station typesno-transition mobility moreover
Station Types
No-transition mobility moreover stationary or moving only inside a BSS
BSS-transition mobility is able to move from one BSS to another, but confined inside one ESS
ESS-transition mobility is able to move from one ESS to another
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switch in a physical ring configuration any disabled or else disconnected node can disable the entire network use of a switch can permit the ring to
q illustrate about sliding window protocols- sliding window- keeps the unacknowledged outstanding frames in sender- keeps the expected frames in
q illustrate go back - n protocolgo back - n - sender window size lt 2m- receiver window size 1- why the names go back- n- when the frame is spoilt
80211 architectureess extended service set two or more bsss with aps connected through a distribution system wired lan in an infrastructure
station typesno-transition mobility moreover stationary or moving only inside a bssbss-transition mobility is able to move from one bss to another
q show the drawbacks of go-back-ndrawbacks of go-back-n - inefficient- every out of order received packets are discarded receiver side is simplified-
selective repeat arq - processing at the receiver additionally complex- the window size is reduced to 2m-1 2m2 at most- both the transmitter as well
q explain about bandwidth ndash delay productbandwidth - delay product - a measure of competence of arq system bandwidth bits per second round-trip
q calculate utilization percentage of the link- system stop and wait arq- bandwidth 1mbps- round trip for one bit 20ms- frame length 1000
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