Computer Networking MCQs

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Computer Networking MCQs

Practice Computer Networking MCQs covering LAN, MAN, WAN, PAN, topology, modem, router, hub, switch and IP address concepts.

325
Total Questions

Practice Questions

Page 16 of 17
Question #301
What is the primary operational objective of the Dynamic Host Configuration Protocol (DHCP) framework?
A. To map alphanumeric domain paths to server IP records.
B. To encrypt frame headers across a network interface.
C. To automatically assign temporary logical IP address configurations and subnets to connecting network client devices.
D. To manage physical hardware MAC sorting rules.
Discuss
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Correct Answer: Option C

Explanation:
DHCP automatically assigns IP addresses, subnet masks, and default gateways to devices when they connect to a network.
This question belongs to: Computer Computer Networking
Question #302
Which type of network connection restricts communication to a single data direction permanently, with no option for bidirectional traffic loops?
A. Multiplex link
B. Full-Duplex link
C. Simplex link
D. Half-Duplex link
Discuss
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Correct Answer: Option C

Explanation:
Simplex communication is strictly unidirectional, meaning one device transmits while the other can only receive data.
This question belongs to: Computer Computer Networking
Question #303
How many total bits define a single logical IPv4 network address configuration?
A. 64 bits
B. 32 bits
C. 48 bits
D. 128 bits
Discuss
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Correct Answer: Option B

Explanation:
An IPv4 address is a 32-bit logical identifier, typically written as four 8-bit octets separated by dots.
This question belongs to: Computer Computer Networking
Question #304
Which network topology layout links every node to a single shared central communication line known as the network backbone?
A. Mesh Topology
B. Bus Topology
C. Star Topology
D. Ring Topology
Discuss
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Correct Answer: Option B

Explanation:
A bus topology connects all devices to a single shared central cable, often called the backbone line.
This question belongs to: Computer Computer Networking
Question #305
What is the primary role of the Domain Name System (DNS) in computer networks?
A. To assign dynamic IP addresses to workstations on boot.
B. To translate human-readable domain names into machine-routable numerical IP addresses.
C. To resolve hardware MAC pointers to subnet masks.
D. To translate private IP paths to public gateway channels.
Discuss
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Correct Answer: Option B

Explanation:
DNS translates alphanumeric domain names (like [www.example.com](https://www.example.com)) into the numerical IP addresses used by computers to route data.
This question belongs to: Computer Computer Networking
Question #306
Which type of network covers an individual's immediate personal space, typically using Bluetooth to sync a smartwatch and phone within a 10-meter radius?
A. PAN
B. WAN
C. LAN
D. MAN
Discuss
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Correct Answer: Option A

Explanation:
A Personal Area Network (PAN) connects personal electronic devices immediately surrounding an individual user.
This question belongs to: Computer Computer Networking
Question #307
What default subnet mask is mapped to standard Class A IP network address tracks under traditional classful sorting models?
A. 255.255.255.0
B. 255.0.0.0
C. 255.255.0.0
D. 255.255.255.255
Discuss
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Correct Answer: Option B

Explanation:
Class A networks allocate the first 8 bits (octet) to the network ID, which corresponds to a default subnet mask of 255.0.0.0.
This question belongs to: Computer Computer Networking
Question #308
Which device uses an internal bridging engine to isolate network traffic by individual ports, delivering full-duplex channels to each connected node?
A. Signal Terminator
B. Layer 1 Hub
C. Analog Modem
D. Layer 2 Switch
Discuss
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Correct Answer: Option D

Explanation:
A switch operates at Layer 2 to segment a network, providing dedicated, full-duplex communication channels for each individual port.
This question belongs to: Computer Computer Networking
Question #309
What happens if a single computer loses power or its connection cable breaks in a standard unidirectional Ring Network configuration?
A. The entire network communication path is broken, stopping traffic across the ring.
B. The remaining devices shift to a bus topology configuration automatically.
C. The network splits into two fully operational sub-rings.
D. Data frames loop back through the gateway interface.
Discuss
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Correct Answer: Option A

Explanation:
Because data travels sequentially from node to node around a ring topology, any break in the link disrupts the circuit and stops all network traffic.
This question belongs to: Computer Computer Networking
Question #310
Which IP address range specifies a Class C network identity under traditional classful routing protocols?
A. 1.0.0.0 to 126.255.255.255
B. 128.0.0.0 to 191.255.255.255
C. 192.0.0.0 to 223.255.255.255
D. 224.0.0.0 to 239.255.255.255
Discuss
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Correct Answer: Option C

