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Q61. An engineer is troubleshooting L3VPN traffic loss over the MPLS-enabled core network when new core links were enabled. Assuming that the IGP is properly configured, which issue causes a temporary data flow blackholing when the IGP and LDP reconvenes?
A. LDP is a Layer 2 protocol forwarding label packets before the IGP reconvened.
B. IP packets are forwarded as soon as routes are learned over a new IGP adjacency before the label exchange happens over the new links
C. MP-BGP sessions between PE and RR routers require extra time to reconverge than the underlying IGP.
D. MPLS-TE tunnels without LDP adjacencies are used over the new links black-holing the traffic before the LDP label exchange is completed
Answer: B
Q62. Refer to the exhibit:
A customer with two sites is running RIP as a CE-PE routing protocol. These two sites are connected through Layer 3 VPN services. Each of these CE routers cannot ping the LAN IP address of the other router. Which action resolves this issue?
A. On PE2 under RIP VRF ABC address family, add the redistribute bgp 100 metric 5 command.
B. On PE1 under RIP VRF ABC address family, add the network 10.10.13.0 command.
C. On both PEs under BGP VRF ABC address family, add the bgp bestpath igp-metric ignore command.
D. On PE1 under RIP VRF ABC address family, add the no auto-summary command.
E. On PE2 under BGP VRF ABC address family, add the bgp redistribute-internal command.
Answer: A
Q63. In a multi-VRF scenario using OSPF as PE-CE routing protocol, which Cisco IOS command allows the CE to accepts routes from PE inside of each VRF?
A. router ospf <process id> vrf<vrf name> capability vrf-lite
B. router ospf<process id> vrf<vrf name> domain-id <value>
C. router ospf <process id> domain-id <value>
D. router ospf <process id> capability vrf-lite
Answer: A
Q64. In a virtualization concept, which is one of the characteristic of the HVR solution? A. introduces significant contention of resources
B. implements shared control plane resources
C. implements dedicated chassis resources
D. implements dedicated data plane resources
Answer: D
Q65. Refer to the exhibit. After the BGP TCP negotiation between RouterA and RouterB, what will be the value of the keep alive timer and the hold-down timer, respectively?
A. 3 seconds and 9 seconds
B. 60 seconds and 180 seconds
C. 10 seconds and 9 seconds
D. no value, because BGP negotiation will not be successful
E. 10 seconds and 10 seconds
F. 10 seconds and 30 seconds
G. 3 seconds and 30 seconds
H. 3 seconds and 10 seconds
Answer: A
Q66. Which two frame types are correct when configuring T3 interfaces? (Choose two.)
A. M23
B. G.832
C. Extended Super Frame
D. C-bit parity
E. G.751
F. Super Frame
Answer: A,D
Explanation: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/interfaces/configuration/guide/hc42crsbook/hc42t3e3.html
Q67. An engineer wants to configure MPLS TE Fast Reroute with link protection on five routers. Which methodology can reduce configuration on the point of the local repair router and successfully complete the task?
A. Configure a backup tunnel on the PLR.
B. Enable the autotunnel backup feature.
C. Configure a backup tunnel on the tunnel head end router.
D. Enable the autotunnel primary feature.
Answer: B
Explanation: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/mpls/configuration/guide/b_mpls_cg42crs/b_mpls_cg42crs_chapter_0100.html#concept_ F19BEEEFC831436AAC9291A87F9B34E5
Q68. Which two statements about Unified MPLS are true? (Choose two.)
A. Unified MPLS works on Cisco IOS XR Software only.
B. Unified MPLS extends MPLS across multidomain networks in a scalable manner.
C. New technologies or protocols are not used; only MPLS, LDP, IGP, and BGP are used.
D. ABR loopback prefixes should always be redistributed from the core IGP into the aggregation IGP.
E. The RRs are part of the control path only.
Answer: B,D
Explanation: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/116127-configure-technology-00.pdf
Q69. When IPv6 is enabled on an interface, which three multicast addresses does the configured interface automatically join? (Choose three.)
A. FF01::2
B. FEC0::1
C. FF02:0:0:0:0:1:FF00::/104
D. FF02::1
E. FF01::1
F. FF02::2
G. FF02::D
H. FF02::5
Answer: C,D,F
Explanation:
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/ipv6.pdf https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xml
Q70. Which two flexible service mapping features that are used on the ES40 line card can classify traffic into different service instances, in order to consume fewer VLANs? (Choose two.)
A. CoS
B. DSCP
C. IP precedence
D. MPLS experimental bit
E. ToS
F. EtherType
Answer: A,F
Explanation:
Reference: http://www.cisco.com/c/en/us/td/docs/routers/7600/install_config/ES40_config_guide/es40_ sw_config/es40_chap7.html#pgfId-1500091