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State about CSMA/CA
It belongs to a class of protocols known as multiple access methods. CSMA/CA stands for: Carrier Sense Multiple Access with Collision Avoidance. In CSMA, a station willing to transmit has to first listen to channel for a predetermined amount of time so as to check for any activity on channel. If channel is sensed "idle" then station is permitted to transmit. If channel is sensed as "busy" station has to defer its transmission. This is essence of both CSMA/CD and CSMA/CA. In CSMA/CA (Local Talk), once channel is clear, a station transmits a signal telling all other stations not to transmit, and then sends its packet. In Ethernet 802.3, station continues to wait for a time, and checks to see if channelis still free. If it is free, station transmits, and waits for an acknowledgment signal that packet was received.
Distributed System 1. What is a message passing system? Discuss the desirable features of a message passing system. 2. Discuss the implementation of RPC Mechanism in detail.
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What is applying of an Open Source Systems? No licensing issues No initial cost Speed of Access Openness and Transparency
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Voice synthesis Loud speakers and special software are used to output information in the form of sound to help blind and partially-sighted people; it also helps people who have d
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