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 12 of 17
Question #221
What is the primary benefit of upgrading a legacy hub-driven network to a modern network switch infrastructure?
A. It eliminates collisions by creating dedicated collision domains for each connected port.
B. It forces the network to run over analog modems.
C. It removes the requirement for IP addressing rules.
D. It decreases the maximum physical cable length limits.
Discuss
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Correct Answer: Option A

Explanation:
Switches separate each port into its own collision domain. This eliminates collision risks, allowing for full-duplex data transfers.
This question belongs to: Computer Computer Networking
Question #222
Which IP address class allocates the first two octets to identify the network portion and the remaining two octets for host devices, using a default mask of 255.255.0.0?
A. Class A
B. Class C
C. Class D
D. Class B
Discuss
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Correct Answer: Option D

Explanation:
Class B addresses use a 16-bit network prefix, spanning an initial octet range from 128 to 191.
This question belongs to: Computer Computer Networking
Question #223
What type of network architecture operates across decentralized nodes where every computer can act as both a client and a resource-sharing server to other machines?
A. Peer-to-Peer (P2P) Network
B. Client-Server Network
C. Mainframe Terminal Network
D. Centralized Bus Network
Discuss
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Correct Answer: Option A

Explanation:
In a P2P network, there is no centralized server. Each node shares equal privilege and can distribute data blocks directly to other nodes.
This question belongs to: Computer Computer Networking
Question #224
Which technology translates human-readable domain names (like [www.example.com](https://www.example.com)) into machine-routable numerical IP addresses?
A. DNS (Domain Name System)
B. ARP
C. NAT
D. DHCP
Discuss
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Correct Answer: Option A

Explanation:
DNS is a distributed database system that translates alphanumeric web domain strings into corresponding target IP locations.
This question belongs to: Computer Computer Networking
Question #225
What is the maximum number of usable host addresses available within a standard, un-subnetted Class C network block?
A. 512
B. 256
C. 254
D. 128
Discuss
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Correct Answer: Option C

Explanation:
A Class C network has 256 addresses total, but 2 are reserved (one for the network ID and one for the broadcast address), leaving 254 usable host slots.
This question belongs to: Computer Computer Networking
Question #226
In a physical Bus Topology, what happens if the main backbone cable line is cut anywhere along its length?
A. The line switches to half-frequency full-duplex mode.
B. The network splits into two separate, fully functional subnets.
C. The nearest node transforms into a hub automatically.
D. All signal termination fails, causing massive signal bounce that disrupts communication across the entire layout.
Discuss
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Correct Answer: Option D

Explanation:
A sever in a bus network removes proper termination, causing signal reflection that corrupts data traffic for all connected devices.
This question belongs to: Computer Computer Networking
Question #227
Which of the following represents a key characteristic of 'Full-Duplex' network communication?
A. Data requires analog modulation steps at every connection node.
B. Data must pause at every node before moving forward.
C. Data can be transmitted in only one direction permanently.
D. Data can be transmitted and received simultaneously over the same link channel.
Discuss
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Correct Answer: Option D

Explanation:
Full-duplex allows simultaneous bidirectional transmission, effectively doubling potential throughput compared to half-duplex links.
This question belongs to: Computer Computer Networking
Question #228
What type of device can look across diverse network layers to translate completely different protocol stacks, such as connecting a corporate LAN to a proprietary mainframe network?
A. Gateway
B. Passive Switch
C. Repeater
D. BNC Terminator
Discuss
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Correct Answer: Option A

Explanation:
Gateways operate across multiple protocol layers to translate formatting and communication rules between completely different network architectures.
This question belongs to: Computer Computer Networking
Question #229
Which network topology layout maps every device sequentially along a single continuous cable path, resembling a closed circular loop with no open endpoints?
A. Bus Topology
B. Tree Topology
C. Ring Topology
D. Star Topology
Discuss
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Correct Answer: Option C

Explanation:
A ring topology connects devices in a continuous loop, where each station receives and repeats data frames until they reach their destination.
This question belongs to: Computer Computer Networking
Question #230
What is the specific bit length allocated to define a single unique IPv6 address framework?
A. 64 bits
B. 48 bits
C. 32 bits
D. 128 bits
Discuss
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Correct Answer: Option D

