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Module 1 Final Quiz: Introduction to Computer Networks MCQs
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1
Which type of network spans a single room or personal space within approximately 10 meters, typically using Bluetooth or NFC?
A.
MAN (Metropolitan Area Network)
B.
PAN (Personal Area Network)
C.
WAN (Wide Area Network)
D.
SAN (Storage Area Network)
Explanation & Key
Correct Answer:
2
In a full mesh topology with 8 nodes, how many physical communication links are required?
A.
16 links
B.
28 links
C.
56 links
D.
64 links
Explanation & Key
Correct Answer:
3
What is the primary operational disadvantage of a Bus topology?
A.
It requires expensive active switches
B.
A physical break anywhere in the central backbone cable halts all communication across the entire network
C.
It cannot support more than 2 computers
D.
It uses only optical fiber
Explanation & Key
Correct Answer:
4
At which layer of the OSI model does a network Switch operate, and how does it forward frames?
A.
Layer 1 (Physical); broadcasts to all ports blindly
B.
Layer 2 (Data Link); maintains a MAC address table to forward frames directly to destination ports
C.
Layer 3 (Network); forwards based on IP routing tables
D.
Layer 4 (Transport); forwards based on TCP port numbers
Explanation & Key
Correct Answer:
5
What is the fundamental difference between a Hub and a Switch?
A.
Hubs have IP addresses; switches do not
B.
A hub is a Layer 1 device that blindly broadcasts every incoming bit out all ports; a switch is a Layer 2 device that forwards frames selectively based on MAC address
C.
A switch cannot connect to computers
D.
Hubs operate at Layer 3
Explanation & Key
Correct Answer:
6
Which networking device is required to interconnect two different IP subnets and route packets across the Internet?
A.
Repeater
B.
Router (Layer 3)
C.
Unmanaged Hub
D.
Coaxial Splitter
Explanation & Key
Correct Answer:
7
What is the primary role of a Gateway in computer networking?
A.
Boosting analog electrical signals on a wire
B.
Acting as a protocol converter that translates between two networks utilizing completely different protocol architectures and data formats
C.
Assigning MAC addresses to NIC cards
D.
Terminating twisted-pair cables
Explanation & Key
Correct Answer:
8
Why is Star topology the universal standard in modern Ethernet LANs?
A.
Because it requires zero cables
B.
Failure of a single node or peripheral cable does not affect any other node on the network, making maintenance and troubleshooting straightforward
C.
Because it eliminates the need for network switches
D.
Because data travels in a circular loop
Explanation & Key
Correct Answer:
9
What is Bandwidth in computer networks?
A.
The physical thickness of an Ethernet cable
B.
The maximum theoretical rate of data transfer across a given path per unit time (e.g. 10 Gbps)
C.
The time it takes for a bit to travel from sender to receiver
D.
The number of routers on the Internet
Explanation & Key
Correct Answer:
10
Which of the following devices breaks both collision domains and broadcast domains?
A.
Hub
B.
Repeater
C.
Switch
D.
Router
Explanation & Key
Correct Answer:
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