what is ASBR？
what is ASBR？
相关考题：
The following output exists on Router R1, a router internal to area 1. What can you d etermine as true from the output of the show ip ospf database summary command?() A. The LSA was created by an ABR due to an area range command.B. The LSA was created by an ASBR due to a summary - address command.C. If cr eated by an area range command, the best metric for a subordinate subnet on that ABR must have been 11.D. None of the other answers is correct.
Refer to the exhibit. The partial configuration for an OSPF ASBR and an Area 0 ABR is shown. Assume the OSPF configurations throughout the network are operable. Which statement about these configurations is true? （）A. The ASBR route - maps are basically useless, because there are no deny prefix - lists.B. LSA Type 5s wil l not be received by the ABR from the ASBR.C. The OSPF backbone will not learn any RFC 1918 addresses.D. The matched prefix - list addresses will be given a metric of 255, which is essentially unreachable.
在OSPF网络中,对于自治系统边界路由器ASBR,下列描述正确的是(). A.ASBR是那些将其它路由协议发现的路由引入到OSPF中的路由器B.ASBR不一定要位于AS的边界，而是可以在自治系统中的任何位置（Stub区除外）C.ABR不可能同时为ASBRD.ASBR必须连接两个OSPF区域
What best describes the usage of Route-Target rewrite？（）A、Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the PErouter in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.B、Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the route-Reflector in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.C、Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.D、None of the above.
Which statement about OSPF ASBR summary LSA is true？（）A、It is generated by an ASBR and indicates the reachability to an ABR located in another area.B、It is generated by ABR and indicates the reachability to an ASBR located in another AS.C、It is generated by ABR and indicates reachability to itself.D、It is generated by ABR and indicates the reachability to an ASBR located in another area.E、It is generated by ASBR and indicates the reachability to an ABR.
The OSPF External LSA for prefix x.x.x.x exists in the OSPF database， but the prefix is not installed in therouting table. Which are possible explanations？（）A、Inbound distribute-list is configured under the ospf process and it is denying x.x.x.xB、ASBR origination the LSA is not reachableC、Route to the Forwarding Address in not an internal OSPF routeD、Route to the Forwarding Address is an internal OSPF routeE、Route to the ASBR does not follow the same path as the one to the Forwarding Address
Which of the following LSA is the Type 10？（）A、Router LSAB、Opaque LSAC、AS attributes LSAD、ASBR summary LSAE、Network summary LSA
关于OSPF协议中的路由聚合，论述错误的有（）。A、ABR会自动聚合路由，无需手工配置B、只能在ABR上做聚合C、一台路由器同时做ABR和ASBR，它就不能聚合路由D、ASBR上能聚合任意的外部路由
在OSPF中，关于ABR和ASBR论述正确的有（）。A、ABR只负责传递区域内的路由，ASBR只负责传递AS外的路由B、ABR同时可以是ASBRC、区域0内可以有ASBRD、NSSA区域内可以有ASBR
如果在ASBR上，引入到OSPF的外部路由的下一跳在此OSPF路由域内，则相关AS-External-LSA的Forwarding Address应当被设置为（）。A、0.0.0.0B、此ASBR的RouterIDC、此ASBR所在区域的ABR的Router IDD、ASBR上此外部路由实际的下一跳
在OSPF网络中，对于自治系统边界路由器ASBR，下列描述正确的是（）.A、ASBR是那些将其它路由协议发现的路由引入到OSPF中的路由器B、ASBR不一定要位于AS的边界，而是可以在自治系统中的任何位置（Stub区除外）C、ABR不可能同时为ASBRD、ASBR必须连接两个OSPF区域
If two routers， both reachable from one another， originate functionally equivalent type 2 external- LSAs （i.e，same destination， cost and non-zero forwarding address ）， Which of the following statements wouldapply ？（）A、Two LSAs will exist in the network for this destination， and both will be usedB、Two LSAs will exist in the network for this destination， but only the one generated by the highest RID ASBR will be usedC、Only the LSA generated by the highest RID ASBR will exist in the networkD、Only the LSA generated by the lowest RID ASBR will exist in the network
单选题The ASBR-summary LSA is：（）.AGenerated by the ASBR and describes reachability to itselfBGenerated by the ASBR and describes reachabilty to the ABRCGenerated by the ABR and describes reachabilty to the ASBR for routers in a different area from the ASBRDGenerated by the ABR and describes reachabilty to the ASBR for routers in the same area with the ASBR
单选题Which statement about OSPF ASBR summary LSA is true？（）AIt is generated by an ASBR and indicates the reachability to an ABR located in another area.BIt is generated by ABR and indicates the reachability to an ASBR located in another AS.CIt is generated by ABR and indicates reachability to itself.DIt is generated by ABR and indicates the reachability to an ASBR located in another area.EIt is generated by ASBR and indicates the reachability to an ABR.
单选题What best describes the usage of Route-Target rewrite？（）ARoute-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the PErouter in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.BRoute-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the route-Reflector in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.CRoute-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.DNone of the above.
单选题What is the function of the Type 4 LSA?（）AAdvertise cost to the ABR.BSummarize external routes.CAdvertise cost to the ASBR.DReport a broadcast segment's DR
单选题关于OSPF的ASBR-Summary-LSA的信息描述，错误的是（）ALinkState表示ASBR的RouterIDBAdvertisingRouter表示该ABR的RouterIDC所有区域的ASBR-Summary-LSA中的AdvertisingRouter字段都相同DMetric表示该ABR到达ASBR的OSPF开销