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WorksheetsComputer Networks Unit-2-1
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
The data link layer takes the packets from _________ and encapsulates them into frames for transmission.
a)
network layer
b)
physical layer
c)
transport layer
d)
application layer
2.
Which of the following tasks is not done by data link layer?
a)
framing
b)
error control
c)
flow control
d)
channel coding
3.
Which of the following is a data link protocol?
a)
ethernet
b)
point to point protocol
c)
hdlc
d)
all of the mentioned
4.
The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________
a)
piggybacking
b)
cyclic redundancy check
c)
fletcher’s checksum
d)
parity check
5.
Header of a frame generally contains ______________
a)
synchronization bytes
b)
addresses
c)
frame identifier
d)
all of the mentioned
6.
Data link control deals with the design and procedures for..... communication.
a)
node-to-node
b)
host-to-host
c)
process-to-process
d)
none of these
7.
Which of the following is NOT an example of standard at the Data Link Layer?
a)
HDLC
b)
ADCCP
c)
TCP
d)
None of these
8.
Which data link layer function answers the question: How much data may be sent?
a)
line discipline
b)
flow control
c)
error control
d)
session management
9.
Stop-and-wait is a __________ technique
a)
line discipline
b)
flow control
c)
error control
d)
session management
10.
In the stop-and-wait method of flow control, the sender sends ____________ at a time.
a)
a variable number of frames
b)
only one frame
c)
a set number of frames
d)
two frames
11.
In the stop-and-wait method of flow control, after the receiver receives a data frame, ____________ frame can be sent.
a)
an ACK
b)
a NAK
c)
an EOT
d)
an ACK and a NAK
12.
What is the main disadvantage of stop-and-wait flow control?
a)
unreliable
b)
inefficient
c)
attenuation
d)
dropped packets
13.
In the stop-and-wait method of flow control, if 100 good data frames are sent and received, how many ACK frames have been sent by the receiver?
a)
99
b)
100
c)
101
d)
200
14.
Address Resolution Protocol is a
a)
8 Bit Field
b)
10 Bit Field
c)
12 Bit Field
d)
16 Bit Field
15.
Which of the following describes the function of ARP?
a)
It is used to map a 32-bit IP address to a 48-bit ethernet address.
b)
It is used to map a 48-bit ethernet address to a 32-bit IP address.
c)
It is used to map a 32-bit ethernet address to a 48-bit IP address.
d)
It is used to map a 48-bit IP address to a 32-bit ethernet address.
16.
ARP stands for:
a)
Address Resolution Phase
b)
Address Resolution Protocol
c)
Address Recall Protocol
d)
ARP Resolution Protocol
17.
The data section of the frame has an extra byte is called the
a)
bit stuffing
b)
byte stuffing
c)
escape character
d)
number stuffing
18.
In High-level Data Link Control (HDLC), the frame that is used only to transport control information is called
a)
I- frame
b)
S-frame
c)
V-frame
d)
Piggybacking
19.
Framing that is done on data link layer are of
a)
1 type
b)
2 types
c)
3 types
d)
4 types
20.
Each frame in HDLC may contain up to
a)
three fields
b)
four fields
c)
five fields
d)
six fields
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