Test 2 reversed

Question 1

unrestricted simplex protocol

Answer 1

provides for data transmission in one direction only, from sender to reciever

Question 2

virtual lan

Answer 2

utilizes a physical device that could be segmented into multiple logical networks

Question 3

CSMA/CA

Answer 3

a protocol for carrier transmission in wireles networks. acts to prevent collisions before they happen.

Question 4

1-persistent

Answer 4

if occupied it is persistent to watching the channel

Question 5

p-persistent

Answer 5

probability of p using the channel

Question 6

non-persistent

Answer 6

If idle, then it transmits immediately. If busy, then it waits for a random period of time

Question 7

Bluetooth

Answer 7

uses frequency hopping spread spectrum and the frequency of hops is decided by the master

Question 8

Adaptive Tree Walk

Answer 8

starts on the root note, if any collision then descend to the right most child. If no collisions then give control to any leaf node.

Question 9

binary exponential backoff algorithm

Answer 9

space out repeated retransmissions of the same block of data, often as part of network congestion avoidance.

Question 10

DCF

Answer 10

responsibility of the traffic and control will be distributed among participants

Question 11

PCF

Answer 11

only one takes responsibility

Question 12

FHSS

Answer 12

no one gets into some frequency at the same time

Question 13

OFDM

Answer 13

each person gets a different frequenct

Question 14

DSSS

Answer 14

is a spread spectrum technique whereby the original data signal is multiplied with a pseudo random noise spreading code.

Question 15

pure ALOHA

Answer 15

moment it finished its frame then jumps right away

Question 16

slotted ALOHA

Answer 16

waits until the beginning of a time slot