CS601 MIDTERM MCQS MOAAZ AND WAQAR
1. Error correction is more ___ than the error detection.
a) Easy
b) Useless
c) Informal
d)
Difficult
2. ___ is responsible for governing
node to node communication.
a) Application layer
b) Session layer
c)
Data link layer
d) Presentation layer
3. The extra bits added with the
original data for error detection/correction
are called ___.
a) Fault bits
b) Port numbers
c)
Redundant bits
d) Process IDs
4. The ___ is the number of signal
elements sent per unit time.
a) Data rate
b)
Signal rate
c) Bit rate
d) Period
5. The ___ protocols uses both flow
and error control.
a) TCP/IP
b) HDLC
c) ICMP
d)
Stop-and-wait
6. ___ is an Authentication Protocol,
which uses two-step process to
authenticate user information.
a) CHAP
b) LCP
c)
PAP
d) ICMP
7. In Block coding we divide our
message into blocks of k bits called as
____.
a) Code words
b)
Data words
c) Passwords
d) Cross words
8. To control and manage the transfer
of data, a protocol called Point to
Point Protocol (PPP) is used at the
____ layer.
a) Physical
b) Network
c) Presentation
d)
Data link
9. ___ is an authentication protocol,
which is used by the PPP to
authenticate passwords.
a) CHAP
b)
PAP
c) LCP
d) ICMP
10. No matter whether the link is
dedicated or broadcast, data link control
(DLC) layer provides services between
___.
a) Virtual LANs
b)
Tow adjacent nodes
c) Ethernet links
d) Source and destination PCs
11. S-frames in High-Level Data Link
Control (HDLC) are only used to
transfer ___ information.
a) User data
b)
Control
c) Redundant
d) Original
12. Congestion Control is a feature
of ___ layer (s).
a) Data Link
b) Network
c) Transport
d)
All mentioned
13. ___ is used in the stop-and-wait
protocol to overcome the issue of
duplication.
a) Frame sequencing
b) Acknowledgement numbering
c) Counter and Timer reset
d)
Frame sequencing and Acknowledgement numbering
14. DLC in Data Link Layer stands for
___.
a) Divide Line Communication
b) Data Line Code
c)
Data Link Control
d) Demand Link Coordination
15. In even parity check code, the
value of syndrome is ___ If the number
of 1s is even.
a) 1
b) 2
c)
0
d) 4
16. If the hamming distance between
sent and received code word is ___
then it shows that received data is
corrupted.
a)
≠ 0
b) = 0
c) ≠ 1
d) = 1
17. ___ is not a function of Data
Link Control.
a) Framing
b)
Modulation
c) Error Control
d) Flow Control
18. Checksum is an error-detection
technique that can be required to a
message of ___ length.
a) Exactly 4
b) Exactly 8
c) Exactly 32
d)
Any
19. ___ category of coaxial cable is
used for cable TV.
a) RG-58
b)
RG-59
c) RG-11
d) RG-47
20. In circuit switched networks we
have low efficiency but minimal ___.
a) Delay
b) Speed
c) Throughput
d) Errors
20. In circuit switched networks we
have low efficiency but minimal ___.
a)
Delay
b) Speed
c) Throughput
d) Errors
21. In ___ systems. Resources are allocated
on demand.
a) Frequency switching
b) Line switching
c) Circuit switching
d)
Packet switching
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