多选题Which two BGP attributes support route reflection?（）AClient IDBCluster listCOriginator IDDReflection community

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第4题：

BGP best route selection process is based on path attributes.（）

• A、True
• B、False

正确答案:A

第5题：

Which three attributes are advertised to the remote PE and BGP-based VPNs？（）

• A、Circuit ID
• B、VPN label
• C、Route target
• D、VPN number
• E、Route distinguisher

正确答案:B,C,E

第6题：

Which two reflect best practices for client peering sessions in a BGP route reflection network? （）(Choose two.)

• A、peer with route-reflectors within the cluster
• B、peer with route-reflectors outside the cluster
• C、peer with route-reflector-clients within the cluster
• D、peer with route-reflector-clients outside the cluste

正确答案:A,C

第7题：

Which statement describes the purpose of BGP route damping?（）

• A、Avoid interface bandwidth saturation.
• B、Drop BGP routes when the routing-table becomes full.
• C、Remove unnecessary route attributes when not in use.
• D、Limit the effects of a flaping interface on route removal and readvertisement.

正确答案:D

第8题：

What are two purposes of the AS_PATH attribute?（）

• A、route selection
• B、loop avoidance
• C、determining equal cost paths for reachablilty
• D、defining the application of other BGP attributes

正确答案:A,B

第9题：

What are two uses of the AS Path attribute?（） (Choose two.)

• A、route selection
• B、loop avoidance
• C、determining equal cost paths for reachablilty
• D、defining the application of other BGP attributes

正确答案:A,B

第10题：

Which action occurs when the BGP route 20.1.0.0/16 is evaluated by the policy expression？（） [editpolicy-options]  policy-statementmy-filter {  term-first{  from{  route-filter192.168.0.0/16orlongeraccept；  route-filter 192.168.1.0/24 exact accept；  route-filter 192.168.2.0/24 exact；  }  then{  metric10；  accept；  }  termsecond {  then{  metric20；  accept；  }}  policy-statementmain {  termchange-attributes  from{  policymy-filter；  }  thenaccept；  }  termdefault {  thenreject；  }}  [editprotocols]  bgp{  exportmain；  }

• A、The route is not advertised into BGP
• B、The route is advertised into BGP with metric 10.
• C、The route is advertised into BGP with metric 20.
• D、The route is advertised into BGP with default metric.

正确答案:D

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第15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16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17题：

what’s the role of community attribute in the bgp route？

正确答案: BGP communitiy can be used to as tag of a set of routes. Those tags can be used for applying specific routing policy for a group of routes.
There are four well-known communities：
Internet：all route belongs to this community by default and is advertised freely.
No-export：routes belong to the community cannot be advertised to EBGP peer.
No-advertise：routes belong to the community cannot be advertised to any BGP peer.
Local-as：routes belong to the community cannot be advertised to eBGP peer，or if confederation is used，routes cannot be advertised to conferation eBGP peer and normal eBGP peer.

第18题：

Which two BGP attributes support route reflection？（）

• A、Client ID
• B、Cluster list
• C、Originator ID
• D、Reflection community

正确答案:B,C

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.

正确答案:B

第20题：

You receive an EBGP route configured with the no-export community set.To which types of peers can you send this route?（） (Choose two.)

• A、no BGP peers
• B、all I-BGP peers
• C、all E-BGP peers within your global AS
• D、all E-BGP peers outside your global AS

正确答案:B,C

第21题：

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

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

正确答案:D

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