Friday, October 5, 2007

ccna 1 modul 8

1 What is characteristic of the operation of a Layer 2 switch?
***uses the destination MAC address to determine the specific interface to forward a frame***

2 Two newly hired technicians are discussing the implementation of a new LAN. One technician proposes installing a hub. The other technician advises installing a switch. Which statements are true about the differences between a hub and a switch? (Choose two.)
***A switch provides more throughput to hosts on a LAN ***
***A switch provides a collision-free environment on a LAN. ***

3 Refer to the exhibit. Forty-eight workstations are connected to a hub. The users are able to connect to the network, but access is very slow. An entry-level technician replaces the 10 Mbps hub with 100 Mbps hub but the problem still exists. What is the most economical way to correct the problem?
***Replace the hub with a switch. ***

4 Exhibited is a portion of ABC Company internetwork. Which of the connections can be full duplex?
***segments 2, 3, and 4 ***

5 Refer to the exhibit. The switch and the hub have default configurations, and the switch has built its CAM table. Which of the hosts will receive the data when workstation A sends a unicast packet to workstation C?
***workstation C ***

6 An administrator would like to connect ten workstations on a network. The device selected by the administrator must allow connectivity between hosts without sharing bandwidth. Which device would be appropriate?

7 Which networking devices use the MAC address to make forwarding decisions? (Choose two.)
***bridge ***
***switch ***

8 Which devices are primarily used to extend cable segments within a collision domain by regenerating the data signals? (Choose two.)

9 Which devices will create multiple collision domains in an Ethernet network? (Choose two.)
***router ***

10 Refer to the exhibit. How many broadcast domains exist in classroom 240?
***1 ***

11 A PC receives a frame. Which situation will cause the NIC on the receiving host to pass the frame contents up the OSI layers to be processed by the PC?
***The destination MAC address of the frame is FFFF.FFFF.FFFF. ***

12 A network administrator has a multi-floor LAN to monitor and maintain. Through careful monitoring, the administrator has noticed a large amount of broadcast traffic slowing the network. Which device would you use to best solve this problem?
***router ***

13 What will a bridge do if it receives a frame with a MAC address that is not within the table?
***send frame to all ports except source port ***

14 Which networking device reduces the size of both collision domains and broadcast domains?
***router ***

15 What is used to prevent Layer 2 switching loops?
***Spanning-Tree Protocol***

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