An IBGP mesh design is being scoped, and in the discussions, one of the design engineers proposes the use
of route reflectors. Which limitation is valid when using route reflectors in this design?
A. The configuration complexity on the routers will be increased.
B. Route reflectors will limit the total number of routes in the topology.
C. Multipath information is difficult to propagate in a route reflector topology.
D. Route reflectors will cause an opportunity to create routing loops.
Answer: C
Explanation:
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QUESTION 181
Refer to the exhibit. All routers in this network are configured to run OSPF on all interfaces. If you examine the OSPF database on R4, in which LSA will you find 10.1.5.0/24?
A. 10.1.5.0/24 is in a network (type 2) LSA originated by R3.
B. 10.1.5.0/24 is in a summary (type 3) LSA originated by R3.
C. 10.1.5.0/24 is not in any LSA in the OSPF database at R4, because R4 and R3 are in different areas.
D. 10.1.5.0/24 is in a router (type 1) LSA generated by R3.
Answer: B
QUESTION 182
A planned EBGP network will use OSPF to reach the EBGP peer addresses. Which of these conditions should be avoided in the design that could otherwise cause the peers to flap continuously?
A. An ACL blocks TCP port 179 in one direction.
B. IP addresses used to peer are also being sent via EBGP.
C. The OSPF area used for peering is nonbackbone (not area 0).
D. The routers are peered by using a default route sent by OSPF.
Answer: B
QUESTION 183
When designing a large full mesh network running OSPF, how would you reduce LSA repetition?
A. Elect a DR and BDR.
B. Use access control lists to control outbound advertisements.
C. Choose one or two routers to re-flood LSA information.
D. Put each of the point-to-point links in your full mesh networking into a separate area.
Answer: C
QUESTION 184
A data center provider has designed a network using these requirements:
– Two data center sites are connected to the public Internet.
– Both data centers are connected to different Internet providers.
– Both data centers are also directly connected with a private connection for the internal traffic, and public Internet traffic can also be routed at this direct connection.
– The data center provider has only one /19 public IP address block.
Under normal conditions, Internet traffic should be routed directly to the data center where the services are located. When one Internet connection fails, the complete traffic for both data centers should be routed by using the remaining Internet connection. In which two ways can this routing be achieved? (Choose two.)
A. The data center provider must have an additional public IP address block for this routing.
B. One /20 block is used for the first data center and the second /20 block is used for the second
data center. The /20 block from the local data center is sent out with a low BGP weight and the
/20 block from the remote data center is sent out with a higher BGP weight at both sites.
C. One /20 block is used for the first data center and the second /20 block is used for the second
data center. The /20 block from the local data center is sent out without path prepending and
the /20 block from the remote data center is sent out with path prepending at both sites.
D. One /20 block is used for the first data center and the second /20 block is used for the second
data center. Each /20 block is only sent out locally. The /19 block is sent out at both Internet
connections for the backup case to reroute the traffic through the remaining Internet connection.
E. One /20 block is used for the first data center and the second /20 block is used for the second
data center. The /20 block from the local data center is sent out with a low BGP local preference
and the /20 block from the remote data center is sent out with a higher BGP local preference at
both sites.
F. BGP will always load-balance the traffic to both data center sites.
Answer: CD
QUESTION 185
Your network operations team is deploying Access Control Lists (ACLs) across your Internet gateways. They wish to place an ACL inbound on the Internet gateway interface facing the core
network (the “trusted” interface). Which one of these addresses would the ACL need for traffic sourced from the inside interface, to match the source address of the traffic?
A. inside local
B. outside local
C. inside global
D. outside global
Answer: A
QUESTION 186
Refer to the exhibit. The routers in this network are all running EIGRP. What is the most important step to take in order to ensure that this network core will converge quickly should a link failure occur?
A. make certain EIGRP is running across all links
B. make certain EIGRP is not running across non-transit links
C. make certain the maximum number of paths on both of the routers is two
D. add another link between the two routers with no servers and set the metric on this new link equal
to the other four links
Answer: B
QUESTION 187
During a corporate merger, a network designer is asked for a solution that will provide connectivity between the two enterprise networks. The solution must have the ability to support video sessions so that the CEO can message merger activities to the employees. The designer decides to consider multicast as a transport with MSDP to provide redundancy. Which transport feature does the network designer need to apply to the interconnecting firewall to ensure that Source-Active messages between the MSDP peers can be sent in both enterprise networks?
A. unicast over a UDP connection
B. multicast over a UDP connection
C. unicast over a TCP connection
D. multicast over a TCP connection
Answer: C
QUESTION 188
When developing an MVPN design, which performance and scalability consideration must be taken into account?
A. CE end-to-end PIM adjacency establishment
B. multicast data sent to all PE routers on the default MDT
C. RP placement in the multicast VRF
D. RP placement in the customer network
Answer: B
QUESTION 189
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