单选题You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation. How many designated routers are present for this link?（）A0B1C2D3
单选题
You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation. How many designated routers are present for this link?（）
A
0
B
1
C
2
D
3
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相关考题：
You are running OSPF between two ERX Edge Routers across an OC－12c link with HDLC encapsulation.How many designated routers are present for this link?() A.0B.1C.2D.3
What are the three OSPF authentication methods supported on the ERX Edge Router?() A.AB.BC.CD.DE.E
Which of the following must match for two directly connected routers running OSPF to establish a neighbor adjacency?() A. area IDsB. process IDsC. router IDsD. hello timers
You have implemented mutual route redistribution between OSPF and EIGRP on a border router. When checking the routing table on one o f the OSPF routers within the OSPF routing domain, you are seeing some, but not all of the expected routes.Which two things should you verify to troubleshoot this problem?（）A. The border router is using a proper seed metric for OSPFB. The border ro uter is using a proper seed metric for EIGRPC. The administrative distance is set for OSPF and EIGRPD. The missing EIGRP routes are present in the routing table of the border routerE. The subnet keyword on the border router in the redistribute EIG RP command
You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds.What could be the cause of this problem?（）A. OSPF authentication errors between some of the routersB. Two routers have the same OSPF router IDC. Issues with mistuned OSPF timersD. OSPF LSA pacing issues between some of the routersE. OSPF neighbor adjacency problems between some of the routers
Refer to the exhibit. You have completed an OSPF implementation, and you are verifying OSPF operation. You notice that router A and router B are stuck in the two - way state. From the show ip ospf interface command output, what is the cause of this issue?（）A. All OSPF implementations must have at le ast one interface in area 0.B. You are attempting to run in the broadcast mode over an NBMA interface.C. Both routers are configured to function as a BDR; therefore, there is no DR router.D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.
If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor linkB、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchangedC、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor doorD、A SHAM link is part of OSPF network of MPLS-VPN provider
Which statement is correct about an OSPF sham-link？（）A、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.B、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.C、A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.D、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.E、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）A、If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistributionB、If using IS-IS as the PE-CE routing protocol, no redistribution is requiredC、If using static routes between the CE and PE routers, no redistribution of other VPN routes is requiredD、If PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required
Which of the following describe the process identifier that is used to run OSPF on a router (Choose two.)（）。A、It is locally significantB、It is globally significantC、It is needed to identify a unique instance of an OSPF databaseD、It is an optional parameter required only if multiple OSPF processes are running on the routerE、All routers in the same OSPF area must have the same process ID if they are to exchange routing information
Half of your network uses RIPv2 and the other half runs OSPF. The networks do not communicate with each other. Which two of these factors describe the impact of activating EIGRP over each separate part？ （）A、EIGRP will not be accepted when configured on the actual RIPv2 routers.B、OSPF will no longer be used in the routing table， because you only have EIGRP internal routes running.C、OSPF will no longer be used in the routing table， because you only have EIGRP external routes running.D、RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP external routes running.E、RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP internal routes running.F、OSPF database will have RIPv2 routes.
You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds. What could be the cause of this problem?（）A、OSPF authentication errors between some of the routersB、Two routers have the same OSPF router IDC、Issues with mistuned OSPF timersD、OSPF LSA pacing issues between some of the routersE、OSPF neighbor adjacency problems between some of the routers
You have implemented mutual route redistribution between OSPF and EIGRP on a border router. When checking the routing table on one o f the OSPF routers within the OSPF routing domain, you are seeing some, but not all of the expected routes. Which two things should you verify to troubleshoot this problem?（）A、The border router is using a proper seed metric for OSPFB、The border ro uter is using a proper seed metric for EIGRPC、The administrative distance is set for OSPF and EIGRPD、The missing EIGRP routes are present in the routing table of the border routerE、The subnet keyword on the border router in the redistribute EIG RP command
You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation. How many designated routers are present for this link?（）A、0B、1C、2D、3
The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。A、It provides dynamic neighbor discovery.B、It detects unreachable neighbors in 90 second intervals.C、It maintains neighbor relationships.D、It negotiates correctness parameters between neighboring interfaces.E、Ituses timers to elect the router with the fastest links as the designated router.F、It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
You have a Bridged 1483 service offering where each ATM PVC is assigned a /30 subnet. What are two characteristics of this configuration？（）A、It burns IP addresses.B、It conserves IP addresses.C、Both the client and the ERX Edge Router have IP addresses.D、The client has an IP address， but the ERX Edge Router uses an unnumbered address.
When troubleshooting an EIGRP connectivity problem, you notice that two connected EIGRP routers are not becoming EIGRP neighbors. A ping between the two routers was successful.What is the next thing that should be checked?（）A、Verify that the EIGRP hello and hold timers match exactly.B、Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP peer command.C、Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP traffic command.D、Verify that EIGRP is enabled for the appropriate networks on the local and neighboring router.
Routers A and B have an OC12c and a GE link between them and are running OSPF over both of these links.Which item is correct， assuming the default JUNOS software OSPF metric calculation？（）A、There are two equal cost paths between A and BB、The GE link is the preferred path between A and BC、The OC12c link is the preferred path between A and BD、Manual metric assignment must be configured to determine the outcome.
单选题You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation. How many designated routers are present for this link?（）A0B1C2D3
单选题You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds. What could be the cause of this problem?（）AOSPF authentication errors between some of the routersBTwo routers have the same OSPF router IDCIssues with mistuned OSPF timersDOSPF LSA pacing issues between some of the routersEOSPF neighbor adjacency problems between some of the routers
多选题The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。AIt provides dynamic neighbor discovery.BIt detects unreachable neighbors in 90 second intervals.CIt maintains neighbor relationships.DIt negotiates correctness parameters between neighboring interfaces.EItuses timers to elect the router with the fastest links as the designated router.FIt broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
多选题Which of the following describe the process identifier that is used to run OSPF on a router (Choose two.)（）。AIt is locally significantBIt is globally significantCIt is needed to identify a unique instance of an OSPF databaseDIt is an optional parameter required only if multiple OSPF processes are running on the routerEAll routers in the same OSPF area must have the same process ID if they are to exchange routing information
单选题Which statement is correct about an OSPF sham-link？（）AA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.BA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.CA sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.DA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.EA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
多选题You have a Bridged 1483 service offering where each ATM PVC is assigned a /30 subnet. What are two characteristics of this configuration？（）AIt burns IP addresses.BIt conserves IP addresses.CBoth the client and the ERX Edge Router have IP addresses.DThe client has an IP address， but the ERX Edge Router uses an unnumbered address.
多选题If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）AA sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor linkBA sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchangedCA SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor doorDA SHAM link is part of OSPF network of MPLS-VPN provider
多选题Which of the following must match for two directly connected routers running OSPF to establish a neighbor adjacency?（）Aarea IDsBprocess IDsCrouter IDsDhello timers
单选题When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）AIf using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistributionBIf using IS-IS as the PE-CE routing protocol, no redistribution is requiredCIf using static routes between the CE and PE routers, no redistribution of other VPN routes is requiredDIf PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required