單項選擇題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


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

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

2.單項選擇題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

3.單項選擇題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.單項選擇題A system administrator installed a new switch using a script to configure it. IP connectivity was tested using pings to SwitchB. Later attempts to access NewSwitch using Telnet from SwitchA failed. Which statement is true?（）

A. Executing password recovery is required.
B. The virtual terminal lines are misconfigured.
C. Use Telnet to connect to RouterA and then to NewSwitch to correct the error.
D. Power cycle of NewSwitch will return it to a default configuration.

7.單項選擇題A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）

A. Drop the data.
B. Send the data frames to the default gateway.
C. Create an ARP request to get a MAC address for the receiving host.
D. Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.

8.單項選擇題When two hosts are trying to communicate across a network, how does the host originating the communication determine the hardware address of the host that it wants to "talk" to?（）

A. RARP request
B. Show Network Address request
C. Proxy ARP request
D. ARP request
E. Show Hardware Address request

9.單項選擇題Which network protocol does DNS use?（）

A. FTP
B. TFTP
C. TCP
D. UDP
E. SCP

10.單項選擇題Which statement describes the process of dynamically assigning IP addresses by the DHCP server?（）

A. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B. Addresses are permanently assigned so that the hosts uses the same address at all times.
C. Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
D. Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.

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