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 14 of 17
Question #261
Which address space can be used by any network client to check the internal functionality of its own TCP/IP network protocol software stack?
A. 127.0.0.1
B. 192.168.1.1
C. 0.0.0.0
D. 255.255.255.255
Discuss
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Correct Answer: Option A

Explanation:
127.0.0.1 is the standard loopback address. It lets a device route diagnostic traffic back through its internal software layer without hitting physical network lines.
This question belongs to: Computer Computer Networking
Question #262
What type of network architecture designates a high-capacity central machine to host resources, validate logins, and manage security parameters for all connected client systems?
A. Decentralized Mesh Mesh
B. Client-Server Model
C. Linear Bus Pattern
D. Peer-to-Peer Model
Discuss
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Correct Answer: Option B

Explanation:
A client-server model uses a centralized server to manage security, databases, and network administration, responding to requests from client workstations.
This question belongs to: Computer Computer Networking
Question #263
Which protocol works automatically to resolve local IP addresses to physical hardware addresses on an Ethernet network segment?
A. NAT
B. DNS
C. ARP (Address Resolution Protocol)
D. DHCP
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Correct Answer: Option C

Explanation:
ARP converts logical IP targets into corresponding physical MAC addresses within a local data link layer segment.
This question belongs to: Computer Computer Networking
Question #264
What is the primary technical reason for the ongoing migration from traditional IPv4 address configurations to modern IPv6 address pools?
A. IPv4 lacks compatibility with wireless devices.
B. IPv4 requires manual analog modulation adjustments.
C. The 32-bit address space of IPv4 cannot provide enough unique addresses for the global volume of internet-connected devices.
D. IPv4 cannot route multimedia payloads.
Discuss
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Correct Answer: Option C

Explanation:
The growth of internet-connected devices has exhausted the ~4.3 billion addresses available under the 32-bit IPv4 pool, necessitating the 128-bit capacity of IPv6.
This question belongs to: Computer Computer Networking
Question #265
In a network configured with a hierarchical Tree Topology, what happens if the primary central root device fails completely?
A. All data lines transition to half-duplex speed profiles.
B. The entire connected network structure collapses and communications stop.
C. Isolated sub-branches can still communicate locally, but communication across separate branches is broken.
D. The network switches to full-mesh configuration automatically.
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Correct Answer: Option C

Explanation:
In a tree topology, a root failure isolates separate sub-star branches from each other, though individual branches may still function
This question belongs to: Computer Computer Networking
Question #266
Which type of device converts digital binary signals from a computer interface into analog patterns to transmit them over older public telephone lines?
A. Bridge
B. Switch
C. Router
D. Modem
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Correct Answer: Option D

Explanation:
A modem modulates digital data into analog waves for transmission over telephone copper lines, and demodulates them back upon reception.
This question belongs to: Computer Computer Networking
Question #267
What is the total number of hexadecimal characters used to write out a standard 48-bit MAC address string?
A. 32 characters
B. 16 characters
C. 12 characters
D. 8 characters
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Correct Answer: Option C

Explanation:
A 48-bit MAC address is represented by 12 hexadecimal characters arranged in 6 pairs (e.g., AA:BB:CC:DD:EE:FF).
This question belongs to: Computer Computer Networking
Question #268
Which address class specifies an initial octet value spanning from 128 to 191 under traditional classful IP routing protocols?
A. Class D
B. Class B
C. Class C
D. Class A
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Correct Answer: Option B

Explanation:
Class B IP addresses feature a first octet ranging from 128 to 191, typically mapped to medium-sized corporate networks.
This question belongs to: Computer Computer Networking
Question #269
What happens if a terminator component is missing from either end of a traditional coaxial Bus Network line?
A. The data frame sizes double automatically.
B. The network transitions to a wireless ring structure.
C. The system re-routes all traffic to the loopback interface.
D. Signals reflect back along the cable when they hit the open end, causing signal corruption that drops the network.
Discuss
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Correct Answer: Option D

Explanation:
Without a terminator to absorb signals at the physical endpoints of a bus network, signal bounce corrupts ongoing data traffic.
This question belongs to: Computer Computer Networking
Question #270
Which type of network area classification connects peripheral accessories like a wireless mouse and headphones to a user's laptop?
A. MAN
B. PAN
C. WAN
D. LAN
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Correct Answer: Option B

