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 15 of 17
Question #281
Which device contains the unique physical MAC address hardware mapping, serving as the physical interface layer between a computer's bus tracks and an Ethernet line?
A. Central Hub
B. Analog Modem
C. Bus Terminator Plug
D. Network Interface Card (NIC)
Discuss
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Correct Answer: Option D

Explanation:
The NIC provides the physical interface and circuitry a computer needs to connect to network media, and carries a unique, hardcoded MAC address.
This question belongs to: Computer Computer Networking
Question #282
Which of the following IP addresses represents a Class C address based on classic classful network allocation hierarchies?
A. 192.168.1.25
B. 172.16.1.100
C. 225.0.0.1
D. 10.10.10.10
Discuss
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Correct Answer: Option A

Explanation:
Class C network addresses utilize a first octet range spanning from 192 to 223, commonly used for small local networks.
This question belongs to: Computer Computer Networking
Question #283
What specific task is performed by the Address Resolution Protocol (ARP) within a local area network segment?
A. It translates web domain names into IP paths.
B. It routes data packets across separate internet gateways.
C. It automatically assigns dynamic IP configurations to client devices.
D. It maps a known logical IP address to a physical hardware MAC address.
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Correct Answer: Option D

Explanation:
ARP maps logical IP network targets to their physical MAC hardware addresses within a local data link layer segment.
This question belongs to: Computer Computer Networking
Question #284
What notation standard is used to write and display modern 128-bit IPv6 address configurations readably?
A. Eight groups of four hexadecimal digits separated by colons
B. Dotted decimal fields
C. Binary bitstream flags
D. Base-64 character strings
Discuss
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Correct Answer: Option A

Explanation:
IPv6 addresses are formatted as eight groups of four hexadecimal digits separated by colons (e.g., 2001:0db8:0000:0000:0000:ff00:0042:8329).
This question belongs to: Computer Computer Networking
Question #285
Which topology integrates multiple star networks together by anchoring their central switches back to a primary shared bus backbone line?
A. Mesh Topology
B. Ring Topology
C. Tree Topology
D. Linear Topology
Discuss
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Correct Answer: Option C

Explanation:
A tree topology connects multiple star-configured subnets to a primary bus backbone or central root switch in a hierarchical layout.
This question belongs to: Computer Computer Networking
Question #286
What is the primary function of a network Default Gateway configuration point on a local client terminal?
A. To provide the routing IP path used to send data outside the local network segment.
B. To handle internal loopback software testing.
C. To generate dynamic MAC hardware masks.
D. To translate public domains to internal directory paths.
Discuss
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Correct Answer: Option A

Explanation:
The default gateway is the router interface address that a device uses to send traffic destined for networks outside its local subnet.
This question belongs to: Computer Computer Networking
Question #287
Which type of network connection allows communication to flow in both directions at the same time (e.g., a standard cellular phone conversation)?
A. Full-Duplex
B. Half-Duplex
C. Simplex
D. Asynchronous
Discuss
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Correct Answer: Option A

Explanation:
Full-duplex links support simultaneous bidirectional transmission, allowing devices to send and receive data at the same time.
This question belongs to: Computer Computer Networking
Question #288
What is the total number of unique host addresses that can be assigned to active devices within a standard Class C IP subnet mask block?
A. 128 host addresses
B. 256 host addresses
C. 254 host addresses
D. 512 host addresses
Discuss
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Correct Answer: Option C

Explanation:
While a standard Class C block contains 256 total addresses, the first address (network ID) and last address (broadcast address) are reserved, leaving 254 usable host slots.
This question belongs to: Computer Computer Networking
Question #289
Which hardware device works at Layer 1 of the OSI model to repeat network traffic across all ports, making all connected hosts share a single collision domain?
A. Bridge
B. Router
C. Switch
D. Hub
Discuss
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Correct Answer: Option D

Explanation:
A network hub acts as a simple Layer 1 repeater, broadcasting incoming data to all connected ports and placing them in a single collision domain.
This question belongs to: Computer Computer Networking
Question #290
What structural issue creates a single point of failure hazard in a standard network Star Topology configuration?
A. A break in any single client cable drops the entire network.
B. The endpoint terminators can burn out.
C. MAC addresses can conflict across ports automatically.
D. If the central hub or switch fails, all connected devices lose network connectivity.
Discuss
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Correct Answer: Option D

Explanation:
Because all devices in a star topology connect back to a central switch or hub, a failure in that central device disconnects the entire network.
This question belongs to: Computer Computer Networking
Question #291
Which address space range is reserved by the IETF for Automatic Private IP Addressing (APIPA) when a client cannot contact a DHCP server?
A. 169.254.0.0 to 169.254.255.255
B. 192.168.0.0 to 192.168.255.255
C. 127.0.0.0 to 127.255.255.255
D. 10.0.0.0 to 10.255.255.255
Discuss
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Correct Answer: Option A

