201-250.txt

用jsp编的一个网络程序

201. You are unable to telnet to a router at address 203.125.12.1 from a workstation with the IP address
203.125.12.23. You suspect that there is a problem with your protocol stack. Which of the following
actions is most likely to confirm your diagnosis?
A. ping 127.0.0.0
B. ping 203.125.12.1
C. telnet 127.0.0.1
D. ping 127.0.0.1
E. tracert 203.125.12.1

Answer: D

202. Which command displays RIP routing updates as they sent and received by the router?
A. show ip protocols
B. show ip route rip
C. debug ip rip
D. debug ip updates
E. debug ip transactions

Answer: C

203. Rachel is adding a balanced bybrid routing protocol to her network. Which of the following
commands would she use to start the routing process?
A. router rip
B. router igrp 100
C. router ospf 1
D. router eigrp 100

Answer: D

204. What is the bit pattern of the first octet of a Class B network address?
A. 0xxxxxxx
B. 10xxxxxx
C. 110xxxxx
D. 1110xxxx
E. 11110xxx

Answer: B

205. Which two statements accurately define IP addressing rules? (Choose Two)
A. IP multicast addresses start with 240
B. A host portion of all 1’s indicates a network broadcast
C. The value of zero (0) in the host portion means “all hosts” on the network
D. IP addresses are four octets long and contain a network portion and a host portion

Answer: B D

206. Which command retrieves the configuration file from NVRAM?
A. Config NVRAM
B. Copy NVRAM running-config
C. Copy startup-config running-config
D. Copy running-config startup-config

Answer: C

207. Which command allows the user to see a system message when logging into a router?
A. Banner MOTD
B. Message MOTD
C. Banner Message
D. Message Banner

Answer: A

208. Which line from a show spantree 1 command output indicates that virtual LAN1 (VLAN1) is
functioning properly?
A. Root port is fast Ethernet 0/26
B. Port Ethernet 0/1 of VLAN is forwarding
C. Designated port is Ethernet 0/1, path cost 10
D. Designated root has priority 0 address 00D0.588F.B600
E. VLAN is executing the IEEE compatible spanning tree protocol.

Answer: E

209. How does a bridge function?
A. It maintains a table of the IP address of the host connected to its internet segment
B. It passes packets outside of its network segment if its IP address cannot be found on its table.
C. It looks up the frames destination in its address table and sends the frame towards the destination.
D. It maintains the table of the data link layer and network layer addresses for the host connected to its
network segment.

Answer: C

210. Which three functions are supported by connection oriented services? (Choose three)
A. Connection parameters are synchronized
B. Any loss or duplication of packets can be corrected
C. The data packet is independently routed and the service does not guarantee the packet will be
processed in order.
D. A data communication path is established between the requesting entity and the peer device on the
remote end system.

Answer: A B D

211. What are two purposes for using switches? (Choose two)
A. To reduce collisions
B. To increase collisions
C. To increase the number of collision domains
D. To decrease the number of collision domains
E. To decrease the number of broadcast domains

Answer: A C

212. What is an example of a valid MAC address?
A. 192.201.63.251
B. 19-22-01-63-25
C. 0000.1234.FEG
D. 00-00-12-34-FE-AA

Answer: D

213. Which command would you use to enable IP RIP version 1 on a router?
A. Router RIP
network 172.16.1.0
network 10.1.0.1
B. Router RIP
network 172.16.0.0
network 10.0.0.0
C. Router RIP
network 172.16.1.0 172.16.1.1
network 10.1.0.0 10.1.1.1
D. Router RIP
network 172.16.1.0 265.255.255.0
Network 10.1.0.0 255.255.0.0

Answer: B

214. Which three statements about Frame Relay configuration using sub interfaces are true? (Choose
three)
A. Each subinterface is configured either multi point or point to point.
B. Any network address must be removed from the physical interface.
C. The configuration of sub interfaces is done in router (Config-if)# mode.
D. Frame relay encapsulation must be configured on each sub interface.

Answer: A B C

215. Which command should you use to create an IP standard access list?
A. Access-list standard 172.16.4.13
B. Access-list 1 deny 172.16.4.13 0.0.0.0
C. Access-list 100 deny 172.16.4.13 0.0.0.0
D. Access-list 198 deny 172.16.4.13 255.255.255.255

Answer: B

216. Which router command allows you to determine if an IP access list is enabled on a particular
interface?
A. Router# show ip interface
B. Router> show access-list
C. Router# show ip access-list
D. Router> show interface ip access-list

Answer: A

217. Which router command allows you to view the entire contents of all access list?
A. Router# show interface
B. Router> show IP interface
C. Router# show access-list
D. Router> show all access list

Answer: C

218. Which statement about Ethernet networks is true?
A. The advantage of a full duplex is the ability to transmit data over Mbase2 cable.
B. Full duplex Ethernet requires a point-to-point connection when only two nodes are present.
C. Ethernet switches can use full duplex mode to connect multiple nodes to a single port of a switch.
D. Half duplex is a cut through packet processing method that is very fast with little error correction,
full duplex is store and forward method that is slower but has better error correction.

Answer: B

219. On a network design project you determine that a new testing application requires multiple hosts.
These hosts must be capable of sharing data between each host and an enterprise server at 10 Mbps
bandwidth.Other divisions in the company use applications that require less than 2 Mbps bandwidth of
the enterprise serve.
What is your economical recommendation?
A. That the existing 10BaseT hub be replaced with 100BaseT hub to improve overall performance.
B. That a router can separate the testing application from the rest of the network thus allowing the
testing application more bandwidth.
C. That the switch be installed so that enterprise server can be provided a 100 Mbps port and each
of the testing application hosts can be given dedicated 10 Mbps ports.
D. That a bridge be placed between the enterprise server and all other users with the exception of
the testing application.

Answer: C

220. What is the distance limitation for 100BaseT?
A. 607 ft
B. 25 meters
C. 1000 ft
D. 100 meters
E. 185 meters

Answer: D

221. A network is very congested. Currently all the devices are connected through a hub. Which
solution would best decrease congestion on the network?
A. Add a second hub
B. Replace the hub with a router.
C. Replace the hub with a switch.
D. Replace the hub with a repeater.

Answer: C

222. Which command sets the clock rate to 56 Kbps on serial0?
A. clockrate 56
B. clock rate 56
C. clockrate 56000
D. clock rate 56000
E. set clockrate 56
F. serial 10 clockrate 56
G. clock rate 56000 serial 10

Answer: D

223. If you are in IOS user mode which command do you use to enter the privileged mode?
A. Set
B. Enable
C. Configure
D. Privileges

Answer: B

224. In the setup dialogue what do the square bracket indicate?
A. Current or default settings.
B. Hard coded values that cannot be modified.
C. Values entered by the administrator but not saved.
D. Values that must be returned to NVRAM before becoming enabled.

Answer: A

225. Routers that have flash memory typically have preloaded copy of Cisco IOS software.
Which command should you use to make backup copy of the software image onto a network server?
A. Copy Flash TFTP
B. Save Copy TFTP
C. Write Backup TFTP
D. Write Backup (server-name)
E. Copy backup 2 (server-name)