What is known as "one-to-nearest" addr...

单项选择题What is known as "one-to-nearest" addressing in IPv6?（）

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

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1.单项选择题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

2.单项选择题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

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3.单项选择题How many bits are contained in each field of an IPv6 address?（）

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

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4.单项选择题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

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5.单项选择题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.

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6.单项选择题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.

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7.单项选择题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

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8.单项选择题Which network protocol does DNS use?（）

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

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9.单项选择题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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10.单项选择题On corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?（）

A. a router with subinterfaces configured on the physical interface that is connected to the switch
B. a router with an IP address on the physical interface connected to the switch
C. a switch with an access link that is configured between the switches
D. a switch with a trunk link that is configured between the switches

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