Quiz 3 - CIS 2660

What are two services performed by the data link layer of the OSI model?

- It accepts Layer 3 packets and encapsulates them into frames. - It provides media access control and performs error detection

What are two reasons for physical layer protocols to use frame encoding techniques?

- to distinguish data from control information - to identify where the frame starts and ends

A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network?

1. coverage 2. area 3. interference security

What is contained in the trailer of a data-link frame?

Error detection data

What is one advantage of using fiber optic cabling rather than copper cabling?

It is able to carry signals much farther than copper cabling

As data travels on the media in a stream of 1s and 0s how does a receiving node identify the beginning and end of a frame?​

The transmitting node inserts start and stop bits into the frame.

Why are two strands of fiber used for a single fiber optic connection?

The two strands allow the data to travel for longer distances without degrading

Which characteristic describes crosstalk?

the distortion of the transmitted messages from signals carried in adjacent wires

What is indicated by the term throughput?

the measure of the transfer of bits across the media over a given period of time

What technique is used with UTP cable to help protect against signal interference from crosstalk?

twisted together into pairs