Computer Network

defiantneedlessNetworking and Communications

Oct 23, 2013 (3 years and 11 months ago)

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Computer Network


www.gaterevoluti
on.com


Page
1


Q1.
The OSI model developed for

A) Manufacturers disliked the TCP/IP protocol suite

B) The rate of data transfer was increasing exponentially

C) Standards were needed to allow any two systems to communicate

D) None of the above


Q2.
The _______ layer lies
between the network layer and the application layer.


A) Physical


B) Data link


C) Transport



D) None of the above


Q3.
The _______ layer changes bits into electromagnetic signals.

A) Network

B) Data link

C) Transport

D) None of the above


Q
4.
The process
-
to
-
process delivery of the entire message is the responsibility of the________
layer.

A) Network

B) Transport

C) Application

D) Physical


Q5.
The ________ layer is the layer closest to the transmission medium.

A) Physical

B) Data link

C) Net
work

D) Transport


Q6.

As the data packet moves from the upper to the lower layers, headers are _______.



A) Added





C) Rearranged


B) Removed


D)
Modified


Q7.

When data are transmitted from device A to device B, the header from A's layer 4

is read by B's
_______ layer.


A) Physical



C) Data link layer


B) Network



D) None of the above


Q8
. Which of the following is an application layer service?


A) Remote log
-
in




C) Mail service


B) File transfer and access


D
) All the above


Q9
. What is the main function of the transport layer?


A) Node
-
to
-
node delivery

B) Process
-
to
-
process delivery


C) Synchronization


D) Updating and maintenance of routing tables


Q10.

Which of the following is NOT a responsibility of phys
ical layer of the OSI model?

A) Flow control


C
) Mechanical, electrical, and functional interface

B)
Interface to transmission media


D) Transmission of bit stream across physical medium


Q11
.
Which of the following

is NOT a responsibility of data link layer of the OSI model?


A)
Define Frames


B) Error correction and retransmission


C) Ensures

reliable transmission of data

D) Carrying frames between adjacent nodes


Computer Network


www.gaterevoluti
on.com


Page
2


Q
1
2
. When your computer is

connected to internet in
itial
ly it is called:


A) Server

B) Client


C) Hub


D) None of these


Q
1
3
. Any electronic device on a network is called a:

A) Switch

B)
Hub

C) Router

D) Node


Q
1
4
. In the context of the OSI communication architecture, in which of the following


Layers

are encryption controls unlikely to be exercised?

A)
P
resentation B) Data link C) Physical D)
Transport


Q
1
5
. Which layer establishes, maintains, and terminates communications between applications
located o
n different devices?

A)
Application


B)

Presentation
C)

Session.


D)
Network


Q16
. Repeaters and hubs operate at which layer?

A)

Application


B)
Physical

C)
Session

D)
Network


Q17
. Telnet, FTP
, SMTP, DNS, HTTP are examples of protocols that are used in


A)

Application Layer
of

OSI Reference Model


B
)

Presentation Layer
of

OSI Reference Model


C)
Session Layer
of

OSI Reference Model




D)

DATA Link Layer o
f

OSI Reference

Model


Q18
. Which of the following technique provides dedicated communication channel between two
stations?

A)

Switch Netwo
rk B)

Circuit Switching

C)
Packet Switc
hing D)

None
of

These


Q19
. End
-
to
-
end
co
nnectivity

is provided
from host
-
to
-
host in

A)

Network
Layer B)

Session Layer

C)

Data Link Layer


D)

Transport Layer
--