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

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


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1.單項選擇題Which set of commands is recommended to prevent the use of a hub in the access layer?（）

A.switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1
B.switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1
C.switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1
D.switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1

2.單項選擇題

Refer to the exhibit.The user at Workstation B reports that Server A cannot be reached.What is 
preventing Workstation B from reaching Server A？（）

A.The IP address for Server A is a broadcast address.
B.The IP address for Workstation B is a subnet address.
C.The gateway for Workstation B is not on the same subnet.
D.The gateway for Server A is not on the same subnet.

3.多項選擇題Which two statements about the configuration of the switch interface are correct (Choose two)（）。

A.The switchport belongs only to VLAN 2
B.Interface fa0/0 will be in both VLAN 1 (by default) and VLAN 2
C.The exhibit shows interface fa0/0 to be dynamically mapped to VLAN 2
D.A network host can be connected to this interface

4.單項選擇題


What is the under lying cause of this problem？（）
 

A. A remote physical layer problem exists.
B. The host NIC is not functioning.
C. TCP/IP has not been correctly installed on the host.
D. A local physical layer problem exists.

5.單項選擇題For which type of connection should a straight-through cable be used?（）

A.switch to switch
B.switch to hub
C.switch to router
D.hub to hub
E.router to PC

6.多項選擇題Which of the following correctly describe steps in the OSI data encapsulation process?（）

A.The transport layer divides a data stream into segments and may add reliability and flow control information.
B.The data link layer adds physical source and destination addresses and an FCS to the segment.
C.Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D.Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E.The presentation layer translates bits into voltages for transmission across the physical link.

7.多項選擇題Which three of these statements regarding 802.1Q trunking are correct? （）

A.802.1Q native VLAN frames are untagged by default.
B.802.1Q trunking ports can also be secure ports.
C.802.1Q trunks can use 10 Mb/s Ethernet interfaces.
D.802.1Q trunks require full-duplex, point-to-point connectivity.
E.802.1Q trunks should have native VLANs that are the same at both ends.

8.多項選擇題Which two of these are characteristics of the 802.1Q protocol？（）

A.it is a layer 2 messaging protocol which maintains vlan configurations across network.
B.it includes an 8-bit field which specifies the priority of a frame.
C.it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.
D.it modifies the 802.3 frame header，and thus requires that the FCS be recomputed.
E.it is a trunking protocol capable of carring untagged frames.

10.多項選擇題Which two of these statements regarding RSTP are correct? （）

A.RSTP cannot operate with PVST+.
B.RSTP defines new port roles.
C.RSTP defines no new port states.
D.RSTP is a proprietary implementation of IEEE 802.1D STP.
E.RSTP is compatible with the original IEEE 802.1D STP.

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