单项选择题How is authentication handled with OSPFv3?()

A. OSPFv3 for IPv6 authen tication is supported by IPv6 IPsec.
B. OSPFv3 for IPv6 authentication is supported by MD5 authentication.
C. OSPFv3 for IPv6 authentication is supported by IPv4 IPsec.
D. OSPFv3 for IPv6 authentication is supported by SHA - 1 authentication.


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1.单项选择题What is the difference between the IPv6 addresses ::/0 and :: /128? ()

A. ::/0 is the default route, and ::/128 is the unspecified address.
B. ::/0 is the unicast address, and ::/128 is the anycast address.
C. ::/0 is the anycast address, and ::/128 is the multicast address.
D. ::/0 is the unicast address, and ::/12 8 is the multicast address.
E. ::/0 is the unspecified address, and ::/128 is the multicast address.
F. ::/0 is the anycast address, and ::/128 is the default address.

2.多项选择题What are two rules for compacting IPv6 addresses?()

A. Every 16 - bit segment segment that consists of all zeroes can be represented with a single colon.
B. The trailing zeroes in any 16 - bit  segment do not have to be written.
C. The leading zeroes in any 16 - bit segment do not have to be written.
D. Any single, continuous string of one or more 16 - bit segments that consists of all zeroes can be represented with a double colon.
E. The maximum number of times a double colon can replace a 16 - bit segment that consists of all zeroes is two.
F. Two zeroes in the middle of any 16 -bit segment do not have to be written.

3.多项选择题What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network when using the "show ip bgp" c ommand?()

A. The network was originated via redistribution of an interior gateway protocol into BGP.
B. The network was defined by a static route.
C. The network was learned via IBGP.
D. The network was learned via EBGP.
E. The network was  originated via a network or aggregate command.

4.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.

5.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.

6.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

8.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

9.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

10.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.

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