Data Communication and Networking – Data link Protocols – Asynchronous protocols MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Data link Protocols – Asynchronous protocols ”.
 

1
. Asynchronous protocols are widely used in _______
  • repeaters
  • routers
  • modems
  • bridges
2
. _______ frame the data unit in asynchronous transmission
  • Error control bits
  • Start and stop bits
  • Flags
  • ACK characters
3
. _______ layer protocols contain rules for line discipline, flow control, and error handling
  • Data link
  • Network
  • Physical
  • Transport
4
. The gaps between characters in asynchronous transmission are _______ in length
  • variable
  • fixed-size
  • exactly one character
  • one bit
5
. Since asynchronous protocols are _______, they are being replaced by synchronous protocols
  • expensive to implement
  • inherently slow
  • require complex hardware
  • require complex software
6
. XMODEM, BLAST, and Kermit are all _______ protocols
  • character-oriented
  • bit-oriented
  • synchronous protocols
  • asynchronous protocols
7
. In an XMODEM exchange, the sender can receive _______ frame
  • an ACK
  • a NAK
  • a CAN
  • any of the above
8
. The most widely used asynchronous protocol is _______
  • XMODEM
  • YMODEM
  • BLAST
  • Kermit
9
. In XMODEM and Kermit, the sender waits for _______ before transmission begins.
  • an ACK
  • a NAK
  • a CAN
  • any of the above
10
. Kermit is a _______
  • terminal emulation program
  • file transfer protocol
  • LAN
  • a and b
11
. Kermit uses the _______ character to notify the receiver that a control character is next
  • DEL
  • DLE
  • #
  • Ctrl

 
 
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