單項(xiàng)選擇題

Refer to the exhibit.HostA cannot ping HostB.Assuming routing is properly configured,what could be thecause of this problem?()

A.HostA is not on the same subnet as its default gateway
B.The address of SwitchA is a subnet address
C.The Fa0/0 interface on RouterA is on a subnet that cannot be used
D.The serial interfaces of the routers are not on the same subnet
E.The Fa0/0 interface on RouterB is using a broadcast address


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2.單項(xiàng)選擇題A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?()

A.access-list 101 deny tcp 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23  access-list 101 permit ip any any
B.access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23  access-list 101 permit ip any any
C.access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21  access-list 1 permit ip any any
D.access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23  access-list 1 permit ip any any


3.單項(xiàng)選擇題Which spread spectrum technology does the 802.11b standard define foroperation?()

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR,F(xiàn)HSS,and DSSS

5.單項(xiàng)選擇題Refer to the exhibit,a network administrator cannot establish a telnet session with the indicated router.What is the cause of this failure?()

A.A level 5 password is not set
B.The vty password is missing
C.The console password is missing
D.An ACL is blocking Telnet access

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