单选题A BGP connection is being established.What happens if the local router and the peer router do NOT have the same hold-time value configured?（）A The BGP session does not establish.B The hold time is assumed to be infinite.C The larger of the two hold-tim

第1题：

第2题：

Two routers configured to run BGP have been connected to a firewall， one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer， including the correctBGP session endpoint addresses and the correct BGP session hop-count limit EBGP multihop. What is agood first test to see if BGP will work across the firewall？（）

• A、Attempt to TELNET from the router connected to the inside of the firewall to the router connected to theoutside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transportdata.
• B、Ping from the router connected to the inside interface of the firewall to the router connected to theoutside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP totransport packets.
• C、There is no way to make BGP work across a firewall without special configuration， so there is no simpletest that will show you if BGP will work or not， other than trying to start the peering session.
• D、There is no way to make BGP work across a firewall.

第3题：

When BGP is used as the PE-CE routing protocol, which of these statements is correct?（）

• A、On the CE router, PE neighbors must be configured in the VRF context on the CE router
• B、On PE routers, the CE IBGP neighbors are configured in the global BGP configuration
• C、On PE routers, the CE EBGP neighbors are configured in the VRF context
• D、A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbors

第4题：

Two routers configured to run BGP have been connected to a firewall， one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer， including the correct BGP session endpoint addresses and the correct BGP session hop-count limit （EBGP multihop）. What is a good first test to see if BGP will work across the firewall？（）

• A、Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transport data.
• B、Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP to transport packets.
• C、There is no way to make BGP work across a firewall without special configuration， so there is no simple test that will show you if BGP will work or not， other than trying to start the peering session.
• D、There is no way to make BGP work across a firewall.

第5题：

Two routers configured to run BGP have been connected to a firewall，one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer，including the correct BGP session endpoint addresses and the correct BGP session hop-count limit （EBGP multihop）. What is a good first test to see if BGP will work across the firewall？（）

• A、Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall.If telnet works，BGP will work，since telnet and BGP both use TCP to transport data
• B、Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall.If you can ping between them，BGP should work，since BGP uses IP to transport packets
• C、There is no way to make BGP work across a firewall without special configuration，so there is no simple test that will show you if BGP will work or not，other than trying to start the peering session
• D、There is no way to make BGP work across a firewall

第6题：

Router R-1 is configured for BGP routing as shown below： router bgp 65300network 27.0.0.0neighbor 192.23.1.1 remote-as 65300 From the perspective of router R-1， what kind of router is the router with IP address 192.23.1.1？（）

• A、A peer router running IBGP
• B、A peer router running EBGP
• C、A community member running IBGP
• D、A peer group member running IBGP
• E、A peer group member running EBGP

第7题：

A BGP router is configured with bgp dampening 8 300 1500 20 route-map 1 .What does the value of 20 represent?（）

• A、reuse
• B、suppress
• C、half-life
• D、max-suppress-time

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第13题：

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

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

第14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15题：

A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight an d local preference values. Which statement is true about how BGP would select the best path?（）

• A、To influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local - preference 50
• B、Th e router will prefer the shortest autonomous system path
• C、If the command bgp always - compare - med has been given, then the router will prefer the route with the highest MED
• D、The router will prefer the route with the lower MED

第16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17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.

第18题：

A BGP connection is being established.What happens if the local router and the peer router do NOT have the same hold-time value configured?（）

• A、The BGP session does not establish.
• B、The hold time is assumed to be infinite.
• C、The larger of the two hold-time values is used.
• D、The smaller of the two hold-time values is used.

第19题：

What is the first step in BGP route selection?（）

• A、The local router prefers the route with the shortest AS Path.
• B、The local router verifies that it has a route to the BGP Next Hop IP address.
• C、The local router prefers the route from the peer with the lowest peer ID address.
• D、The local router prefers the route learned from an EBGP peer over a route learned from an IBGP peer.

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