Which command clears the history of BGP damped routes?（）A、clear bgp dampingB、clear bgp neighborC、clear bgp neighbor dampD、clear protocol bgp damp

第1题：

第2题：

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第4题：

clear ip bgp *，该指令的作用是（）。

• A、重建所有的BGP连接
• B、清除路由器表
• C、清除BGP路由器表
• D、重新启动路由器

正确答案:A

第5题：

clear ip bgp * soft会让路由器引发什么？

正确答案:when the command is used，the router is sending updates to all BGP neighbors and also applying inbound policies using the stored updates from all BGP neighbors without tearing down existing peering sessions.

第6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

正确答案:A

第7题：

A router is running BGP and receives more than one route for a particular prefix. Assume all the routes for this prefix have the same attributes. Which three path features would be reasons be for the rou ter to ignore some of the routes and not consider them as candidates for the best path?（）

• A、paths from an internal BGP (iBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
• B、paths for which the NEXT_HOP is inaccess ible
• C、paths from an external BGP (eBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
• D、paths for which the NEXT_HOP is accessible
• E、paths that are marked as synchronized in the show ip bgp output
• F、paths that are marked as  not synchronized in the show ip bgp output

正确答案:B,C,F

第8题：

Which JUNOS software show command allows you to view BGP attributes for a given route?（）

• A、show route bgp
• B、show route extensive
• C、show bgp attribute
• D、show bgp neighbor

正确答案:B

第9题：

Which keyword is used with the show ip bgp neighbors [keyword] command to display all routes that are received and accepted from a neighbor?（）

• A、paths
• B、accepted-routes
• C、advertised-routes
• D、routes

正确答案:D

第10题：

When implementing BGP confederations, which configuration command establishes the globally unique AS number used with external peers outside your network?（）

• A、bgp confederation as
• B、bgp confederation system
• C、bgp confederation remote-as
• D、bgp confederation identifier

正确答案:D

第11题：

Which choice describes the JUNOS software default policy action for BGP routes？（）

• A、IBGP peers
• B、EBGP peers
• C、Active BGP peers
• D、Established BGP peers

正确答案:B

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第15题：

Which of the following commands causes a router to bring down BGP neighbor relationships?（）

• A、clear ip bgp *
• B、clear ip bgp 1.1.1.1
• C、clear ip bgp * soft
• D、clear ip bgp 1.1.1.1 out

正确答案:A,B

第16题：

Which command displays only those entries in a BGP table with specific AS_PATH attributes?（）

• A、show ip bgp inconsistent-as
• B、show ip bgp paths
• C、show ip bgp community-list
• D、show ip bgp regexp

正确答案:D

第17题：

Which two statements about the bgp deterministic-med and bgp always-compare-med commands are true？（）

• A、The bgp deterministic-med command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS path length
• B、The bgp always-compare command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS path system
• C、Enabling the bgp deterministic-med command ensures the comparison of the MED variable when choosing routes advertised by different peers in the same autonomous system.
• D、Enabling the bgp always-compare-med command ensures the comparison of the MED variable for paths from neighbors in different autonomous systems.
• E、The bgp deterministic-med and bgp always-compare-med commands are enabled by defult.

正确答案:C,D

第18题：

Which of the following three BGP filtering methods enabled with the neighbor command  will filter BGP prefixes based on the prefix and prefix length？（）

• A、A neighbor distribute - list out command, referencing a standard ACL
• B、A neighbor prefix - list out command
• C、A neighbor filter - list out command
• D、A neighbor distribute - list  out command, referencing an extended ACL
• E、A neighbor route - map out command

正确答案:B,D,E

第19题：

Which command clears the history BGP damped routes？（）

• A、clear bgp damping
• B、clear bgp neighbor
• C、clear bgp neighbor damp
• D、clear protocol bgp damp

正确答案:A

第20题：

哪个命令使你能看到import policy应用在BGP相邻体的效果（）

• A、show route protocol bgp  
• B、show route protocol bgp next-hop address   
• C、show route protocol bgp export-policy   
• D、show route advertising-protocol bgp neighbor-address

正确答案:A

第21题：

R1 is currently advertising prefixes 1.0.0.0/8, 2.0.0.0/8, and 3.0.0.0/8 over its eBGP connection to neighbor 2.2.2.2 (R2). An engineer configures a prefix list (fred) on R1 that permits only 2.0.0.0/8 and then enables the filter with the neighbor R2 prefix- list fred out command. Upon exiting configuration mode, the engineer uses some show commands on R1, but no other commands. Which of the following is true in this case?（）

• A、The show ip bgp neighbor 2 .2.2.2 received -routes command lists the three original prefixes.
• B、The show ip bgp neighbor 2.2.2.2 advertised - routes command lists the three original prefixes.
• C、The show ip bgp neighbor 2.2.2.2 routes command lists the three original prefixes.
• D、T he show ip bgp neighbor 2.2.2.2 routes command lists only 2.0.0.0/8.
• E、The show ip bgp neighbor 2.2.2.2 advertised - routes command lists only 2.0.0.0/8.

正确答案:B

第22题：

Which setting in JUNOS software forces a bgp speaker to wait for a bgp neighbor to initiate a bgp session?（）

• A、wait
• B、hold
• C、passive
• D、authenticate

正确答案:C

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