What technique should be used on BGP edge routers to prevent a multi-homed autonomous system from becoming a transit system?
A. Advertise with a high MED value all networks that are discovered via external BGP.
B. Set the no-export community attribute on all networks that are advertised externally.
C. Remove the AS-Path information on all routes in the BGP table prior to advertising externally.
D. Set the origin code to incomplete for all networks that are discovered via external BGP.
E. Only advertise networks externally if they have been discovered via internal BGP.
F. Use an outgoing distribution list to filter all networks not originating from inside the autonomous system.
Correct Answer: F
Which two methods advertise internal networks to external ISPs via BGP? (Choose two.)
A. using aggregate routes
B. disabling synchronization
C. forcing the next-hop address
D. defining routes via the network statement
Correct Answer: AD
Why should iBGP sessions be fully meshed within a Transit AS?
A. BGP requires redundant TCP sessions between iBGP peers.
B. A full mesh allows for optimal routing within the Transit AS.
C. Routes learned via iBGP are never propagated to other eBGP peers.
D. Routes learned via iBGP are never propagated to other iBGP peers.
E. Routes learned via eBGP are never propagated to other iBGP peers.
Correct Answer: D
When the BGP path selection process is being performed on a Cisco router, which BGP attribute is used first when determining the best path?
A. local preference
Correct Answer: C
Which two conditions can cause BGP neighbor establishment to fail? (Choose two.)
A. There is an access list blocking all TCP traffic between the two BGP neighbors.
B. The IBGP neighbor is not directly connected.
C. BGP synchronization is enabled in a transit autonomous system with fully-meshed IBGP neighbors.
D. The BGP update interval is different between the two BGP neighbors.
E. The BGP neighbor is referencing an incorrect autonomous system number in its neighbor statement.
Correct Answer: AE
Refer to the exhibit. Routing updates for the 192.168.1.0 network are being received from all three neighbors. Which statement is correct regarding the result of the configuration shown?
A. The router will prefer the next hop of 172.16.1.1 for packets destined for the 192.168.1.0 network.
B. The router will prefer the next hop of 172.26.1.1 for packets destined for the 192.168.1.0 network.
C. The router will advertise the 192.168.1.0 network only to 172.30.1.1.
D. The router will advertise the 192.168.1.0 network only to 172.26.1.1.
E. The router will prefer the next hop of 172.26.1.1 for packets except those destined for the 192.168.1.0 network.
Correct Answer: B
Which two reductions are the correct reductions of the IPv6 address
2001:0d02:0000:0000:0014:0000:0000:0095? (Choose two.)
Correct Answer: DE
What is the IPv6 address FF02::2 used for?
A. all hosts in a local segment
B. all routers in a local segment
C. all hosts in a particular multicast group
D. all routers in an autonomous system
Correct Answer: B
Refer to the exhibit. Routers R1 and R2 are IPv6 BGP peers that have been configured to support a neighbor relationship over an IPv4 internet work. Which three neighbor IP addresses are valid choices to use in the highlighted section of the exhibit? (Choose three.)
Correct Answer: ACE
Refer to the exhibit. The 6to4 overlay tunnel configuration has been applied on each router to join isolated IPv6 networks over a IPv4 network. Which statements regarding the 6to4 overlay tunnel is true?
A. The least significant 32 bits in the address referenced by the ipv6 route 2002::/16 Tunnel0 command will correspond to the interface E0/0 IPv4 address
B. The least significant 32 bits in the address referenced by the ipv6 route 2002::/16 Tunnel0 command will correspond to the IPv4 address assigned to the tunnel source
C. The configuration is invalid since the tunnel source command must be configured with an IPv6 address
D. This is actually a configuration example of an IPv4-compatible tunnel and not a 6to4 tunnel
E. This is actually a configuration example of an ISATAP overlay tunnel and not a 6to4 tunnel
Correct Answer: B
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