题目内容（请给出正确答案）

[主观题]

What is the purpose of the OSPF router ID in a OR/BOR election？（）

A. It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network

B. It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router

C. It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network

D. It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

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更多“What is the purpose of the OSP…”相关的问题

第1题

You have completed an OSPF implementation, and you are verifying OSPF operation. During th

is 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 routers

B. Two routers have the same OSPF router ID

C. Issues with mistuned OSPF timers

D. OSPF LSA pacing issues between some of the routers

E. OSPF neighbor adjacency problems between some of the routers

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第2题

What is the function of the CSMA/CD algorithm in Ethernet technologies?（）

A. defines how the media is accessed

B. supplies a token to determine which host has access to the media

C. defines the encoding of electrical signals on the wire

D. determines the preamble bits

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第3题

What is the purpose of Spanning Tree Protocol?（）

A. to prevent routing loops

B. to create a default route

C. to provide multiple gateways for hosts

D. to maintain a loop-free Layer 2 network topology

E. to enhance the functions of SNMP

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第4题

Refertotheexhibit.Whatdoesthe"26"inthefirsttwohopoutputsindicate？（）

A.theouterlabelusedtodeterminethenexthop

B.theIPv4labelforthedestinationnetwork

C.theIPv4labelfortheforwardingrouter

D.theIPv4labelforthedestinationrouter

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第5题

When an OSPF design is planned, which implementation can help a router not have memory resource issues?（）

A. Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations

B. Have a backbo ne area (area 0) with 4 routers and 30,000 external routes injected into OSPF

C. Have less OSPF areas to reduce the need for interarea route summarizations

D. Have multiple OSPF processes on each OSPF router. Example, router ospf 1, router ospf 2

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第6题

WhichofthefollowingisnotinformationprovidedfromanIPphonetoaCatalystswitchusingCDP？（）

A.devicePoErequirements

B.deviceIPaddress

C.devicevoiceVLANID

D.deviceplatform

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第7题

WhichtwostatementsabouttheCiscoAutoSecurefeaturearetrue？（）

A.AllpasswordsenteredduringtheAutoSecureconfigurationmustbeaminimumof8charactersinlength.

B.Cisco123wouldbeavalidpasswordforboththeenablepasswordandtheenablesecretcommands.

C.TheautosecurecommandcanbeusedtosecuretherouterloginaswellastheNTPandSSHprotocols.

D.ForaninteractivefullsessionofAutoSecure，theautosecurelogincommandshouldbeused.

E.IftheSSHserverwasconfigured，the1024bitRSAkeysaregeneratedaftertheautosecurecommandisenabled.

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第8题

The maximum number of routers per OSPF area typically depends on which three factors?（）

A. the kind of OSPF areas being implemented

B. the number of external LSAs in the network

C. the number of DRs and BDRs in the areas

D. the number of virtual links in the areas

E. how well the areas can be summarized

F. the use of LSA filters

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第9题

WhichofthefollowingarefunctionsthatareoftenprovidedbyanITSPbutarenottypicallyprovidedbythePSTN？（）

A.QoS

B.callsetupandteardown

C.callrouting

D.callsupervision

E.audiosignalcompression

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第10题

You are troubleshooting an OSPF problem where external routes are not showing up in the OS

PF database. Which two options a re valid checks that should be performed first to verify proper OSPF operation?（）

A. Are the ASBRs trying to redistribute the external routes into a totally stubby area?

B. Are the ABRs configured with stubby areas?

C. Is the subnets keyword being used with the redistribution command?

D. Is backbone area (area 0) contiguous?

E. Is the CPU utilization of the routers high?

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