight
B. local preference
C. MED
D. AS path
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=13
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QUESTION: 14
The permit 172.16.32.0 0.0.15.255 access-list entry permits exactly which IP address range?
A. 172.16.32.0 to 172.16.47.255
B. 172.16.32.0 to 172.16.48.255
C. 172.16.32.0 to 172.16.62.255
D. 172.16.32.0 to 172.16.63.255
E. 172.16.32.0 to 172.16.64.255
F. 172.16.32.0 to 172.16.255.255
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=14
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QUESTION: 15
On the Cisco ME 3400 switch, spanning tree is enabled by default on which type of switch
port?
A. UNI
B. ENI
C. NNI
D. ENI and NNI
E. UNI, ENI, and NNI
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=15
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QUESTION: 16
Refer to the two show output examples below. The switch with the e8ba.70b5.7180 MAC
address is the root bridge for which VLAN or VLANs? cisco&c=640-878&q=1 <br> <img
src="http://www.TwPass.com/Exams/images/Cisco/640-878_MaskImg_1(4).png" />
A. VLAN 1
B. VLAN 70
C. VLAN 80
D. VLANs 1, 70, and 80
E. VLANs 1 and 70
F. VLANs 1 and 80
G. VLANs 70 and 80
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=16
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QUESTION: 17
Refer to the Cisco IOS XR commands exhibit. cisco&c=640-878&q=1 The router
administrator is trying to activate a software package on the router but is not able to do so.
Which statement about this problem is true?
A. The router needs to be in the global configuration mode.
B. The router needs to be in the admin global configuration mode.
C. The router needs to be in the admin EXEC mode.
D. The install activate command is not the correct command to use.
E. The administrator needs to log in as the "root" user instead of the "admin" user.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=17
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QUESTION: 18
During the BGP route selection process on Cisco routers, which BGP attribute is examined
first, to determine the best path to use?
A. AS path
B. MED
C. local preference
D. weight
E. origin
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=18
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QUESTION: 19
Which type of service provider is responsible for offering backbone connectivity services to
other service providers?
A. CSP
B. TSP
C. NSP
D. ISP
E. ASP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=19
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QUESTION: 20
Cisco IP NGN service providers can offer multiple services to their customers by using which
type of technology in their core networks?
A. ATM
B. SONET/SDH
C. Frame Relay
D. IP/MPLS
E. PBB
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=20
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QUESTION: 21
ISPs use which protocol to establish peering sessions in an Internet exchange point
environment?
A. LDP
B. IS-IS
C. BGP
D. OSPF
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=21
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QUESTION: 22
You are enabling OSPF on a router and notice that all the Fast Ethernet and the Gigabit
Ethernet interfaces have the same OSPF cost of 1. Which single configuration change can you
make in router ospf configuration mode so that the Fast Ethernet interfaces have a higher
OSPF cost than the Gigabit Ethernet interfaces?
A. Change the OSPF interface cost globally.
B. Change the OSPF default metric.
C. Change the OSPF auto-cost reference bandwidth.
D. Change the OSPF administrative distance.
E. Change the OSPF metric type from E2 to E1.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=22
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QUESTION: 23
On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0
interface that has an IPv4 IP address of 192.168.1.1/24?
A. router ospf 1 network 192.168.1.1 0.0.0.0 area 0
B. router ospf 1 network 192.168.1.1 255.255.255.255 area 0
C. router ospf 1 area 0 interface gi0/0/0/0
D. router ospfv3 1 network 192.168.1.1 0.0.0.0 area 0
E. router ospfv3 1 network 192.168.1.1 255.255.255.255 area 0
F. router ospfv3 1 area 0 network 192.168.1.0
G. router ospfv3 1 area 0 interface gi0/0/0/0
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=23
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QUESTION: 24
Which three statements about OSPFv2 or OSPFv3 authentication are true? (Choose three.)
A. On Cisco IOS XR platforms, OSPFv3 authentication can be configured at the OSPF
routing process, area, or interface level.
B. OSPF authentication on Cisco IOS and IOS XE platforms can be configured per area
or per interface.
C. On Cisco IOS and IOS XE and IOS XR platforms, the authentication key can only
be configured per interface.
