X2pctcs - Cmpen/EE 362 Practice Exam 2 Solution Spring 2009...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Cmpen/EE 362 Practice Exam 2 Solution Spring 2009 One 8 ½ x 11 sheet of notes and calculator allowed. Exam 2 will be Friday April 3, 4:40-5:30 in 113 IST building. Problem 1 . [16 crs. 4 each] Answer the following questions about the HDLC protocol. a). What kind of frame contains both a receive sequence number and a send sequence number? Solution. Information Frame. b). What is an an extended control field? Solution. It is a 16 bit field that allows 7-bit sequence numbers. c). What kind of frame carries a command to use an extended control field? Solution. An unnumbered frame . d). What three other commands are contained in a frame that carries a RNR (receive not ready) command, and what kind of a frame is it? Solution. Receive ready (RR), Reject (REJ), and Selective Reject (SREJ). Problem 2. [ 6 crs. 4/4] Name two different reasons for specifying a transmitter window. Solution. 1) To prevent ambiguity due to sequence number recycling. 2) To change the rate of flow of data (flow control). Problem 3.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

X2pctcs - Cmpen/EE 362 Practice Exam 2 Solution Spring 2009...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online