Chapter 1 - Introduction.doc

CCNA 640-802 依课本章节读考题, 读者可一边读考题, 一边读教材,可使您达到 " 事半功倍 " 的效果.

QUESTION 13

What are two advantages of Layer 2 Ethernet switches over hubs? (Choose two.) A. decreasing the number of collision domains

B. filtering frames based on MAC addresses

C. allowing simultaneous frame transmissions

D. increasing the size of broadcast domains

E. increasing the maximum length of UTP cabling between devices

Answer: BC

QUESTION 43 simultaneous(同步)

Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two.)

A. The transport layer divides a data stream into segments and may add reliability and flow control information.

B. The data link layer adds physical source and destination addresses and an FCS to the segment.

C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.

D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment. E. The presentation layer translates bits into voltages for transmission across the physical link.

Answer: AD

訊框查核序列 (Frame Check Sequence, FCS)- encapsulation(概括)

QUESTION 44

For which type of connection should a straight -through cable be used?

A. switch to switch

B. switch to hub

C. switch to router

D. hub to hub

E. router to PC

Answer: C

QUESTION 52

Which layer of the OSI reference model uses the hardware address of a device to ensure message delivery to the proper host on a LAN?

A. physical

B. data link

C. network

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