最新的Cisco 640-821免費考試真題

問題1

An administrator issues the show ip interface s0/0 command and the output displays the line Serial0/0 is up, line protocol is upWhat does "line protocol is up" specifically indicate about the interface?

A. Keepalives are being received on the interface.

B. A carrier detect signal has been received from the connected device.

C. CDP has discovered the connected device.

D. IP is correctly configured on the interface.

E. The cable is attached properly.

正確答案: A

問題2

HOTSPOT
lab

正確答案:

問題3

An elementary school has a computer in every classroom. One entire wing of the school connects to a centrally located hub. The teachers have reported a slowdown in the past few weeks to the network administrator. The network administrator has analyzed the network and documented a steep increase in utilization as the teachers use a new network- based classroom management application. Which solution will improve the performance the most?

A. Reboot the router that connects to the hub.

B. Install a repeater in the affected wing.

C. Install a router and install another hub in the affected wing.

D. Replace the hub with a switch.

E. Ensure all devices in the affected wing have a default gateway.

正確答案: D

問題4

A network associate needs to configure a router by connecting a remote computer to the router through the router auxiliary port. Which two statements describe the hardware required to make the connection to the router? (Choose two.)

A. The auxiliary port must be connected to a modem.

B. The technician needs an Ethernet transceiver.

C. The auxiliary port must be connected to an Ethernet LAN.

D. The technician needs an RJ-45 to DB25 adapter.

正確答案: A,D

問題5

What is the subnet address for the IP address 172.19.20.23/28?

A. 172.19.20.15

B. 172.19.20.32

C. 172.19.20.16

D. 172.19.20.0

E. 172.19.20.20

正確答案: C

問題6

Refer to the exhibit. HostB is sending a file to HostA. B represents the frame as it leaves the Oshawa router. What is the Layer 2 destination address of the frame at this point?

A. aabb.5555.2222

B. abcd.4444.0012

C. abcd.1123.0045

D. abcd.2246.0035

E. abcd.1234.5678

正確答案: B

問題7

lab

正確答案:

Shore(config)# interface eth0
Shore(config-if)# ip address 192.168.195.113 255.255.255.240
Shore(config-if)# no shutdown
Shore(config-if)# exit
Shore(config)# interface ser0
Shore(config-if)# ip address 192.168.195.33 255.255.255.240
Shore(config-if)# no shutdown
Shore(config-if)# exit
Shore(config)# router rip
Shore(config-router)# network 192.168.195.0
Shore(config-router)# end
Shore# copy run start

問題8

An administrator cannot connect from R1 to R2. To troubleshoot this problem, the administrator has entered the command shown in the exhibit. Based on the output shown, what could be the problem?

A. The serial interface is configured for half duplex.

B. The serial interface has a full buffer.

C. The serial interface is configured for the wrong frame size.

D. The serial interface has the wrong type of cable attached.

E. The serial interface does not have a cable attached.

正確答案: D

問題9

A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

A. use a different source port for the session

B. start a new session using UDP

C. obtain a new IP address from the DHCP server

D. decrease the window size

E. decrease the sequence number

正確答案: D

問題10

What is the difference between the Cisco router IOS commands show cdp neighbor detail and show cdp entry?

A. The show cdp neighbor detail command shows all neighbor information, while show cdp entry displays only one line of output for each neighbor.

B. The show cdp entry command shows neighbor information for all neighbors with one line of output for each, while show cdp neighbor detail lists each neighbor with detailed output on each.

C. The show cdp neighbor detail command shows neighbor information for a single neighbor only, while show cdp entry displays detailed output on each neighbor known.

D. The show cdp entry command shows neighbor information for specific neighbors only, while show cdp neighbor detail lists each neighbor with detailed output on each.

正確答案: D

最新的Cisco Introduction to Cisco Networking Technologies - 640-821免費考試真題

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