D. OSPFv3 uses IPsec for authentication and encryption.
E. On Cisco IOS XR platforms, the OSPF authentication that is configured for the area
overrides the authentication that is configured for the interface.
F. On Cisco IOS and IOS XE platforms, the two OSPFv2 authentication methods that
are supported are MD5 and SHA1.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=24
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QUESTION: 25
Which statement is true about enabling IS-IS routing and using the net command to configure
the NSAP address?
A. NSAP addresses have a fixed size of 20 bytes.
B. The NSEL must always be 00 to identify the router.
C. The area address follows the system ID field before the NSEL field.
D. An AFI of 39 indicates that the AFI is a locally administered private address.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=25
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QUESTION: 26
You have just enabled IS-IS on the lab testing network. You notice that IS-IS is not using the
optimal path selection based on the interface bandwidth. Currently, the IS-IS routing process
seems to be selecting the best path based on the hop count. What configuration change can you
make to cause IS-IS to select the optimal path based on the interface bandwidth?
A. Enable a wide-style IS-IS metric.
B. Enable a narrow-style IS-IS metric.
C. Change the default auto-cost reference bandwidth to a higher value.
D. Change the default IS-IS metric on each of the router interfaces to better correspond
to the interface bandwidth.
E. Change the interface bandwidth by using the bandwidth interface configuration mode
command.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=26
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QUESTION: 27
You have installed a new router and configured OSPF on it. However, this new router is not
able to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four
conditions could cause this problem? (Choose four.)
A. mismatched OSPF hello/dead interval between the new router and the neighbor
router
B. mismatched OSPF area ID between the new router and the neighbor router
C. mismatched OSPF authentication data between the new router and the neighbor
router
D. mismatched OSPF router ID between the new router and the neighbor router
E. mismatched interface MTU between the new router and the neighbor router
F. mismatched interface bandwidth between the new router and the neighbor router
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=27
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QUESTION: 28
Refer to the Cisco IOS XR configuration exhibit. cisco&c=640-878&q=1 Which statement
about the configuration is true?
A. This is a Level-2-only router.
B. This is a Level-1-only router.
C. The maximum IS-IS path metric is 63.
D. This router belongs to area ID 0001.
E. This configuration is missing the net configuration for the IPv6 unicast address
family.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=28
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QUESTION: 29
Which statement about the benefits of MPLS PHP is true?
A. PHP is implemented to increase the performance on the egress edge LSR. PHP
allows the egress edge LSR to perform only one lookup to route the IP packet based on
destination IP address and routing table.
B. PHP is implemented to increase the performance on the egress edge LSR. PHP
enables the egress edge LSR to perform only one lookup based on the ingress label.
C. PHP is implemented to increase the performance on the egress edge LSR. PHP
enables the egress edge LSR to perform two lookups, first lookup based on the ingress
label and a second route lookup based on the destination IP address.
D. PHP is implemented to increase the performance on the LSR (P routers). PHP
enables the LSR (P routers) to perform only one lookup based on the ingress label.
E. PHP is implemented to increase the performance on the LSR (P routers). PHP
enables the LSR (P routers) to perform only one route lookup based on the destination
IP address.
F. PHP is implemented to increase the performance on the LSR (P routers). PHP
enables the LSR (P routers) to perform two lookups, first lookup based on the ingress
label and a second route lookup based on the destination IP address.
G. PHP is implemented to increase the performance on the ingress edge LSR. PHP
enables the ingress edge LSR to perform only one lookup based on the ingress label.
H. PHP is implemented to increase the performance on the ingress edge LSR. PHP
enables the ingress edge LSR to perform two lookups, first lookup based on the ingress
label and a second route lookup based on the destination IP address.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=29
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QUESTION: 30
Refer to the exhibit. cisco&c=640-878&q=1 Which three statements about MPLS LDP
operations are true?
A. The incoming label for 10.2.10.1/32 is 16010 (which is allocated by the local router),
and the outgoing label is 22 (as advertised by the next-hop router).
B. The 16003 and 16010 labels are learned from the 192.168.112.40 LDP neighbor.
C. The ImpNull outgoing label for the 192.168.102.0/24 network means that the
outgoing label should be removed when sending packets to the 192.168.112.40 nexthop router, when the incoming label is 16003.
