CMS专题

单选题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 th

题目
单选题
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.

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相似问题和答案

第1题：

Which statement is correct about the forwarding table?()

A. The forwarding table is stored only on the PFE

B. The forwarding table contains all known routes

C. The forwarding table is stored on both the RE and PFE

D. The forwarding table is stored only on the RE


参考答案：C

第2题：

Which three statements are correct about the differences in IS － IS and OSPF?()

A. IS - IS is more CPU - intensive than is OSPF

B. For greater fine tuning there are more IS - IS timers

C. IS - IS LSP con tains TLV fields and OSPF LSU contains the LSAs

D. New additions to the protocol are easily implemented in OSPF but not with IS - IS

E. OSPF has more area types than does IS - IS


参考答案：B, C, E

第3题：

Which statement is correct about the policy shown in the exhibit?()

A. All routes are accepted.

B. All routes are rejected.

C. A 172.27.0.0/24 route will be accepted.

D. A 172.27.0.0/16 route will be accepted.


参考答案：B

第4题：

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.

正确答案:B

第5题：

Refer to the exhibit. Which statement is true about the configuration? ()

A. RTA will not establish an OSPF adjacency w ith RTB

B. RTA will send OSPF hello packets, but will not send OSPF updates

C. RTA will not accept OSPF hello packets from RTB

D. RTA will send OSPF updates, but will not establish an adjacency with RTB


参考答案：A

第6题：

Which statement is correct about a Routing Policy term?()

A.A term must contain a "from" statement.

B.A term acts like "if" and "then" statements.

C.The most specific term has precedence.

D.Terms can be written in any order to achieve the same behavior.


参考答案：B

第7题：

Refer to the exhibit. Router C was configured so that it could form an adja cency with three OSPF neighbors, one connected to each of its three physical interfaces. Which statement is correct about router C?（）

A. It is configured and functioning correctly as an OSPF internal router.

B. It is configured and functioning correc tly as an ABR attached to stub area 4.

C. It is configured and functioning correctly as an ASBR attached to external area 4.

D. It is configured and functioning correctly as an ABR attached to totally stubby area 4.

E. It is not configured correctly to function as specified.


参考答案：D

第8题：

Which statement is true about the frequency of OSPF LSA transmissions?()

A.A

B.B

C.C

D.D


参考答案：D

第9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？（）

  • A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor link
  • B、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchanged
  • C、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor door
  • D、A SHAM link is part of OSPF network of MPLS-VPN provider

正确答案:A,B

第10题：

A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

  • A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
  • B、For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
  • C、Direct inter-vlan communication does not require OSPF
  • D、OSPF cannot be used if router-on-a-stick is configured on the router

正确答案:C

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