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Data Communication MCQ
| Post Topic | MCQs Notes |
| Book Code | CS601 |
| FinalTerm/MidTerm | Both |
| University | Virtual University |
Data Communication MCQs With Answers
1: In the type of error, two or more bits in the da a unit will be changed.
Zero
Single bit
Burst
Mono
2: The message 1110 sent by a source is received by a destination as 1011. This is __ _type of error.
Single-Bit
Uni-Bit
Hamming
Burst
3: MAC stands for?
Main Access Control
Media Access Controller
Media Access Control
Mandatory Access Control
4: DSL stands for
digital subscriber line
data subscriber line
digital switched line
data switched line
5: If the Hamming distance between the sent and received code word is then it shows that the received data is corrupted.
=1
<-0
1
-0
6: Fast Ethernet has a data rate of Mbps.
10,000
100
10
1000
7: The payload field of the PPP frame is of variable size and it can carry maximum data up to
100 bytes
500 bytes
1500 bytes
10 bytes
8: is/are un-reliable protocol(s)
UDP
IP and UDP
IP and TCP
TCP
9: One of the most common protocols for point-to-point access is
IP
UDP
PPP
TCP
10: is an Authentication Protocol, which is used by the PPP to authenticate passwords
PAP
LCP
ICMP
CHAP
11: CDMA stands for
Carrier Data Multiple Access
Camer Division Multiple Access
Code Data Multiple Access
Code Division Multiple Access
12: Transmission technology (based on Ethernet) provides a data role of 1 billion bits per second
Fast Ethernet
Standard Ethernet
10BASE-T Ethernet
Gigabit Ethernet
13: Works with topologies in which one device is designated as a primary station and the other devices are secondary status
Polling
Reservation
None of the given
Token
14: The message 1110 sent by a source is received destination as 1011. This is a type of error.
Burst
Uni-Bit
Hamming
Single-Bit
15: In which controlled-access method all data e cha must be made through the primary device even if ven ultimate destination is a secondary device?
Token Passing
Polling
Port Forwarding
Reservation
16: MAC address is of
42 bits
48 bits
24 bits
36 bits
17: S-frames in High-Level Data Link Control (HDL used to transfer
Original
Control
Redundant
information.
18: CHAP is an Authentication Protocol, which is a process to authenticate user information.
Two-way
Four-way
Three-way
Five-way
19: MAC address is of
24 bits
42 bits
48 bits
36 bits
20: If we need to correct a single error in an 8-bit data unit, we need to consider possible error locations.
8
2
16
21: In order to find the Hamming distance between two pairs of words. logical operation is used.
OR
XOR
NAND
AND
22: S-frames in High-Level Data Link Control (HDLC) are only used to transfer information.
User data
Redundant
Original
Control
23: The Data Link layer provides services to the layer.
Application
Session
Network
Transport
24: uses a fiber-optic cable.
10Base-F
10Base5
10Base2
10Base-T
25: What was the main drawback of the ALOHA Random-Access method?
Redundancy in Data
Potential Collision
Inconsistent Data rate
All of the given.
26: The……….protocol uses both flow and error control.
ICMP
Stop-and-Wait
HDLC
TCP/IP
27: In which controlled-access method all data exchanges must be made through the primary device even when the ultimate destination is a secondary device?
Polling
Port Forwarding
Token Passing
Reservation
28: To control and manage the transfer of data, a protocol called Point-to-Point Protocol (PPP) is used at the layer.
Physical
Data link
Presentation
Network
29: Congestion Control is a feature of
Data Link
Transport
Network
All mentioned
30: No matter whether the link is dedicated or broadcast, the data link control (DLC) layer provides services between
Source and destination PCs
Tow adjacent nodes
Virtual LANS
Ethernet links
31: The payload field of the PPP frame is of variable size and it can carry maximum data up to
500 bytes
100 bytes
10 bytes
1500 bytes
32: In even parity check code, the value of syndrome is if the number of 1s is even.
2
0
7
8
33: The extra bits added with the original data for error detection/correction are called
Redundant bits
Port numbers
Fault bits
Process IDs
34: The payload field of the PPP frame is of variable size and it can carry maximum data up to
500 bytes
100 bytes
10 bytes
1500 bytes
35: In the Ethernet frame, both destination and sender addresses are of length.
6 bytes
1 byte
4 byte
2 byte
36: protocol, the sender sends one frame at a time and waits for an acknowledgment before sending the next one.
Stop-and-Wait
Selective-Repeat
Simple
Go-Back-N
37: A personal computer or workstation on an Ethernet network must have a card.
TDI
NIC
PCI
None of the given
38: In Leach band is reserved for a specific station and it belongs to the station all the time.
CDMA
TDMA
CSMA
FDMA
39: Error correction is more than the error detection.
Informal
Useless
Easy
Difficult
40: When we represent the data in CDMA, if a stat then it sends_
1
-1
0
Infinity
41: In order to resolve the link-layer address of the new first generated ARP request is always in
Multicast
Unicast
Broadcast
Multiplex
Conclusion
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