Explanation:
Class C IP addresses use a first octet range from 192 to 223, commonly allocated for small-to-medium local networks.
This question belongs to: Computer Computer Networking
Question #311
What structural advantage does a full Mesh Topology layout offer compared to alternative network configurations?
A. It minimizes physical cabling costs.
B. It provides maximum fault tolerance and reliability by establishing direct redundant connections between all nodes.
C. It can operate without network interface cards.
D. It removes the requirement for hardware MAC profiles.
Discuss
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Correct Answer: Option B

Explanation:
Because a full mesh topology links every device directly to every other device, a failed line can be easily bypassed using alternative redundant paths.
This question belongs to: Computer Computer Networking
Question #312
Which technology allows a network router to translate private internal LAN IP addresses into a single public internet address, conserving global IPv4 address space?
A. Address Resolution lookup
B. Network Address Translation (NAT)
C. DHCP Allocation Pool
D. Domain Name mapping
Discuss
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Correct Answer: Option B

Explanation:
NAT maps private internal IP addresses to a public IP address, allowing multiple LAN devices to share a single internet connection.
This question belongs to: Computer Computer Networking
Question #313
How many total bits define a physical hardware MAC address embedded on a network interface chip?
A. 48 bits
B. 128 bits
C. 64 bits
D. 32 bits
Discuss
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Correct Answer: Option A

Explanation:
A MAC address is a permanent 48-bit physical hardware identifier, usually represented as 12 hexadecimal characters.
This question belongs to: Computer Computer Networking
Question #314
Which of the following is an IP address reserved exclusively for use within private internal networks?
A. 200.200.200.200
B. 8.8.4.4
C. 172.32.1.1
D. 192.168.1.50
Discuss
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Correct Answer: Option D

Explanation:
The 192.168.0.0 to 192.168.255.255 range is defined by RFC 1918 as a private Class C IP block reserved for internal networks.
This question belongs to: Computer Computer Networking
Question #315
What type of network architecture operates across a city-wide geographical region, linking multiple local area networks within a single municipality?
A. LAN
B. WAN
C. MAN
D. PAN
Discuss
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Correct Answer: Option C

Explanation:
A Metropolitan Area Network (MAN) is designed to connect computing resources across a city or regional municipal footprint.
This question belongs to: Computer Computer Networking
Question #316
Which device converts digital computer data into analog waveforms for transmission over older telephone lines, and decodes them back upon arrival?
A. Router
B. Modem
C. Bridge
D. Switch
Discuss
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Correct Answer: Option B

Explanation:
A modem modulates digital signals into analog waves for transmission over phone lines, and demodulates them back into digital data at the receiving end.
This question belongs to: Computer Computer Networking
Question #317
What is the purpose of a network Subnet Mask configuration parameter?
A. To separate an IP address into its network identification segment and host identification segment.
B. To provide hardware encryption layers over frame headers.
C. To resolve hardware MAC addresses to web domain paths.
D. To switch data links between half and full-duplex transmission modes.
Discuss
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Correct Answer: Option A

Explanation:
A subnet mask uses binary bit masking to define which part of an IP address indicates the network identity and which part indicates the specific host device.
This question belongs to: Computer Computer Networking
Question #318
Which topology design features all client nodes wired directly to a central switch or hub, ensuring that a broken client cable only affects that single node?
A. Star Topology
B. Bus Topology
C. Ring Topology
D. Linear Topology
Discuss
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Correct Answer: Option A

Explanation:
In a star topology, each device connects back to a central switch via an isolated cable run, so a cable break only affects that specific device.
This question belongs to: Computer Computer Networking
Question #319
What notation standard is used to write out physical hardware MAC addresses for human configuration monitoring?
A. Binary data arrays
B. Six pairs of hexadecimal characters separated by colons or hyphens
C. Base-64 string fields
D. Dotted decimal values
Discuss
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Correct Answer: Option B

Explanation:
MAC addresses are written as six pairs of hexadecimal digits separated by colons or dashes (e.g., 00:11:22:33:44:55).
This question belongs to: Computer Computer Networking
Question #320
Which network protocol automatically assigns IP address leases and gateway configuration paths to client devices when they boot up?
A. ICMP
B. NAT
C. DHCP
D. ARP
Discuss
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Correct Answer: Option C

Explanation:
DHCP dynamically manages network configuration parameters, automatically assigning IP leases to devices when they connect to the network.
This question belongs to: Computer Computer Networking

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