多项选择题Which three of the statements below correctly describe the characteristics of Autonomous Systems in routed networks?()

A. Within an AS, all routers must run either BGP or IBGP.
B. An AS uses exterior gatew ay protocols (EGPs) to exchange information with other autonomous systems.
C. An AS is a group of routers under the same technical administration.
D. Within an AS, routes learned through BGP can be redistributed using interior gateway protocols.
E. Wi thin an AS, routes learned through an interior protocol cannot be redistributed using BGP to other autonomous systems.


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1.多项选择题Which three conditions can cause BGP n eighbor establishment to fail?()

A. The IBGP neighbor is not directly connected.
B. BGP synchronization is enabled in a transit autonomous system with fully - meshed IBGP neighbors.
C. The EBGP neighbor ebgp - multihop option is set to the de fault value.
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.
F. There is an access list blocking all TCP traffic between the two  BGP neighbors.

2.单项选择题Which command displays the IBGP and EBGP neighbors that are configured?()

A. show ip bgp paths
B. show ip bgp peers
C. show ip bgp
D. show ip bgp summary

4.多项选择题Which two methods advertise internal networks to external ISPs via BGP?()

A. using aggregate routes
B. defining routes via the network statement
C. disablin g synchronization
D. forcing the next - hop address

5.单项选择题

Refer to the exhibit The neighbor 10.1.1.1 weight 200 BGP configuration command has been configured on router A. What will be the result of this configuration? ()

A. Router A will prefer the path through router B for network 172.20.0.0
B. Router A will prefer the path through router C for network 172.20.0.0
C. Packets from router D will prefer the path through router B for networks advertised by router A
D. Packets from r outer D will prefer the path through router C for networks advertised by router A

6.单项选择题What technique should be used on BGP edge routers to prevent a multi - homed autonomous system from becoming a trans it 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 pr ior 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 filte r all networks not originating from inside the autonomous system.

7.单项选择题

Refer to the exhibit. Network 10.0.0.0/8 is  being advertised to autonomous system 65550 via both external links. Which statement about the preferred path to the 10.0.0.0/8 network is true? ()

A. Router R2 will be preferred because it has the higher neighbor IP address.
B. Router R2 will be preferr ed because its neighbor has a lower autonomous system number.
C. Router R1 will be preferred because it has a lower local preference.
D. Router R2 will be preferred because it has a higher local preference.
E. Router R1 will be preferred because its nei ghbor has the higher autonomous system number.
F. Router R1 will be preferred because it has the lower neighbor IP address.

8.单项选择题

Refer to the exhibit. Routers RTA and RTB are running BGP but the session is active. What command needs to be added to esta blish the BGP session? ()

A. ip route 10.10.10.1 255.255.255.255 s0/0 ip route 10.10.10.1 255.255.255.255 s0/1
B. network 10.10.10.0
C. no synchronization
D. neighbor 10.10.10.1 next - hop - self

9.单项选择题

Examine the above configuration. What does the route map named test accomplish?()

A. permits only the 10.0.0.0/8 prefix to be advertised to the 10.1.1.1 neighbor
B. marks all prefixes received fro m the 10.1.1.1 neighbor with a MED of 200
C. marks the 10.0.0.0/8 prefix advertised to the 10.1.1.1 neighbor with a MED of 200
D. permits only the 10.0.0.0/8 prefix to be received from the 10.1.1.1 neighbor
E. marks all prefixes advertised to the 10.1.1 .1 neighbor with a MED of 200
F. marks the 10.0.0.0/8 prefix received from the 10.1.1.1 neighbor with a MED of 200

10.单项选择题Which one of the following statements about BGP is FALSE?()

A. BGP uses TCP port 179.
B. BGP ensures reliability of updates by using the reliable transport services of TCP.
C. The network command with the mask option never insta lls a prefix into the BGP table unless there is a matching prefix exists in the IP route table.
D. A TCP connection is required before exchanging updates.
E. BGPuses notification and the update messages to establish and maintain the BGP neighbor relati onship.

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