Explanation:
A Personal Area Network (PAN) handles short-range data connections for personal electronic devices close to an individual.
This question belongs to: Computer Computer Networking
Question #271
What layer of the OSI model does an intelligent network switch use to read hardware MAC addresses and make data forwarding choices?
A. Physical Layer (Layer 1)
B. Application Layer (Layer 7)
C. Network Layer (Layer 3)
D. Data Link Layer (Layer 2)
Discuss
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Correct Answer: Option D

Explanation:
Switches operate at the Data Link Layer (Layer 2), using hardware MAC addresses to forward data frames across local network segments.
This question belongs to: Computer Computer Networking
Question #272
Which of the following is a key operational drawback of using a basic hardware hub instead of a network switch?
A. Hubs cannot interface with Ethernet cabling.
B. Hubs broadcast all incoming traffic to every connected port, which reduces available bandwidth and increases data collision risks.
C. Hubs alter the physical MAC addresses of packets.
D. Hubs require manual IP allocation steps.
Discuss
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Correct Answer: Option B

Explanation:
Because a hub lacks forwarding logic, it repeats incoming data to all ports, creating a single shared collision domain that reduces performance.
This question belongs to: Computer Computer Networking
Question #273
What default subnet mask is associated with Class B IP networks under traditional classful network addressing parameters?
A. 255.255.255.0
B. 255.255.0.0
C. 255.255.255.255
D. 255.0.0.0
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Correct Answer: Option B

Explanation:
Class B networks default to a 16-bit prefix length, which maps to a default subnet mask of 255.255.0.0.
This question belongs to: Computer Computer Networking
Question #274
Which network topology layout creates a fully redundant matrix where every device shares a direct point-to-point connection with every other device?
A. Star Topology
B. Tree Topology
C. Ring Topology
D. Full Mesh Topology
Discuss
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Correct Answer: Option D

Explanation:
A full mesh topology links every node directly to every other node, maximizing fault tolerance and redundancy.
This question belongs to: Computer Computer Networking
Question #275
Which mechanism acts as the primary tool to translate internal private LAN IP configurations into public internet-facing addresses?
A. DHCP Allocation
B. Domain Name mapping
C. Address Resolution Protocol
D. Network Address Translation (NAT)
Discuss
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Correct Answer: Option D

Explanation:
NAT maps private IP addresses to a public IP address, allowing multiple internal LAN devices to access the internet via a single public connection.
This question belongs to: Computer Computer Networking
Question #276
How many total octets are used to construct a standard 32-bit IPv4 network address configuration?
A. 8 octets
B. 6 octets
C. 2 octets
D. 4 octets
Discuss
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Correct Answer: Option D

Explanation:
An IPv4 address contains 32 bits divided into 4 octets (8 bits each), separated by dots in decimal format.
This question belongs to: Computer Computer Networking
Question #277
Which type of network spans an entire city or metropolitan municipal district, linking multiple business offices and schools together?
A. LAN
B. MAN
C. WAN
D. PAN
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Correct Answer: Option B

Explanation:
A Metropolitan Area Network (MAN) is optimized to connect resources across city-wide or regional municipal scopes.
This question belongs to: Computer Computer Networking
Question #278
Which network utility allows an administrator to view the exact sequence of routers and hops that a data packet traverses to reach a remote server?
A. TRACERT / TRACEROUTE
B. IPCONFIG
C. NSLOOKUP
D. PING
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Correct Answer: Option A

Explanation:
The traceroute (Unix) or tracert (Windows) command maps a packet's path through a network, listing each intermediate hop and router interface.
This question belongs to: Computer Computer Networking
Question #279
What condition happens in a standard unidirectional Ring Topology if a single computer terminal loses power or its cable breaks?
A. The remaining nodes configure themselves into a star topology.
B. The network automatically transitions to wireless transmission.
C. Data frames flow twice as fast in the opposite direction.
D. The network communication loop is broken, stopping data traffic across the entire ring.
Discuss
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Correct Answer: Option D

Explanation:
Because data travels sequentially around a unidirectional ring network, any single broken link breaks the circuit and disrupts the entire network.
This question belongs to: Computer Computer Networking
Question #280
What type of communication channel allows data to move in both directions, but only one direction at a time (e.g., a standard citizen band radio)?
A. Half-Duplex
B. Simplex
C. Full-Duplex
D. Multiplex
Discuss
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Correct Answer: Option A

Explanation:
Half-duplex communication allows bidirectional traffic, but devices must alternate sending and receiving to prevent data collisions.
This question belongs to: Computer Computer Networking

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