單項(xiàng)選擇題Which layer of the OSI reference model uses the hardware address of a device to ensure message delivery to the proper host on a LAN?()

A. physical
B. data link
C. network
D. transport


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1.單項(xiàng)選擇題Which option is a valid IPv6 address?()

A. 2001:0000:130F::099a::12a
B. 2002:7654:A1AD:61:81AF:CCC1
C. FEC0:ABCD:WXYZ:0067::2A4
D. 2004:1:25A4:886F::1

2.單項(xiàng)選擇題What is known as "one-to-nearest" addressing in IPv6?()

A. global unicast
B. anycast
C. multicast
D. unspecified address

3.單項(xiàng)選擇題Which type of cable is used to connect the COM port of a host to the COM port of a router or switch?()

A. crossover
B. straight-through
C. rolled
D. shielded twisted-pair

4.單項(xiàng)選擇題Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?()

A. BackboneFast
B. UplinkFast
C. Root Guard
D. BPDU Guard
E. BPDU Filter

5.單項(xiàng)選擇題How many bits are contained in each field of an IPv6 address?()

A. 24
B. 4
C. 8
D. 16

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You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?()

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A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem?()Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

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Which statement describes the rule of split horizon?()

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Which command is used to display the collection of OSPF link states?()

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At which layer of the OSI model dose PPP perform?()

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On which options are standard access list based?()

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