D. The ImpNull outgoing label for the 192.168.102.0/24 network means that the local
router has not received a label for that network from its neighbor.
E. The Unlabeled outgoing label for 10.10.10.100/32 indicates that a label pop is
required when sending packets to the 10.10.10.1 next-hop router.
F. The outgoing label of 22 for 10.2.10.1/32 is learned from the 192.168.112.40 LDP
neighbor.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=30
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QUESTION: 31
On Cisco IOS XR software, how is LDP enabled on an interface?
A. LDP is automatically enabled globally on all interfaces, when ip cef is enabled
globally.
B. LDP is enabled on each interface, using the mpls ip interface configuration
command.
C. LDP is enabled on each interface, using the interface command under mpls ldp
(MPLS LDP configuration mode).
D. LDP is enabled globally on all interfaces, using the mpls ldp global configuration
command.
E. LDP is enabled globally on all interfaces, using the mpls ip global configuration
command.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=31
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QUESTION: 32
Which four statements about REP configurations on a Cisco ME 3400 switch port are true?
(Choose four.)
A. The port must be an NNI type and must be in trunk mode.
B. Use the rep segment number command to enable REP on the switch port.
C. A REP segment cannot be wrapped into a ring topology. REP supports only a
topology where each REP segment has two exit points via two edge switches.
D. The port where the segment terminates is called the edge port.
E. With REP, at least one port is always blocked in any given segment-that is, the
alternate port.
F. If a failure occurs within the segment, the blocked port goes to the forwarding state
after it goes through the listening state and the learning state.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=32
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QUESTION: 33
A VLAN is a logical grouping of switch ports that belong to which two of these? (Choose two.)
A. the same virtual switch cluster
B. the same IP subnet
C. the same collision domain
D. the same broadcast domain
E. the same virtual routing and forwarding instance
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=33
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QUESTION: 34
Refer to the exhibit. cisco&c=640-878&q=1 Which statement is true?
A. VLAN 1 traffic is sent untagged on the fa0/11 trunk port.
B. All VLANs traffic, including the native VLAN traffic, is tagged with a VLAN ID
when it is sent over the fa0/11 trunk port.
C. The switchport trunk allowed vlan command is not configured; therefore, no VLANs
are allowed on the trunk.
D. The encapsulation type that is used is 802.1ad.
E. The switchport trunk native vlan command is not configured; therefore, the trunk is
not operational.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=34
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QUESTION: 35
Refer to the partial configurations exhibit. cisco&c=640-878&q=1 What additional
configurations are required to enable inter-VLAN routing for VLANs 10 and 20 on the Cisco
ME 3400 switch using the metro IP access image?
A. interface Fa0/1 ip address 192.168.10.1 255.255.255.0 ! interface Fa0/2 ip address
192.168.20.1 255.255.255.0 !
B. interface Fa0/1 ip address 192.168.10.1 255.255.255.0 ! interface Fa0/2 ip address
192.168.20.1 255.255.255.0 ! router eigrp 1 network 192.168.10.0 network
192.168.20.0 !
C. interface vlan 10 ip address 192.168.10.1 255.255.255.0 ! interface vlan 20 ip
address 192.168.20.1 255.255.255.0 !
D. interface Fa0/1 encapsulation dot1q 10 ip address 192.168.10.1 255.255.255.0 !
interface Fa0/2 encapsulation dot1q 20 ip address 192.168.20.1 255.255.255.0 !
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=35
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QUESTION: 36
Refer to the topology diagram in the exhibit. cisco&c=640-878&q=1 Which two interface
configuration commands on the Cisco ME 3400-1 switch Fa 0/1 interface are required to
support the VLANs for Customer A to be trunked across the service provider network?
(Choose two.)
A. switchport access vlan 30
B. switchport mode trunk
C. switchport mode dot1q-tunnel
D. switchport trunk allowed vlan 1-100
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=36
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QUESTION: 37
Which IPv6 address block is reserved for 6to4 tunneling?