Explanation:
The 169.254.0.0/16 address block is reserved for APIPA, allowing devices to automatically configure a temporary link-local IP address when DHCP is unavailable.
This question belongs to: Computer Computer Networking
Question #292
Which of the following parameters is used by an IPv4 router to ensure that a data packet cannot loop indefinitely across a network?
A. Time to Live (TTL) / Hop Limit field
B. MAC Destination header
C. Subnet Mask value
D. Loopback index flag
Discuss
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Correct Answer: Option A

Explanation:
The TTL field in an IPv4 header is decremented by 1 at each router hop. If the TTL reaches 0, the packet is dropped, preventing routing loops.
This question belongs to: Computer Computer Networking
Question #293
What structural architecture is used by a peer-to-peer (P2P) network model?
A. Nodes communicate exclusively via analog phone line modems.
B. A high-capacity central mainframe coordinates all data assets.
C. Devices connect to a single central cable using structural terminators.
D. Every computer node can act as both a client that requests data and a server that shares data directly with other devices.
Discuss
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Correct Answer: Option D

Explanation:
A P2P network distributes roles evenly across all nodes, allowing devices to share resources directly without a central server.
This question belongs to: Computer Computer Networking
Question #294
Which networking tool provides direct interactive configuration diagnostics by resolving alphanumeric website queries to their corresponding numerical IP records?
A. IPCONFIG
B. PING
C. NSLOOKUP
D. TRACERT
Discuss
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Correct Answer: Option C

Explanation:
The nslookup command queries DNS servers to look up or verify the IP address associated with a particular domain name.
This question belongs to: Computer Computer Networking
Question #295
What form of network topology links a master hub down to secondary hub nodes, which in turn connect to individual workstations in a multi-level hierarchy?
A. Tree / Hierarchical Star Topology
B. Ring Topology
C. Bus Topology
D. Mesh Topology
Discuss
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Correct Answer: Option A

Explanation:
A tree topology arranges star-configured subnets in a multi-level hierarchy connected back to a central root node.
This question belongs to: Computer Computer Networking
Question #296
Which type of device operates at Layer 7 of the OSI model to translate formatting and protocol rules between entirely incompatible network architectures?
A. Passive Hub block
B. Network Gateway
C. Layer 2 Switch
D. Layer 1 Repeater
Discuss
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Correct Answer: Option B

Explanation:
A gateway acts as a protocol converter, translating data formats and communication rules between completely different network architectures.
This question belongs to: Computer Computer Networking
Question #297
What happens on a shared Ethernet network using a Bus Topology layout if a data frame reaches either extreme physical endpoint without encountering a terminator component?
A. The data frame loops back through the local host interface automatically.
B. The signal transforms into an analog wave profile.
C. The data frame is safely archived on the primary server.
D. The signal bounces back along the cable, creating interference that corrupts ongoing network traffic.
Discuss
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Correct Answer: Option D

Explanation:
Without a terminator to absorb signals at the endpoints of a bus network, signal bounce creates interference that corrupts data traffic.
This question belongs to: Computer Computer Networking
Question #298
What type of network classification links computing nodes across an entire national state, global country, or international continent footprint?
A. MAN
B. PAN
C. LAN
D. WAN
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Correct Answer: Option D

Explanation:
A Wide Area Network (WAN) connects separate networks across broad geographic regions, such as countries or continents.
This question belongs to: Computer Computer Networking
Question #299
Which address block represents the standard 32-bit IPv4 multicast address group space under traditional classful sorting hierarchies?
A. 192.168.0.0 to 192.168.255.255
B. 0.0.0.0 to 127.255.255.255
C. 224.0.0.0 to 239.255.255.255
D. 240.0.0.0 to 255.255.255.255
Discuss
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Correct Answer: Option C

Explanation:
Class D addresses (224.0.0.0 to 239.255.255.255) are reserved globally for multicast traffic targeting specific groups of devices.
This question belongs to: Computer Computer Networking
Question #300
Which device uses a bridge layer to segment a local network into independent collision domains for each physical port while maintaining a single shared broadcast domain?
A. Layer 1 Hub
B. Layer 2 Switch
C. Analog Modem
D. Layer 3 Router
Discuss
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Correct Answer: Option B

Explanation:
A switch separates each port into its own dedicated collision domain, preventing collisions while passing broadcast traffic to all ports.
This question belongs to: Computer Computer Networking

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