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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
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