Q.1
Which of the following below is a loopback IP address?
  • 127.0.0.0
  • 127.0.1.1
  • 127.0.1.0
  • 127.0.0.1
Q.2
Which of the following delay is faced by the packet in travelling from one end system toanother?
  • Propagation delay
  • Queuing delay
  • Transmission delay
  • All of the mentioned
Q.3
The time required to examine the packet’s header and determine where to direct the packetis part of
  • Processing delay
  • Queuing delay
  • Transmission delay
  • Propagation delay
Q.4
In TDM, the transmission rate of a multiplexed path is always the sum of the transmission rates of the signal sources.
  • Greater than
  • Lesser than
  • Equal to
  • Equal to or greater than
Q.5
If there are n signal sources of same data rate, then the TDMlink has slots.
  • N
  • n/2
  • n*2
  • 2n
Q.6
If there are n signal sources of same data rate, then the TDMlink has slots.
  • N
  • n/2
  • n*2
  • 2n
Q.7
If link transmits 4000frames per second, and each slot has 8 bits, the transmission rate of circuit this TDM is
  • 32kbps
  • 500bps
  • 500kbps
  • 32bps
Q.8
Is the multiplexing technique that shifts each signal to a different carrierfrequency.
  • FDM
  • TDM
  • Both FDM & TDM
  • PDM
Q.9
The physical layer translates logical communication requestsfrom the into hardware specific operations.
  • Data link layer
  • Network layer
  • Transport layer
  • Application layer
Q.10
The physical layer translates logical communication requestsfrom the into hardware specific operations.
  • Data link layer
  • Network layer
  • Transport layer
  • Application layer
Q.11
What will be the efficiency of a Stop and Wait protocol, if the transmissiontime for a frame is 20ns and the propagation time is 30ns?
  • 20%
  • 25%
  • 40%
  • 66%
Q.12
In Ethernet CSMA/CD, the special bit sequence transmitted by media accessmanagement to handle collision is called
  • Preamble
  • Post amble
  • Jam
  • None of the above
Q.13
In a packet switching network, if the message size isbytes and eachpacket contains a header of 3 bytes. Ifpackets are required to transmit the message, the packet size is .
  • 2 bytes
  • 1 bytes
  • 4 bytes
  • 5 bytes
Q.14
Which of the following statements is FALSE regarding a bridge?
  • Bridge is a layer 2 device
  • Bridge reduces collision domain
  • Bridge is used to connect two or more LAN segments
  • Bridge reduces broadcast domain
Q.15
Which of the following system calls results in the sending of SYNpackets?
  • socket
  • bind
  • listen
  • connect
Q.16
The main difference between TCP and UDP is
  • UDP is connection oriented whereas TCP is datagram service
  • TCP is an Internet protocol whereas UDP is an ATM protocol
  • UDP is a datagram whereas TCP is a connection oriented service
  • All of the above
Q.17
What operates in the Data Link and the Network layer?
  • NIC
  • Bridge
  • Brouter
  • Router
Q.18
Which file transfer protocol uses UDP?
  • NFS
  • TELNET
  • TFTP
  • FTP
Q.19
Which of the following network access standard is used for connectingstations to a circuit-switched network?
  • X.3
  • X.21
  • X.25
  • X.75
Q.20
To avoid transmission errors, a check figure is calculated by the
  • transmitting computer
  • receiving computer
  • both (a) and (b)
  • Start and stop bit
0 h : 0 m : 1 s