Which types of prefixes will a router running BGP most likel

第1题：

第2题：

Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer？ （）

• A、 prefixes received from any other BGP peer and prefixes locally originated via networkstatements or redistributed to BGP
• B、 all prefixes in its IP routing table
• C、 only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
• D、 only prefixes received from EBGP peers and prefixes received from route reflectors
• E、 all prefixes in its routing table except the prefixes received from other EBGP peers
• F、 all prefixes in its routing table except the prefixes received from other IBGP peers

第3题：

第4题：

Router 1 is configured for BGP as dual-homed on the Cisco network. Which three BGP attributes are carried in every BGP update on this router （both IBGP and EBGP）？（）

• A、origin
• B、router-ID
• C、AS-path
• D、local-preference
• E、next-hop

第5题：

Which two options does Cisco PfR use to control the entrance link selection with inbound  optimization？（）

• A、Prepend extra AS hops to the BGP prefix.
• B、Advertise more specific BGP prefixes（longer mask）.
• C、Add（prepend）one or more communities to the prefix that is advertised by BGP.
• D、Have BGP dampen the prefix.

第6题：

Which of the following answers is most true about the BGP Update message?（）

• A、It lists a set of path attributes, along with a list of prefixes that use those PAs
• B、It lists a prefix/length, plus the PA settings for that prefix
• C、It  lists withdrawn routes, but never in the same Update message as newly advertised routes
• D、A single Update message lists at most a single prefix/lengtH

第7题：

You have a router running BGP for the MPLS network and OSPF for the local LAN network at the sales office. A route is being learned from the MPLS network that also exists on the OSPF local network. It is important that the router chooses the local LAN route being learned from the downstream switch running OSPF rather than the upstream BGP neighbor. Also， if the local OSPF route goes away， the BGP route needs to be used. What should be configured to make sure that the router will choose the LAN network as the preferred path？（）

• A、static route needs to be added
• B、floating static route needs to be added
• C、bgp backdoor command
• D、ospf backdoor command

第8题：

第9题：

Which types of prefixes will a router running BGP most likely advertise to an IBGP peer， assuming it is not configured as a route reflector？（）

• A、prefixes received from any other BGP peer and prefixes locally originated via networkstatements or redistributed
• B、all prefixes in its routing table
• C、prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
• D、prefixes received from EBGP peers and prefixes received from route reflectors
• E、prefixes received from other IBGP peers， prefixes received from EBGP peers，and prefixes redistributed to BGP
• F、prefixes received from other IBGP peers and prefixes received from route reflectors

第10题：

In which two ways does the BGP graceful capability preserve prefix information during a restart？（）

• A、The peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables.
• B、The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates.
• C、The peer router sends an end-of-RIB message to the restarting router.
• D、The restarting router removes any stale prefixes after the timer for stale entries expires.
• E、The restarting router does not remove any stale prefixes after the timer for stale entries expires.