Q11-TRUE or FALSE? a) When using a Polling-based protocol, slaves contend for th
ID: 2249788 • Letter: Q
Question
Q11-TRUE or FALSE? a) When using a Polling-based protocol, slaves contend for the channel to transmit application data in the same way as in a random-access protocol. TRUE/FALSE b) When transmitting a packet, an 802.11 station transmits the whole packet, without detecting if a collision is happening or not during the transmission. TRUE/FALSE c) If a transmission fails, an 802.11 station enters the backoff procedure using a random backoff counter chosen from the interval [0,CW], where CW is the contention window that depends on the number of transmission attempts. TRUE/FALSE d) An 802.11 station decrements its backoff counter even if it detects the channel being occupied by another transmission. TRUE/FALSE e) One way to mitigate the hidden node problem is to use RTS/CTS messages. TRUE/FALSE f) Bluetooth stations transmit on a single 11MHz channel chosen by the user. TRUE/FALSE g) Bluetooth avoids channel contention by employing a polling mechanism in which a slave transmits to the master only if it receives a message from the master in the previous time-slot. TRUE/FALSE h) The Bluetooth specifications specifies that master stations that operate in the same area must communicate to coordinate their frequency hopping sequences to avoid inter-piconet interference. TRUE/FALSE i) Bluetooth stations can work together to detect the presence of an 802.11 access point and adjust the frequency hopping to avoid the channels used by the 802.11 access point. TRUE/FALSE j) Both 802.11 and Bluetooth have reliable data transfer procedures in the link layer. TRUE/FALSE just c), d), e), , and g) are FALSE. just a), d), f), and h) are FALSE. just b), c), e), and g) are FALSE. just a), b), d), and h) are FALSE.Explanation / Answer
just a),d),f),and h) are false.
f) Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs).
a)in literature it may be same but in general it is different
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