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Q. Explain Frequency-division multiplexing?
Frequency-division multiplexing (FDM) is a technique for data transmission widely used in telephone, radio, and cable TV systems in which the transmission frequency spectrum (i.e., bandwidth) is divided into smaller bands known as subchannels.
Data transmission between two stations can be achieved in either simplex, half-duplex, or full-duplex mode. In a simplexmode,mainly used in radio and TV broadcasts, information travels only in one direction. Thismode is rarely used in data communications. In half-duplexmode, used by radio communications, information may travel in both directions, but only in one direction at a time. The transmitter becomes the receiver and vice versa. In a full-duplex mode, information may travel in both directions simultaneously. This mode, used in telephone systems, adopts two different carrier frequencies.
Q. Can you explain about Internet Protocol? Internet protocol specifies the rules which define the details of how computers communicate. It specifies exactly how a packet shoul
Using ARQ, a sending modem must wait for a return ACK for each sent block before sending the next block. (A) discrete (B)
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Explain differences between folded and non-folded network. Folded network: While all the inlets/outlets are connected to the subscriber lines, the logical connection shows as
WRITE MISS POLICY: Write allocate fetch on write fetch entire block, then write word into block allocate a new block on each writ allocate block, but
In a particular exchange during busy hour 1200 calls were offered to a group of trunks, during this time 6 calls were lost. The average call duration being 3 minutes Calculate
engineering plastics ,rubbers ,composites
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