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Q1. Which are the two advantages if an ISP chooses a platform that runs Cisco IOS-XR Software instead of Cisco IOS Software? (Choose two.)
A. Cisco IOS XR Software functions as a message-passing operating system.
B. The system's scheduler is priority-based.
C. He context switching is based on Cisco Express Forwarding.
D. VoIP traffic is hardware-processed for real-time response.
E. Communication between client and server is realized by a dedicated mechanism.
Answer: A,B
Q2. Which QoS DiffServ mode preserves the original customer IP marking besides of on egress PE router uses the DSCP value of this IP packet on outbound queuing?
A. MPLS PHB mode
B. Pipe mode
C. IntServ mode
D. Uniform mode
E. Short-Pipe mode
Answer: E
Q3. Which QoS method is available when GRE is used to provide MPLS VPN services over an IP-only core?
A. matching MPLS EXP on the physical interface
B. matching EXP on the tunnel interface
C. matching DSCP on the physical interface
D. matching DSCP on the tunnel interface
Answer: C
Q4. Two Service Providers are beginning a merger between AS boundaries to provide MPLS-enabled services between their networks. Customers are using both Service Providers for services and, under certain circumstances; there are requirements to extend Layer 2 VPN circuits between each provider. The providers are in the process of completing the technical merger. However, the MPLS is not supported between the providers. Which action allows MPLS Layer 2 VPN circuits to be built over the inter-AS link?
A. Create a GRE tunnel with the mpls ip command between ASBRs.
B. Create Layer 2 VPN peerings between PE routers from each provider.
C. Create a VPNv4 peering between ASBRs to advertise labels between each provider.
D. Create a sham link between ASBR routers to enable a superbackbone peering for Layer 2 VPN signaling.
Answer: A
Explanation: https://ccdewiki.wordpress.com/2013/07/02/inter-as-l2vpn-mpls-solutions/
Q5. Due to recent acquisitions, a company’s MPLS infrastructure is growing very quickly. Concerns arise about labeling each and every IP address on the P router. Which command would significantly reduce the label allocations without compromising LDP functionalities?
A. ip prefix-list List1 deny prefix/prefix_length
!
mpls ldp label
allocate global prefix-list List1
B. mpls ldp label
allocate global host-routes
C. access-list 1 permit subnet wildcard
mpls ldp neighbor neighbor_ip labels accept 3
D. mpls ldp password required for 10
access-list 10 permit host_ip_1
access-list 10 permit host_ip_2
access-list 10 permit host_ip_n
Answer: A
Q6. Which are the three benefits of using the Yang model? (Choose three.)
A. Reduce lab footprint
B. Improve access to resources
C. Support interoperability that provides a standard way to model management data
D. Support simplified network management applications
E. Provide a scale virtual lab environment
F. Support programmatic interfaces
Answer: C,D,F
Explanation: https://tools.ietf.org/html/rfc6020#page-11
Q7. Refer to the exhibit.
A service provider is using the configuration to determine traffic paths based on MPLS EXP markings. Which technology is being implemented?
A. MPLS TE FRR
B. CBTS
C. IP FRR
D. MPLS TE
E. PBTS
F. DS-TE
Answer: B
Q8. 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
Q9. Two routers that are running MPLS and LDP have multiple links that than connect them to each other. An engineer wants to ensure that the label bindings are not flushed from the LIB if one of the links fails. Which configuration meets this requirement?
A. the mpls ldp neighbor targeted command
B. the mpls ip command on a Cisco MPLS TE tunnel
C. the mpls ldp discovery targeted-hello accept command
D. the mpls ldp session protection command
Answer: D
Explanation:
http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/fssespro.html#wp1027177
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/xe-3s/asr1000/mp-ldp-xe-3s-asr1000-book/mp-ldp-sessn-prot.html#GUID-FA0EF183-FA7C-488A-85C1-82BFEB91DCA7
Q10. Refer to the exhibit. Two MPLS TE tunnels are configured with a total bandwidth guarantee of 100 Mbps. However, Tunnel 1 has a requirement to have one-fifth of this total bandwidth. Which two configurations accomplish this goal? (Choose two.)
A. Configure tunnel mpls traffic-eng bandwidth 20000 under the Tunnel 1 interface.
B. Configure bandwidth 20000 under the Tunnel 1 interface.
C. Configure tunnel mpls traffic-eng bandwidth 80000 under the Tunnel 2 interface.
D. Configure bandwidth 80 Mbps under physical interfaces in the path PE1-P2-PE2.
E. Configure bandwidth 20 Mbps under physical interfaces in the path PE1-P1-PE2
F. Configure bandwidth 80000 under the Tunnel 2 interface.
Answer: A,C
Explanation: See Configuration Guide
Q11. In a PE-CE scenario using OSPF as the routing protocol, a down-bit set can be advertised in which OSPF LSA type?
A. type 1 LSA
B. type 2 LSA
C. type 3 LSA
D. type 5 LSA
E. type 7 LSA
Answer: C
Q12. Refer to the exhibit. Both MPLS TE tunnel 14 and MPLS TE tunnel 124 pass over the same physical links. Which configuration on R1 enables TE 14 to be the primary tunnel and TE 124 to become active when TE 14 is admin disabled?
A. Interface Tunnel14
tunnel mpls traffic-eng priority 3 1
!
Interface Tunnel124
tunnel mpls traffic-eng priority 5 4
B. Interface Tunnel14
tunnel mpls traffic-eng priority 4 1
!
`Interface Tunnel124
tunnel mpls traffic-eng priority 3 2
C. Interface Tunnel14
tunnel mpls traffic-eng priority 7 7
!
Interface Tunnel124
tunnel mpls traffic-eng priority 1 1
D. Interface Tunnel14
tunnel mpls traffic-eng priority 3 2
!
Interface Tunnel124
tunnel mpls traffic-eng priority 4 1
Answer: B
Q13. Refer to the exhibit.
The NOC engineer noticed that the R2 router system clock is not updated and synchronized to the NTP server that is configured on the R10 router. What is the issue?
A. The access list NTP_Clients is missing.
B. The access group is misconfigured.
C. The maximum number of peers and client associations is exceeded.
D. The authentication key is mismatched.
E. The PE2 router should be configured as an NTP peer instead of as a client.
Answer: C
Q14. Refer to the exhibit.
IS-IS configuration has been deployed using the default IS-IS metric value and default IS-IS metric-style. The SP decides to implement MPLS TE in all routers, except R5. In order to maintain IS-IS adjacency between R3 and R5 without impacting reachability, which command should be configured on R3 router under the IS-IS process?
A. metric-style narrow
B. metric-style wide
C. metric-style narrow transition
D. metric-style transition
Answer: D
Q15. DRAG DROP
Drag and drop the subslot of the SIP-800 card that is used on Cisco CRS routers on the left to the correct PUM ASIC process on the right.
Answer: