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Q341. Which two statements about the function of PIM designated router are true? (Choose two.) 

A. It registers directly connected source to the PIM rendezvous point. 

B. It sends PIM asserts on the interface of the outgoing interface list. 

C. It sends PIM Join/Prune messages for directly connected receivers. 

D. It forwards multicast traffic from the source into the PIM network. 

E. It sends IGMP queries. 

Answer: A,C 


Q342. Refer to the exhibit. 

R1 is able to reach only some of the subnets that R2 is advertising. Which two configuration changes can you make to ensure that R1 can reach all routes from R2? (Choose two.) 

A. Add an additional permit statement to the LOOPBACKS route map. 

B. Modify the LOOPBACKS access list to include all loopback subnets. 

C. Add an additional statement in the LOOPBACKS route map to match both Level 1 and Level 2 circuits. 

D. Add an additional statement in the LOOPBACKS route map to match the R1 CLNS address. 

E. Configure the interfaces between R1 and R2 with a Level 1 IS-IS circuit. 

F. Configure the interfaces between R1 and R2 with a Level 2 IS-IS circuit. 

Answer: A,B 

Explanation: 

In this example, the access list is using a 0.0.3.255 wildcard mask, so only the loopback IP’s of 172.16.0.0 – 172.16.3.255 will be included. We need to add another statement to allow loopback 4 to be advertised, or modify the wildcard mask to include them all. 


Q343. Refer to the exhibit. 

Which statement is true? 

A. There is no issue with forwarding IPv6 traffic from this router. 

B. IPv6 traffic can be forwarded from this router, but only on Ethernet1/0. 

C. IPv6 unicast routing is not enabled on this router. 

D. Some IPv6 traffic will be blackholed from this router. 

Answer: D 

Explanation: 

Here we see that the IPV6 default route shows two different paths to take, one via Ethernet 1/0 and one via Ethernet 0/0. However, only Eth 1/0 shows a next hop IPV6 address (the link local IPV6 address). There is no link local next hop addressed known on Eth 0/0. Therefore, traffic to all destinations will be load balanced over the two paths, but only half of the IPv6 traffic will be sent to the correct upstream router. 


Q344. Refer to the exhibit. 

Service provider SP 1 is running the MPLS-VPN service. The MPLS core network has MP-BGP configured with RR-1 as route reflector. What will be the effect on traffic between PE1 and PE2 if router P1 goes down? 

A. No effect, because all traffic between PE1 and PE2 will be rerouted through P2. 

B. No effect, because P1 was not the only P router in the forwarding path of traffic. 

C. No effect, because RR-1 will find an alternative path for MP-BGP sessions to PE-1 and PE-2. 

D. All traffic will be lost because RR-1 will lose the MP-BGP sessions to PE-1 and PE-2. 

Answer: D 

Explanation: 

If the connection to the route reflector goes down, then routes from PE-1 will not get advertised to PE2, and vice versa. Route reflectors are critical in an MPLS VPN such as the one shown, which is why it is a best practice to have multiple route reflectors in this kind of network. 


Q345. Which two statements about Cisco Performance Routing are true? (Choose two.) 

A. It analyzes application performance to make routing decisions. 

B. When determining the best path, it prefers the shortest path. 

C. It can help the administrator determine the need for bandwidth upgrades. 

D. It operates entirely in the data plane. 

E. It can use EIGRP feasible successors to determine an alternate path. 

F. It analyzes system hardware performance to make routing decisions. 

Answer: A,E 


Q346. Which three events can cause a control plane to become overwhelmed? (Choose three.) 

A. a worm attack 

B. processing a stream of jumbo packets 

C. a microburst 

D. a configuration error 

E. a reconvergence failure 

F. a device-generated FTP session 

Answer: A,D,E 


Q347. Independent, multiple OSPF processes are entered on the same router, and the processes have the same destination route. Which OSPF process is used? 

A. The route with the fewest hops is used. 

B. Both processes are used to load balance the traffic. 

C. The first route process that places a route into the routing table is used. 

D. The route with the shortest prefix is used. 

Answer: C 


Q348. What are the two requirements for BGP to install a classful network into the BGP routing table? (Choose two) 

A. The AS contains the entire classfull network. 

B. A classful network statement with a lower administrative distance is in the routing table. 

C. Auto-summary is enabled. 

D. A classful network statement with a classful mask is in the routing table. 

E. Synchronization is enabled. 

F. Synchronization is disabled. 

Answer: C,D 


Q349. Refer to the exhibit. 

Why is the OSPF state in 2WAY/DROTHER? 

A. This is the expected output when the interface Ethernet0/0 of R1 is configured with OSPF Priority 0. 

B. There is a duplicate router ID. 

C. There is an MTU mismatch. 

D. There is an OSPF timer (hello/dead) mismatch. 

E. This is the expected output when R1 is the DR. 

Answer: A 

Explanation: 

Sometimes it is desirable for a router to be configured so that it is not eligible to become the DR or BDR. You can do this by setting the OSPF priority to zero with the ip ospf priority priority# interface subcommand. If two OSPF neighbors both have their OSPF interface priority set to zero, they establish two-way adjacency instead of full adjacency. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13683-11.html 


Q350. Which three statements about the route preference of IS-IS are true? (Choose three.) 

A. An L1 path is preferred over an L2 path. 

B. An L2 path is preferred over an L1 path. 

C. Within each level, a path that supports optional metrics is preferred over a path that supports only the default metric. 

D. Within each level of metric support, the path with the lowest metric is preferred. 

E. The Cisco IS-IS implementation usually performs equal cost path load balancing on up to eight paths. 

F. Both L1 and L2 routes will be installed in the routing table at the same time. 

Answer: A,C,D 

Explanation: 

Given multiple possible routes to a particular destination, an L1 path is preferred over an L2 path. Within each level, a path that supports the optional metrics is preferred over a path that supports only the default metric. (Again, Cisco supports only the default metric, so the second order of preference is not relevant to Cisco routers.) Within each level of metric support, the path with the lowest metric is preferred. If multiple equal-cost, equal-level paths are found by the Decision process, they are all entered into the route table. The Cisco IS-IS implementation usually performs equal-cost load balancing on up to six paths. 

Reference: http://www.realccielab.org/operation-of-integrated-is-is.html