In BGP routing，what does the rule of synchronization mean？（）A、A BGP router can only advertise an EBGP learned route，provided that the route is an IGP route in the routing table.B、A BGP router can only advertise an IBGP learned route，provided that the rout

第1题：

What is the most likely reason that an IBGP route that has been selected as a best route is not entered into the IP routing table?（）

• A、Route reflectors are not passing updates properly.
• B、BGP synchronization has been enabled.
• C、The next-hop address is unreachable.
• D、No loopback interface has been configured on a router.

第2题：

Router R1, in ASN 11, learns a BGP route from BGP peer R22 in ASN 22. R1 and then uses BGP to advertise the route to R2, also in ASN 11. What ASNs would you see in the BGP table on R2 for this route?（）

• A、22
• B、11
• C、1
• D、None

第3题：

A company has a BGP network and a BGP route of 196.27.125.0/24 that should be propagated toall of the devices. The route is not now in any of the routing tables. The administrator determinesthat an access list is the cause of the problem. The administrator changes the access list to allowthis route， but the route still does not appear in any of the routing tables. What should be done topropagate this route？（）

• A、Clear the BGP session
• B、Change both the inbound and outbound policy related to this route
• C、Use the service-policy command to adjust the QOS policy to allow the route to propagate
• D、Use the release BGP routing command

第4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5题：

Which three statements about the route target （RT） are true？ （）

• A、The RT is a BGP extended community.
• B、The RT is an 8-byte field that is prefixed to an IPv4 address to make it a unique VPNv4 address.
• C、When a VPN route that is learned from a CE router is injected into BGP， one or more RTs are associated with it
• D、The distribution of VPN routing information is controlled through the use of VPN RTs
• E、When a VPN route that is learned from a CE router is injected into BGP， there is always one RT that is associated with it.

第6题：

What is the BGP synchronization rule？（）

• A、Routing information received through an IBGP session is not forwarded to another IBGP neighbor， onlyto EBGP neighbors
• B、Routing information received through an EBGP session is not forwarded to another EBGP neighbor，only to IBGP neighbors
• C、BGP neighbor peerings are established and sychronized using the TCP 3-way handshake
• D、BGP shall not advertise a route until that route has been learned via an IGP also

第7题：

By default， to which peers will a BGP router advertise routes learned from IBGP peers？（）

• A、all BGP peers
• B、all IBGP peers
• C、all EBGP peers
• D、all MBGP peers

第8题：

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

• A、The local router prefers the route with the shortest as-path.
• B、The router first 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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第13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14题：

For which routes does LDP advertise a label binding？（）

• A、all routes in the routing table
• B、only the IGP and BGP routes in the routing table
• C、only the BGP routes in the routing table
• D、only the IGP routes in the routing table

第15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16题：

What action will a BGP route reflector take when it receives a prefix marked with the community attribute NO ADVERTISE from a client peer？（）

• A、It will advertise the prefix to all other client peers and non-client peers.
• B、It will not advertise the prefix to EBGP peers.
• C、It will only advertise the prefix to all other IBGP peers.
• D、It will not advertise the prefix to any peers.

第17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 network statements 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18题：

BGP route dampening is configured on a BGP router. Whose routing behavior is affected by this configuration?（）

• A、upstream EBGP neighbors
• B、downstream EBGP neighbors
• C、upstream IBGP neighbors learned by IBGP peers
• D、downstream IBGP neighbors learned by IBGP peers

第19题：

Which action occurs when the policy main-policy evaluates the BGP route 10.0.55.2/32？（） [edit policy-options]  policy-statement test { from {  route-filter10.0.0.016/orlongeraccept；  route-filter10.0.67.0/24orlangerreject；  route-filter10.0.0.0/8orlanger；  }  then {  metric10；  community add no-advertise；  accept；  }  }  policy-statement main-policy {  term only-want-certain-routes {  from {  policytest；  }  then {  communityadd harry-402；  accept；  }  }  }  communityno advertise members no-advertise；  communityharry-402 members 666：402；  [edit protocols]  bgp {  exportmain-policy； }

• A、The route is not advertised into BGP
• B、The route is advertised into BGP with community harry-402.
• C、The route is advertised into BGP with community no-advertise.
• D、The route is advertised into BGP with community harry-402 and no-advertise.

第20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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