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Q81. A network engineer is responsible for implementing a solution with Cisco IOS XR Software that insures continuous forwarding during a control plane failure. Which two technologies should the engineer consider? (Choose two.) 

A. TE FRR 

B. IP FRR 

C. graceful restart 

D. BFD 

E. NSR 

Answer: C,E 

Explanation: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-3/mpls/configuration/guide/b_mpls_cg43xcrs/b_mpls_cg43crs_chapter_01.html#task_1129 

Q82. DRAG DROP 

Drag and drop the IOS XR NTP access group options on the left to the right from the least restrictive (top) to the most restrictive order (bottom). 

Answer: 

Q83. A network administrator wants to implement an IP dampening feature for a network. Which parameter identifies how fast the accumulated penalty can decay exponentially? 

A. reuse threshold 

B. suppress threshold 

C. half-life period 

D. maximum suppress time 

Answer: C 

Explanation: Reference: 

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/15-sy/iri-15-sy-book/iri-ip-event-damp.html 

Q84. Refer to the exhibit. How will the redistributed routes on R1 from EIGRP into OSPF be installed in the R4 routing table? 

A. as a default route with an E2 route type 

B. as a default route with an IA route type 

C. as specific routes with an E2 route type 

D. as specific routes with an N2 route type 

E. as a default route with an N2 route type 

Answer: B 

Explanation: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/6208-nssa.html http://www.cisco.com/image/gif/paws/6208/nssa.pdf 

Q85. A Service Provider is offering VoIP services and a service level agreement to customers. Which configuration provides validation to customers that the service level agreement has been honored? 

A. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tos 160 ip sla schedule 999 life forever start-time now 

B. ip sla 999 icmp-jitter 209.165.200.225 tos 160 ip sla schedule 999 life forever start-time now 

C. ip sla 999 icmp-jitter 209.165.200.225 tag VoIP-SLA ip sla schedule 999 life forever start-time now 

D. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tag VoIP-SLA 

ip sla schedule 999 life forever start-time now 

Answer: D 

Q86. A Service Provider wants to extend MPLS WAN endpoints in the cloud at the edge of a customer network within the cloud. Which platform will meet this requirement? 

A. Cisco NX-OS 

B. Cisco CSR1000v 

C. Cisco ISR Routers running IOS 

D. Cisco CRS-1 

E. Cisco ASR Routers running IOS-XR 

Answer: B 

Explanation: http://www.cisco.com/c/en/us/products/collateral/routers/cloud-services-router-1000v-series/datasheet-c78-733443.html 

Q87. What are two advantages of Cisco IOS XR Software over Cisco IOS Software? (Choose two.) 

A. a configuration that is grouped by interface 

B. a configuration that is grouped by process 

C. one-stage configuration 

D. a monolithic OS 

E. a two-stage configuration 

Answer: B,E 

Q88. A service provider is implementing Ethernet solutions for clients that are not being provisioned within the MPLS core network. Which solution allows the Service Provider to complete Ethernet circuit provisioning in this scenario? 

A. L2TPv3 

B. VPLS 

C. AToM 

D. PPPoE 

Answer: A 

Explanation: 

L2TPv3 defines the L2TP protocol for tunneling Layer 2 payloads over an IP core network using Layer 2 virtual private networks (VPNs). Benefits of this feature include the following: 

. Simplifies deployment of VPNs. 

. Does not require Multiprotocol Label Switching (MPLS) virtual private network (VPN). 

. Supports Layer 2 tunneling over IP for any payload. 

. Supports data encapsulation directly over IP (IP protocol number 115), not using User Datagram Protocol (UDP) . 

Supports point-to-point sessions, not point-to-multipoint or multipoint-to-point sessions . 

Supports sessions between the same Layer 2 protocols, for example Frame Relay-to-Frame Relay or ATM-to-ATM. 

Q89. QoS is applied on an outgoing interface as shown below: 

What will the QoS result be for egress traffic with an average queue depth of 40 that is marked as DSCP AF32? 

A. Traffic will be dropped with a random rate less than the one defined by MPD. 

B. All traffic will be tail dropped. 

C. Traffic will be dropped with a rate of 1 packet out of 20. 

D. Traffic will be dropped with a rate of 1 packet out of 30. 

Answer: C 

Q90. Users are complaining of intermittent high packet loss for seconds at a time. The engineer troubleshooting the issue finds that a TenGigE link is bouncing for milliseconds at a time, causing the traffic path to reconverge onto a congested FastEthernet link. What can the engineer do to prevent this service-affecting reconvergence only in the case of momentary link bounces until the link can be repaired? 

A. decrease the carrier-delay up on both sides of the link 

B. disable keepalives and BFD 

C. decrease the carrier-delay down on both sides of the link 

D. increase the carrier-delay up on both sides of the link 

E. increase the carrier-delay down on both sides of the link 

Answer: D