Data Communications and Computer Networks by Pearson

Error Detection and Correction 123

Multiple Choice Questions

 1. Whichofthefollowingserviceisnotpro-

videdbythedatalinklayer?

(a) Unacknowledgedconnectionless

(b) Unacknowledgedconnection-oriented

(c) Acknowledgedconnectionless

(d) Acknowledgedconnection-oriented

 2. Theprocessofbreakingstreamofbitsinto

framesisknownas__________.

(a) Bitstuffin

(b) Bytestuffin

(c) Framing

(d) Charactercount

 3. Whatistheprocessofaddingoneextra0

whenevertherearefiv consecutive1sinthe

data,sothatthereceiverdoesnotmistake

thedataaboutaflag

(a) Bitstuffing (b) Bitpadding

(c) Bytestuffing (d) Byte