Data Communication & Networking MCQs Set-3

This Portion of Data Communication and Networking contains more frequently asked MCQs (Multiple Choice Questions and Answers) / Objective Type Questions and Answers in the various Competitive Examinations.
 

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1
. How many frames are included for traffic in 26TDMA frames
  • 1
  •  24 
  • 25
  • 16
2
. What is the port number of the HTTP
  • 80
  • 25
  • 23
  • 20/21
3
. What is the port number of the SMTP
  • 25 
  • 23
  • 20/21
  • 27960
4
. TCP is ______________
  • Connection-oriented
  • Reliable
  • Both a & b
  • None of these
5
. Which is a network protocol that is based on UDP and is a component of the Internet Protocol Suite, defined by IETF(Internet Engineering Task Force)
  • SNMP 
  • Scalability
  • Screening
  • Multicasting
6
. In X.25 defines the protocols from
  • Layer 2 to Layer 3
  • Layer 1 to Layer 2
  • Layer 1 to Layer 3
  • Layer 3 to Layer 2
7
. Advantages of cell relay are
  • High-speed transmission
  • Multiplexing transmission
  • Both a & b
  • None of these
8
. When compared with the OSI reference model, the IEEE standard contains the following layers:
  • Physical layer
  • Medium access control(MAC) equivalent to the lower part of the OSI data link layer
  • Logical link layer(LAC) equivalent to the upper part of the data link layer
  • Network layer, the OSI network layer, that performs some of the higher order layer functions
  • All of these
9
. In a token ring, the stations are connected to the __________
  •  Logical ring 
  • Physical ring
  • Both a & b
  • None of these
10
. A _________ preamble is used to synchronize the receiver’s clock
  • Four-byte
  • Three-byte
  • Two-byte
  • One-byte

 
 
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