Computer Networking MCQs
Practice Computer Networking MCQs covering LAN, MAN, WAN, PAN, topology, modem, router, hub, switch and IP address concepts.
Question #11
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What does a modem do?
Correct Answer: Option A
Explanation:
A modem (modulator-demodulator) converts digital data from a computer to analog for transmission over telephone lines and vice versa.
A modem (modulator-demodulator) converts digital data from a computer to analog for transmission over telephone lines and vice versa.
This question belongs to:
Computer
Computer Networking
Question #12
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Which of the following is a private IP address range?
Correct Answer: Option D
Explanation:
10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are private IP ranges. 10.x.x.x is valid.
10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are private IP ranges. 10.x.x.x is valid.
This question belongs to:
Computer
Computer Networking
Question #13
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Which IP address class has the first octet range of 1 to 126?
Correct Answer: Option B
Explanation:
Class A addresses range from 1.0.0.0 to 126.255.255.255, with first bit 0.
Class A addresses range from 1.0.0.0 to 126.255.255.255, with first bit 0.
This question belongs to:
Computer
Computer Networking
Question #14
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What is the default subnet mask for a Class C IP address?
Correct Answer: Option A
Explanation:
Class C has a default subnet mask of 255.255.255.0, providing up to 254 hosts.
Class C has a default subnet mask of 255.255.255.0, providing up to 254 hosts.
This question belongs to:
Computer
Computer Networking
Question #15
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Which network topology provides the highest redundancy because each device is connected to every other?
Correct Answer: Option C
Explanation:
Full mesh topology connects each node to every other, offering multiple paths and high redundancy.
Full mesh topology connects each node to every other, offering multiple paths and high redundancy.
This question belongs to:
Computer
Computer Networking
Question #16
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What is the maximum number of hosts per network in a Class C IP address?
Correct Answer: Option D
Explanation:
Class C provides 8 bits for hosts (2^8 - 2 = 254 usable hosts).
Class C provides 8 bits for hosts (2^8 - 2 = 254 usable hosts).
This question belongs to:
Computer
Computer Networking
Question #17
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Which OSI layer is responsible for routing and logical addressing?
Correct Answer: Option C
Explanation:
The network layer (Layer 3) handles routing and logical addressing like IP addresses.
The network layer (Layer 3) handles routing and logical addressing like IP addresses.
This question belongs to:
Computer
Computer Networking
Question #18
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What is a MAC address?
Correct Answer: Option A
Explanation:
MAC (Media Access Control) address is a 48-bit unique identifier assigned to network interfaces.
MAC (Media Access Control) address is a 48-bit unique identifier assigned to network interfaces.
This question belongs to:
Computer
Computer Networking
Question #19
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Which device is used to connect multiple network segments and reduce collision domains?
Correct Answer: Option A
Explanation:
A switch isolates each port into a separate collision domain, reducing collisions.
A switch isolates each port into a separate collision domain, reducing collisions.
This question belongs to:
Computer
Computer Networking
Question #20
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What is the range of port numbers for well-known (system) ports in TCP/IP?
Correct Answer: Option B
Explanation:
Well-known ports are 0-1023, registered ports 1024-49151, and dynamic/private ports 49152-65535.
Well-known ports are 0-1023, registered ports 1024-49151, and dynamic/private ports 49152-65535.
This question belongs to:
Computer
Computer Networking
