1-50.txt

用jsp编的一个网络程序

A. Distance vector protocols send the entire routing table to directly connected neighbors.
B. Link state protocols send the entire routing table to all routers in the network.
C. Distance vector protocols send updates about directly connected neighbors to all networks listed in
the routing table.
D. Link state protocols send updates containing the state of their own links to all other routers on the
network.

Answer: A D

26. Choose the correct cable to connect an Ethernet switch to another Ethernet switch.
A. Cable #1
B. Cable #2
C. Cable #3
D. Cable #4

Answer: B

27. Choose the correct cable to directly connect a router to another router over Ethernet.
A. Cable #1
B. Cable #2
C. Cable #3
D. Cable #4

Answer: B

28. From the DOS command prompt, you are able to ping a router but are unable to telnet to it. What is
the most likely cause of the problem?
A. The PC has a bad network interface card
B. The IP address of the router is on a different subnet
C. No password has been set on the router vty lines
D. The default gateway is not set on the PC
E. The IP address of the workstation is incorrect

Answer: C

29. Which Layer 2 component connects the network media to the host?
A. hub
B. switch
C. bridge
D. NIC
E. transceiver

Answer: D

30. Which of the following are unique characteristics of half-duplex Ethernet as compared to full duplex
Ethernet?(Choose two)
A. Shared collision domain
B. Private collision domain
C. Higher effective throughput
D. Lower effective throughput
E. Private broadcast domain

Answer: A D

31. Modern networks are often described as using 100Base-TX components. What is meant by the
term ‘Base’ in this definition?
A. It describes the signaling method for communication on the network.
B. It refers to the type of media used in the network.
C. It relates to the speed of transmission of the network signals.
D. It defines the allowable length of media that can be used.
E. It defines half-duplex or full-duplex operation.

Answer: A

32. What are the effects of sustained, heavy collisions in CSMA/CD LANs? ( Choose 3.)
A. increased broadcast traffic
B. delay
C. low throughput
D. high throughput
E. congestion
F. higher bandwidth

Answer: B C E

33. What is the result of segmenting a network with a router into segments 1 and 2?
A. It increases the number of collisions.
B. It decreases the number of broadcast domains.
C. It connects segment 1’s and broadcasts to segment 2.
D. It prevents segment 1’s broadcasts from getting to segment 2.

Answer: D

34. Which commands could be used at the command line interface to troubleshoot LAN connectivity
problems on a router?(Choose three)
A. ping
B. tracert
C. ipconfig
D. show ip route
E. winipcfp
F. show interfaces

Answer: A D F

35. At what point in the frame shown in the diagram is the store-and-forward switching decision made?
A. A
B. B
C. C
D. D

Answer: D

36. You need to add a new VLAN, named ACCOUNTS, to your switched network. Which of the
following are true regarding configuration of this VLAN?(Choose three)
A. The VLAN must be created.
B. The VLAN must be named.
C. An IP address must be configured for the ACCOUNTS VLAN.
D. The desired ports must be added to the new VLAN.
E. The VLAN must be added to the STP domain.

Answer: A B D

37. Which two statements about the store and forward switching method are true? (Choose two)
A. Latency remains constant regardless of frame size.
B. Latency through the switch varies with frame length.
C. The switch receives the complete frame before beginning to forward it.
D. The switch checks the destination address as soon as it receives the header and begins forwarding
the frame immediately.

Answer: B C

38. Which of the following statements are true regarding bridges and switches? (Choose 3)
A. Switches are primarily software based while bridges are hardware based.
B. Both bridges and switches forward Layer 2 broadcasts.
C. Bridges are frequently faster than switches.
D. Switches have a higher number of ports than most bridges.
E. Bridges define broadcast domains while switches define collision domains.
F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.

Answer: B D F

39. Given the network diagram, assume that ports 1 through 3 are assigned to VLAN1 and ports 4 through
6 are assigned to VLAN2 on each switch. The switches are interconnected over a trunked link. Which of
the following conditions would verify proper VLAN and trunk operation? (Choose three.)
A. Host 1-1 can ping Host 1-2
B. Host 1-1 can ping Host 4-2
C. Host 1-1 can not ping Host 1-2
D. Host 4-1 can not ping Host 1-2
E. Host 4-1 can ping Host 4-2.

