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Q1. 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 

Q2. Refer to the exhibit. 

The prefix 10.1.1.64/28 should be advertised to the PE router, yet the prefix is not being received by the PE. Which configuration should be applied on CE in order to fix this issue? 

A. jp prefix-list ROUTES_TO_SP seq 1 permit 10.1.1.64/28 

B. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.128 mask 255.255.255.128 

C. ip prefix-list ROUTES_TO_SP permit 10.1.1.64/28 

D. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.0 mask 255.255.255.0 

Answer:

Q3. A network engineer wants to decrease the convergence time of a network that is running integrated IS-IS as an IGP, at the expense of bandwidth and CPU usage. Which two configuration tasks achieve this goal? (Choose two.) 

A. Configure the hold time to be 1 second. 

B. Configure the hello interval to be minimal. 

C. Ensure that hello-padding is disabled. 

D. Ensure that the hello multiplier is set to 3. 

E. Configure the hello multiplier to be 3. 

Answer: B,D 

Explanation: 

https://books.google.co.in/books?id=u_XOQy4cBkgC&pg=PA184&lpg=PA184&dq=what+is +hello+multiplier+minimal+time+in+integrated+is-is&source=bl&ots=XqDfyO3AVT&sig=NHY0L-k-nhHrg7h6i3RWorttgcE&hl=en&sa=X&ved=0CDAQ6AEwA2oVChMIhfCI5ZXTxwIVQwaOC h3PfQea#v=onepage&q=what%20is%20hello%20multiplier%20minimal%20time%20in%20 integrated%20is-is&f=false 

Q4. Refer to the exhibit. 

Why is RC unable to receive prefix 1.1.1.1/32? 

A. On RB. neighbor 10.10.12.1 send-community is not configured. 

B. On RA, ip bgp-community new-format is not configured. 

C. On RB. neighbor 10.10.23.3 send-community is not configured. 

D. On RA, neighbor 10.10.12.2 send-community is not configured. 

E. On RC. ip bgp-community new-format is not configured. 

F. On RB, ip bgp-community new-format is not configured 

G. On RB. neighbor 10.10.23.3 next-hop-self is not configured. 

Answer:

Q5. What is the PPMP label used for? 

A. for the ingress replication model with BIDIR-PIM in an overlay model 

B. only for the inter-AS mVPN models that use mLDP 

C. for the partitioned mVPN model with PIM signaling in an overlay model 

D. only for unicast over MPLS VPN 

E. for all the default MDT and mVPN models 

Answer:

Explanation: http://lostintransit.se/tag/bgp/ 

https://tools.ietf.org/html/draft-rosen-l3vpn-mvpn-mspmsi-08#section-3.2.2.1 

Q6. Which OSPF feature allows the router to recompute SPF changes for only the affected part of the SPT? 

A. PRC 

B. fast hellos 

C. BFD across the entire backbone area 

D. incremental SPF 

Answer:

Q7. An IS-IS enabled router with multiple IS-IS neighbors is required to have BFD sessions with all neighbors. Which BFD mode should you use when you want to save the overhead of periodic protocol control packets? 

A. echo 

B. asynchronous 

C. demand 

D. active 

Answer:

Explanation: https://tools.ietf.org/html/rfc5880#section-3.1 RFC - 5880 

Q8. In a Layer 2 VPN service, which is the default behavior of an EVC-based platform with regards to VLAN manipulation? 

A. keeps the VLAN tag of the incoming frame 

B. attaches two VLAN tags to the incoming frame 

C. removes the VLAN tag from the incoming frame 

D. removes all the VLAN tags from the incoming frame 

E. sets the VLAN tag of the incoming frame 

Answer:

Explanation: http://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/116453-technote-ios-xr-l2vpn-00.html#anc7 

Q9. DRAG DROP 

Drag and drop the IPFIX terminology on the left to the correct description on the right. Not all options will be used. 

Answer:  

Q10. 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