A. 2000::/16
B. 2001::/16
C. 2002::/16
D. 3ffe::/16
E. fe80::/16
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=37
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QUESTION: 38
When upgrading a Cisco ASR 1001 Router, when is the request platform software package
expand file bootflash:image-name command required?
A. to copy the consolidated Cisco IOS XE image to the bootflash:
B. to perform Cisco IOS ISSU on the standby route processor
C. to run the router using a consolidated package
D. to run the router using individual subpackages
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=38
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QUESTION: 39
Which Cisco router platform supports running either the Cisco IOS or IOS XR operating
system?
A. Cisco CRS
B. Cisco ASR9k
C. Cisco ASR1K
D. Cisco ISR-G2
E. Cisco 12000 GSR
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=39
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QUESTION: 40
You want to configure HSRP between a Cisco IOS and a Cisco IOS XR router for the
192.0.2.0/24 subnet. Half of the PCs on the 192.0.2.0/24 subnet are configured to use 192.0.2.1
as the default gateway, and the other half of the PCs are configured to use 192.0.2.254 as the
default gateway. The intent is to load balance the traffic across both routers. Which two IOS
and IOS XR configurations are needed? (Choose two.)
A. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0
router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 95
hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 105 hsrp 2 preempt
B. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.1 255.255.255.0
router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 99
hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 101 hsrp 2 preempt
C. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0
router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 1 hsrp
1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 1 hsrp 2 preempt
D. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip
192.0.2.1 standby 1 priority 105 standby 1 preempt standby 2 ip 192.0.2.254 standby 2
priority 95 standby 2 preempt
E. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.254 255.255.255.0 standby 1
ip 192.0.2.1 standby 1 preempt standby 2 ip 192.0.2.254 standby 2 preempt
F. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip
192.0.2.1 standby 1 preempt standby 1 priority 2 standby 2 ip 192.0.2.254 standby 2
preempt standby 2 priority 2
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=40
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QUESTION: 41
On Cisco IOS XR software, which two of the address-family command options in IS-IS
configuration mode are valid? (Choose two)
A. address-family clns
B. address-family ipv4 unicast
C. address-family ipv6 unicast
D. address-family vpnv4
E. address-family vpnv6
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=41
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QUESTION: 42
On Cisco routers, the address-family configuration command in BGP configuration mode is
used to enable which BGP feature?
A. BGP route policy
B. multiprotocol BGP
C. BGP policy accounting
D. BGP communities
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=42
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QUESTION: 43
Your switch network has been configured to support multiple VLANs. In order for the users on
one VLAN to communicate with users on another VLAN, which additional configuration is
required?
A. Enable a routing protocol like EIGRP on a routeror on a Layer 3 capable switch
B. Enable inter-VLAN routing on a routeror on a Layer 3 capable switch
C. Enable a switch virtual interface on the router, using the interface vlan global
configuration command
D. Enable a switch virtual interface on the switch, using the encapsulation dot1q
E. subinterface configuration command
F. EnableIP routing on a Layer 2 switch
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=43
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QUESTION: 44
Within an MPLS domain, which table is used by the label switch routers to make forwarding
decisions when a labeled packet is received?
A. FIB
B. RIB
C. LFIB
D. LIB
E. CEF
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=44
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QUESTION: 45
On Cisco IOS XR software, what is the default commit option?
A. best-effort
B. psuedo-atomic
C. replace
D. force
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=45
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QUESTION: 46
Refer to the show command exhibit. cisco&c=640-878&q=1 Which statement is true?
A. It shows the result of the target configuration merged with the running configuration.
B. It shows the contents of the uncommitted configuration.
C. It shows the contents of the failed configuration.
D. It shows the contents of the running configuration.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=46
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QUESTION: 47
When configuring a new VLAN on Cisco IOS switches, which configuration parameter is
required?
A. VLAN name
B. native VLAN ID
C. VLAN ID
D. VLAN map
E. VLAN MTU
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=47
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QUESTION: 48
What is a requirement for performing Cisco IOS ISSU on the Cisco IOS XE-based ASR 1006
and ASR 1013 routers?
A. must use consolidated package mode
B. must use subpackage mode
C. must have redundant RPs
D. must have owner and nonowner SDRs
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=48
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QUESTION: 49
Refer to the partial Cisco IOS router configuration exhibit. cisco&c=640-878&q=1 Which
statement is true?
