Test 2 Flashcards
provides for data transmission in one direction only, from sender to reciever
unrestricted simplex protocol
specify the network layer where each of the following devices are found: (a) switch; (b)hub; (c)router.
a. datalink b. physical. c.network
utilizes a physical device that could be segmented into multiple logical networks
virtual lan
a protocol for carrier transmission in wireles networks. acts to prevent collisions before they happen.
CSMA/CA
describe why a station needs two receivers in Wavelength Division Multiple Access
It needs one to listen to the control channel and the other to get the data from the data channel
if occupied it is persistent to watching the channel
1-persistent
probability of p using the channel
p-persistent
If idle, then it transmits immediately. If busy, then it waits for a random period of time
non-persistent
uses frequency hopping spread spectrum and the frequency of hops is decided by the master
Bluetooth
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.
Adaptive Tree Walk
space out repeated retransmissions of the same block of data, often as part of network congestion avoidance.
binary exponential backoff algorithm
responsibility of the traffic and control will be distributed among participants
DCF
only one takes responsibility
PCF
no one gets into some frequency at the same time
FHSS
each person gets a different frequenct
OFDM
