题目内容（请给出正确答案）

[单选题]

An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL？（）

A.FTP

B.Telnet

C.SMTP

D.DNS

E.HTTP

F.POP3

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更多“An inbound access list has bee…”相关的问题

第1题

WhichstatementiscorrectaboutthenumberofavailableQoSsystemclassesinFCoE?()

A.It’shard-setandcannotbedisabled

B.It’sconfigurable，withanupperlimitof16

C.It’shard-setbutcannotdisablebest-effortandFibreChannel

D.It’shard-setbutcandisableallbutoneclass

E.It’sconfigurablewithanupperlimitofeight

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第2题

AccordingtoRFC3931,L2TPv3utilizestheIANAassignedIPprotocolIDof().

A.121

B.115

C.110

D.101

E.151

F.51

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第3题

Given the address 192.168.20.19/28, which of the following are valid host addresses on this subnet?()

A.192.168.20.29

B.192.168.20.16

C.192.168.20.17

D.192.168.20.31

E.192.168.20.0

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第4题

BasedonthefollowingoutputinarouterArunningLDP,whichstatementistrue?()

A.Noneoftheabove.

B.TheIPaddress50.0.0.1/32isassignedtothenon-directlyconnectedLDPneighbor，50.0.0.4.

C.TheIPaddress50.0.0.1/32isassignedtooneofitsowninterfaces.

D.TheIPaddress50.0.0.1/32isassignedtoitsdirectlyconnectedLDPneighbor，50.0.0.4.

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第5题

Use the output from the router shown in the graphic above to determine which of the following are correct.()

A. Router John uses a link-state routing protocol.

B. Router John will receive routing updates on the Serial0/0 interface.

C. Router John will receive routing updates on the Serial0/1 interface.

D. Router John will send routing updates out the Serial0/0 interface.

E. Router John will send routing updates out the FastEthernet0/0 interface.

F. Router John will send routing updates out the Serial0/1 interface.

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第6题

TheVLANsinswitchR1arebeingmodified.WhichofthefollowingareupdatedinR1everytimeaVLANismodified?()

A.Configurationrevisionnumber

B.Configurationrevisionflagfield

C.Configurationrevisionresetswitch

D.Configurationrevisiondatabase

E.Noneoftheotheralternativesapply

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第7题

网络中有思科和非思科设备,运行PIMv2,如何选举RP?

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第8题

Which of the following statements describe the network shown in the graphic?()

A. There are two broadcast domains in the network.

B. There are four broadcast domains in the network.

C. There are six broadcast domains in the network.

D. There are four collision domains in the network.

E. There are five collision domains in the network.

F. There are seven collision domains in the network.

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第9题

Whichofthefollowingarestepstoconfiguredestination-basedRemoteTriggeredBlackHole(RTBH)filtering?()

A.ConfigureOSPFbetweentriggerrouterandblackholeroutes

B.Configurealledgerouterswithstatic（reserved）hostroutetoNull0

C.ConfigureBGPbeteentriggerandblackholerouters

D.Configureontriggerroutertoadvertisevictimhostroutewithcommumity

E.ActivateblackholebyredistributingrouteforvictimintoBGPwithnext-hopsettothestatic（reserved）hostrouteconfiguredonedgerouters

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第10题

YouareassigningVLANstotheportsofswitchR1.WhatVLANnumbervalueisanassignedtothedefaultVLAN?()

A.VLAN1003

B.VLAN1

C.VLANON

D.VLANA

E.VLAN0

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