A. To support the subinterface configuration, the Fa0/0 main interface configuration is
missing the encapsulation dot1Q command.
B. The Fa0/0 interface/subinterfaces are configured correctly to operate as a trunk port
to provide inter-VLAN routing for three VLANs (VLANs 1, 2, and 3).
C. To provide inter-VLAN routing, the Fa0/0.1, Fa0/0.2 and Fa0/0.3 subinterface
configuration is missing the encapsulation dot1Q vlan-id subinterface configuration
command.
D. To provide inter-VLAN routing, the router is missing the vlan 1, vlan 2, and vlan 3
global configuration commands.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=49
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QUESTION: 50
Refer to the partial Cisco IOS XR BGP configuration exhibit. cisco&c=640-878&q=1 Which
two statements are true? (Choose two)
A. This router uses its Loopback 0 interface IP address when establishing BGP peering
with the 10.2.1.1 router.
B. This router uses its Loopback 0 interface IP address when establishing BGP peering
with the 192.168.101.11 router.
C. Test1 refers to a route policy that is defined using the RPL.
D. Both the IBGP and EBGP sessions will be authenticated.
E. The IBGP session is missing the mandatory route-policy configuration.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=50
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QUESTION: 51
When is a route-policy configuration needed on a Cisco IOS XR router using RPL?
A. when enabling an IGP routing protocol configuration
B. when enabling an EBGP peering configuration
C. when enabling an IBGP peering configuration
D. when enabling route redistribution
E. when enabling an LDP peering configuration
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=51
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QUESTION: 52
Refer to the partial Cisco IOS router configuration exhibit. cisco&c=640-878&q=1 Which
type of tunnel configuration is shown?
A. GRE tunnel
B. manual 6in4 tunnel
C. 6to4 automatic tunnel
D. 6RD
E. IPv4-in-IPv6 tunnel
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=52
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QUESTION: 53
Which two protocols are most often deployed in Cisco IP NGN multiservices core networks to
support services like VPNs? (Choose two.)
A. MPLS
B. GRE
C. mGRE
D. SSL
E. VTI
F. multiprotocol BGP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=53
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QUESTION: 54
Which segment protocol provides fast and predictable convergence (typically within 50 ms) in
Layer 2 Ethernet ring topologies?
A. Spanning Tree Protocol
B. Flex Links
C. Resilient Ethernet Protocol
D. Spatial Reuse Protocol
E. Resilient Packet Ring
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=54
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QUESTION: 55
Within an MPLS domain, which table is used by the ingress edge LSR to make forwarding
decisions when an unlabeled IP packet is received?
A. FIB
B. LFIB
C. LIB
D. MP-BGP
E. VRF
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=55
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QUESTION: 56
Which three statements about access control lists on a Cisco IOS router are true? (Choose
three)
A. The more specific ACL entries should be placed at the top of the ACL.
B. The generic ACL entries should be placed at the top of the ACL, to filter general
traffic and reduce noise on the network.
C. ACLs always search for the most specific entry before taking any filtering action.
D. Router-generated packets cannot be filtered by the interface ACLs on the router.
E. Extended ACLs should be placed as close to the destination as possible.
F. There must be at least one permit statement in an ACL, or all traffic is denied.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=56
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QUESTION: 57
Which Cisco IOS access list permits HTTP traffic that is sourced from host 10.1.129.100 port
3030 and that is destined to host 192.168.1.10?
A. access-list 101 permit tcp any eq 3030
B. access-list 101 permit tcp 10.1.128.0 0.0.1.255 eq 3030 192.168.1.0 0.0.0.15 eq
www
C. access-list 101 permit tcp 10.1.129.0 0.0.0.255 eq www 192.168.1.10 0.0.0.0 eq
www
D. access-list 101 permit tcp host 192.168.1.10 eq 80 10.1.0.0 0.0.255.255 eq 3030
E. access-list 101 permit tcp 192.168.1.10 0.0.0.0 eq 80 10.1.0.0 0.0.255.255
F. access-list 101 permit ip host 10.1.129.100 eq 3030 host 192.168.1.100 eq 80
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=57
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QUESTION: 58
What is dual IOS mode on the Cisco ASR 1001 Router?