Explanation:
IPv6 utilizes 128-bit addressing, providing a vastly larger address pool compared to the 32-bit limits of IPv4.
This question belongs to: Computer Computer Networking
Question #231
Which type of network environment covers a corporate office spanning multiple high-rise buildings across an entire urban district or metropolitan area?
A. LAN
B. WAN
C. MAN
D. PAN
Discuss
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Correct Answer: Option C

Explanation:
A Metropolitan Area Network (MAN) is optimized to connect computing resources across city-wide or regional municipal scopes.
This question belongs to: Computer Computer Networking
Question #232
What hardware component is installed inside a computer tower to provide a physical connection port for an Ethernet cable or network medium?
A. Modem Chipset
B. Analog Gateway Block
C. Network Interface Card (NIC)
D. Bus Terminator Plug
Discuss
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Correct Answer: Option C

Explanation:
The NIC (Network Interface Card) houses the physical circuitry and MAC address required to interface a computer with network cabling.
This question belongs to: Computer Computer Networking
Question #233
Which of the following is a private IP address belonging strictly to the Class B network registry block?
A. 10.150.1.1
B. 172.16.50.4
C. 224.0.0.1
D. 192.168.10.5
Discuss
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Correct Answer: Option B

Explanation:
The private Class B IP range spans from 172.16.0.0 to 172.31.255.255, as defined by RFC 1918.
This question belongs to: Computer Computer Networking
Question #234
Which networking utility uses ICMP echo requests to verify if a remote host target is online and measure round-trip network response times?
A. IPCONFIG
B. PING
C. TRACERT
D. NSLOOKUP
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Correct Answer: Option B

Explanation:
The ping command utilizes ICMP Echo Request and Echo Reply packets to test basic network connectivity and record latency metrics.
This question belongs to: Computer Computer Networking
Question #235
What basic operational weakness is shared by both Bus and Star topologies if their respective central shared medium (backbone line or central switch) fails completely?
A. They automatically switch to high-frequency multicast mode.
B. They suffer a single point of failure that can cause total network collapse.
C. They require dynamic analog rewiring steps.
D. They experience an instantaneous duplication of MAC addresses.
Discuss
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Correct Answer: Option B

Explanation:
If the core backbone cable in a bus topology or the central switch in a star topology fails, the entire connected network collapses.
This question belongs to: Computer Computer Networking
Question #236
Which type of network connection allows communication to flow in only one direction permanently, with no way to send responses back (e.g., traditional television broadcasting)?
A. Full-Duplex
B. Multiplex
C. Simplex
D. Half-Duplex
Discuss
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Correct Answer: Option C

Explanation:
Simplex communication is strictly unidirectional, meaning one station transmits while the other can only receive.
This question belongs to: Computer Computer Networking
Question #237
What is the structural network layout where every node is connected to a central cable line, which acts as the shared communication trunk?
A. Mesh Topology
B. Bus Topology
C. Ring Topology
D. Star Topology
Discuss
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Correct Answer: Option B

Explanation:
Bus topology connects all devices to a single shared central cable, known as the bus or backbone line.
This question belongs to: Computer Computer Networking
Question #238
Which address space is specifically allocated globally for network diagnostics, mapping to the 'localhost' designation inside client operating software configurations?
A. 127.0.0.1
B. 192.168.1.254
C. 10.0.0.1
D. 255.255.255.255
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Correct Answer: Option A

Explanation:
The 127.0.0.1 loopback address routes packets back internally within the local device's TCP/IP stack to support software testing.
This question belongs to: Computer Computer Networking
Question #239
What type of network environment connects banking centers across separate global capitals through dedicated transoceanic fiber-optic links?
A. LAN
B. PAN
C. MAN
D. WAN
Discuss
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Correct Answer: Option D

Explanation:
A Wide Area Network (WAN) spans immense geographical scales, linking regional networks across countries and oceans.
This question belongs to: Computer Computer Networking
Question #240
Which device functions exclusively at the physical layer of the OSI model to amplify or regenerate weak electrical or optical network signals over extended distances?
A. Bridge
B. Repeater
C. Router
D. Gateway
Discuss
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Correct Answer: Option B

Explanation:
A repeater acts at Layer 1 to boost incoming electrical or optical signals, counteracting signal attenuation across long cable runs.
This question belongs to: Computer Computer Networking

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