Minggu, 08 Februari 2009

ccna 1 final version 1 part 2

18. What are three characteristics of CSMA/CD? (Choose three.)

Devices listen to the media and transmit data only when they cannot detect another signal on the media.
All devices on the media can hear all communications.
Devices communicate based on a configured priority.
After a collision occurs, the devices that caused the collision have first priority when attempting to retransmit.
When a collision occurs, all devices stop transmitting for a randomly generated period of time.
CSMA/CD uses a token system to avoid collisions.

19. Refer to the exhibit. The router of the company failed and was replaced. After the replacement, hosts C and D in the Education office are able to ping each other, but they are unable to access the hosts in the Accounts office. What is the likely cause of the problem?
The IP address at the fa0/0 interface of the router is incorrectly configured.
The subnet mask at the fa0/1 interface of the router is incorrectly entered.
The IP address at the serial interface of the router is incorrectly configured.
The hosts in the Accounts office are not on the same subnet as the hosts in the Education
office.

20. Refer to the exhibit. Host A and B are unable to communicate with each other. What is the reason for this?
Host A is assigned a network address.
Host B is assigned a multicast address.
Host A and host B belong to different networks.
The gateway addresses are network addresses.

21. Refer to the exhibit. A user wants to view the current configuration. The output of the ipconfig/all command is displayed in the exhibit. What three facts can be determined from the output? (Choose three.)
The IP address is obtained from the DHCP server.
This PC cannot communicate with other networks.
The network can have 14 hosts.
The prefix of the computer address is /25.
The IP address is routable on the Internet.
The assigned address is a private address.

22. Which two types of media can provide bandwidth up to 1 Gb/s? (Choose two.)
10 BASE-T
100 BASE-T
100 BASE-FX
1000 BASE-TX
1000 BASE-SX

23. Refer to the exhibit. RouterB is configured properly. The Ethernet interface Fa0/0 of RouterA is configured with the use of the commands that are shown However, a ping from the Fa0/0 interface of RouterA to the Fa0/0 interface of RouterB is unsuccessful. What action should be taken on RouterA to solve this problem?
Use the description command on the FastEthernet interface Fa0/0.
Configure the clock rate of the FastEthernet interface Fa0/0.
Use the no shutdown command on the FastEthernet interface Fa0/0.
Reboot the router.

24. Refer to the exhibit. Host A wants to connect to host B on a different network. Which three IP addresses can be assigned to host A to enable this connectivity?(Choose three.)
172.16.11.36
172.16.11.95
172.16.11.88
172.16.11.70
172.16.11.64
172.16.11.67

25. Refer to the exhibit. Host A wants to access e-mail. Which destination socket number will be used to communicate this request?
10.10.1.2:53
0007.A7B8.0008:25
10.10.1.3:23
10.10.1.3:25

26. A network administrator uses the copy startup-config running-config command on a router to make configuration changes. Which component is affected by this command?
ROM
NVRAM
RAM
flash

27. Refer to the exhibit. In a network, Hosts A and B are exchanging segments at the transport layer. Which two statements are true about this exchange? (Choose two.)
Host A is transferring files to host B using FTP.
Host A will send the next segment containing data for this session starting with byte number 11
The segment from the destination host indicates that 11 bytes have been received successfully
Host A is initiating a Telnet session to host B
Host B can send the next segment of the data starting with byte number 2

28. How does the transport layer allow a host to maintain multiple, simultaneous communication streams across different applications?
It uses error control mechanisms.
It uses a connectionless protocol only for multiple simultaneous transmissions.
It uses multiple Layer 2 source addresses.
It uses multiple ports.

29. What information is contained in the header of Layer 3 to help data delivery?
port number
device physical address
destination host logical address
virtual connection identifier

30. Refer to the exhibit. The tracert command used from host X to host Y was successful. What is the correct sequence of intermediary network devices that will be present in the trace list?
switch A, switch D, switch G, host Y
router B, router E, router F, host Y
switch A, router B, switch D, router E, router F, switch G, host Y
switch A, router B, router F, switch G, host Y

31. While configuring a router, a network technician wants to name the router. Which prompt should the technician see when entering the hostname command?
Router>
Router#
Router(config)#
Router(config-line)#

32. An organization has decided to use IP addresses in the range 172.20.128.0 to 172.20.143.255. Which combination of network ID and subnet mask identifies all IP addresses in this range?
Network ID: 172.20.128.0 Subnet mask: 255.255.255.0
Network ID: 172.20.128.0 Subnet mask: 255.255.0.0
Network ID: 172.20.128.0 Subnet mask: 255.255.224.0
Network ID: 172.20.128.0 Subnet mask: 255.255.240.0
Network ID: 172.20.128.0 Subnet mask: 255.255.255.240

33. Refer to the exhibit. Which logical topology describes the exhibited network?
star
ring
point-to-point
multi-access

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