A. redundant IOS processes that are running on the active RP and standby RP
B. active and standby IOS processes that are running on a single RP
C. separate Cisco IOS XE and IOS XR processes that are running on a single RP
D. separate Cisco IOS XE and IOS XR processes that are running on two different RPs
E. checkpointed redundant IOS processes that are running on two different RPs in
active/active mode
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=58
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QUESTION: 59
Which Cisco platform runs the Cisco IOS XE operating system?
A. Cisco ASR9K
B. Cisco CRS
C. Cisco 12000 GSR
D. Cisco ASR1K
E. Cisco ME 3400
F. Cisco ISR-G2
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=59
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QUESTION: 60
A service provider needs to implement a managed CE device that supports Cisco IOS ISSU,
and the current CE support staff is highly trained in Cisco IOS only. Which Cisco router
platform should the service provider implement as the managed CE device?
A. Cisco ASR1K
B. Cisco ISR-G2
C. Cisco ASR9K
D. Cisco 12000 GSR
E. Cisco 7200
F. Cisco 7600
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=60
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QUESTION: 61
On Cisco IOS XR software, what are the four valid address-family configuration command
options in static route configuration mode? (Choose four.)
A. address-family ipv4 unicast
B. address-family ipv6 unicast
C. address-family ipv4 multicast
D. address-family ipv6 multicast
E. address-family vpnv4
F. address-family vpnv6
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=61
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QUESTION: 62
Which three statements about service provider network requirements are true? (Choose three.)
A. Service provider networks are becoming more specialized, with providers offering
only one service.
B. Service providers connect customers to the Internet.
C. Jitter and packet loss are no longer an issue.
D. Multiple access technologies are supported.
E. Customers can connect directly using copper, wireless, or fiber-optic links.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=62
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QUESTION: 63
Which three are common ISP access network technologies? (Choose three.)
A. DSL
B. Cable modem
C. DWDM
D. MPLS
E. PON
F. MP-BGP
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=63
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QUESTION: 64
Which three Cisco platforms are classified as core routers? (Choose three.)
A. Cisco XR 12000
B. Cisco ME 3400
C. Cisco ASR 1006
D. Cisco CRS-3
E. Cisco ASR 9010
F. Cisco 3900
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=64
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QUESTION: 65
Which statement about Cisco IOS XE software is true?
A. It uses a two-stage configuration process.
B. It is identical in look and feel to Cisco IOS software.
C. It runs on the Cisco ASR 9010 platform.
D. Packages can be added using the install add and install activate commands.
E. It runs on the Cisco ME 3400 platform.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=65
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QUESTION: 66
Which three statements about VLAN implementation in a Layer 2 switch environment are
true? (Choose three.)
A. The Cisco IOS switchport access vlan interface configuration command is used to
configure the native VLAN on the switch port.
B. 802.1AD supports VLAN overlap.
C. VLANs can span across multiple switches.
D. 802.1Q encapsulation is used to identify different VLANs on a trunk port.
E. Inter-VLAN routing is performed between VLAN tunnel ports.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=66
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QUESTION: 67
Refer to the configuration example exhibit. cisco&c=640-878&q=1 Which statement is true?
A. A trunk port has been created and VLAN has been allowed.
B. An access port has been created on a UN
I.
C. A customer VLAN of 209 is configured.
D. A QinQ VLAN of 118 is configured.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=67
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QUESTION: 68
Which two statements about the link state routing process are true? (Choose two.)
A. It uses the DUAL algorithm.
B. It uses metrics such as AS path.
C. All routers in the area have link state databases.
D. The administrative distance is 1 by default.
E. Each router in the area floods LSPs to all neighbors.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=68
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QUESTION: 69
Which two statements about carrier-grade NAT are true? (Choose two.)
A. It conserves IPv4 addresses.
B. A service provider issues private IP addresses to its customers.
C. A service provider translates the private IP address of its customer to another private
IP address.
D. It is implemented on the CE and PE routers.
E. It is designed to simplify IPv6 addressing.
Answer: http://www.twpass.com/twpass.com/exam.aspx?ecode=640-878&qno=69
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