Answer: A D E

40. Router#show interface serial 0
Serial0 is down, line protocol is down
Hardware is HD64570
Internet address is 172.22.5.1/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input never, output 00:03:11, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0 (size/max(drops): Total output drops: 0
Queuing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max active/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
11 packets output, 476 bytes, 0 underruns
0 output errors, 0 collisions, 27 interface resets
0 output buffer failures, 0 output buffers swapped out
11 carrier transitions
DCD=down DSR=down DTR=down RTS=down CTS=down
Based on the output of the show interface serial 0 command issued on a DTE router, which OSI layer
is the most likely source of the problem?
A. physical layer
B. data link layer
C. network layer
D. transport layer

Answer: A

41. A packet is the protocol data unit for which layer of the OSI model?
A. data link
B. session
C. presentation
D. network
E. transport
F. application

Answer: D

42. At which OSI layer does data translation and code formatting occur?
A. Physical
B. Data link
C. Network
D. Transport
E. Session
F. Presentation

Answer: F

43. Which devices operate at all seven layers of the OSI model? (Choose 3)
A. network host
B. network management station
C. transceiver
D. bridge
E. web server
F. switch

Answer: A B E

44. Router# show ipx interface e0
Ethernet0 is up. line protocol1 is up
IPX address is 6F2C.0000.0C5d.b36e. Novell_ETHER [up] line-up. RIPPQ: 0. SAPPQ: 0
Delay of this IPX network, in ticks is 1 throughput 0 link delay 0
IPXWAN processing not enabled on this interface.
IPX SAP update interval is 1 minute(s)
IPX type 20 propagation packed forwarding is disabled
Incoming access list is not set
Outgoing access list is not set
IPX helper access list is not set
SAP GNS processing enabled, delay 0 ms, output filter list is not set
SAP Input filter list is not set
SAP Output filter list is not set
SAP Router filter list is not set
Input filter list is not set
Output filter list is not set
Router filter list is not set
Netbios Input host access list is not set
Netbios Input bytes access list is not set
Netbios Output host access list is not set
Netbios Output bytes access list is not set
Updates each 60 seconds, aging multiples RIP: 3 SAP:3
SAP interpacket delay is 55 ms, maximum size is 480 bytes
RIP interpacket delay is 55 ms, maximum size is 432 bytes
IPX accounting is disabled
IPX fast switching is configured (enabled)
RIP packets received 0, RIP packets sent 1
SAP packets received 0, SAP packets sent 1
What is the Layer 2 address as shown in the output of the show ipx interface e0 command?
A. 6F2C
B. 0000.0C
C. 5d.b36e
D. 0c5d.b36e
E. 0000.0c5d.b36e
F. 6F2C.0000.0c5d.b36e

Answer: E

45. Which Frame Relay feature allows the point-to-point Frame Relay PVC between Router A and Router B
to be identified at Router A as 100 and at Router B as 200?
A. locally significant DLCI
B. globally significant DLCI
C. locally significant LMI
D. globally significant LMI

Answer: A

46. Exhibit:
Router A is connected to Router B, a non-Cisco router, through the network cloud. Using the command
output shown what must be configured on Router A’s interface s0 change the line protocol from down to
up?
A. no shutdown
B. encapsulation ppp
C. interface serial point-to-point
D. clock rate 56000

Answer: B

47. Use the partial BRI configuration and graphic shown. Which additional command must be issued on the
Central router before interesting traffic will be sent to the Remote router?
A. (config-if)# dialer-group 1
B. (config-if)# dialer-list 1
C. (config-if)# dialer map 1
D. (config-if)# dialer-route 1

Answer: A

48. Which IOS command is used to associate an ISDN phone number with the next hop router
address?
A. isdn destination number
B. dialer map
C. isdn spid1
D. isdn line number

Answer: B

49. When setting up Frame Relay for point-to-point subinterfaces, which of the following must not be
configured?
A. the Frame Relay encapsulation on the physical interface
B. the local DLCI on each subinterface
C. an IP address on the physical interface
D. the subinterface type as point-to-point

Answer: C

50. What is the bandwidth of an ISDN BRI B channel?
A. 16Kbps
B. 64Kbps
C. 128Kbps
D. 144Kbps
E. 192Kbps

Answer: B