Multiple choice

Transmission initiation is done by

  1. head end

  2. switching elements

  3. computers

  4. bus
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A Correct answer
Explanation

In the Distributed Queue Dual Bus (DQDB) protocol used for MANs, the head end is the node at the beginning of the bus that initiates the transmission process. It continuously generates empty slots that travel down the bus. Other nodes on the network monitor these slots and fill them with data when they need to transmit.

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