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 13 of 17
Question #241
What is the primary role of a subnet mask when paired with an active IPv4 address value?
A. To toggle networks between half and full-duplex transmission modes.
B. To explicitly delineate the network routing segment from the unique host identifier segment.
C. To provide physical encryption layers over frame headers.
D. To resolve hardware MAC pointers to domain paths.
Discuss
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Correct Answer: Option B

Explanation:
The subnet mask uses binary bit masking to indicate which part of an IP address refers to the network identity and which part refers to the host device.
This question belongs to: Computer Computer Networking
Question #242
Which topology design provides an exceptionally robust environment where the failure of any single connection line affects only the device connected to that specific line?
A. Star Topology
B. Bus Topology
C. Linear Topology
D. Ring Topology
Discuss
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Correct Answer: Option A

Explanation:
In a star topology, each node uses an isolated cable run to connect to a central switch. A break in one cable only disconnects that specific device.
This question belongs to: Computer Computer Networking
Question #243
What notation standard is used to readably display 48-bit physical MAC hardware addresses?
A. Binary character arrays
B. Dotted decimal integers
C. Hexadecimal alphanumeric pairs separated by colons or hyphens
D. Base-64 string values
Discuss
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Correct Answer: Option C

Explanation:
MAC addresses are written as six pairs of hexadecimal digits separated by colons or dashes (e.g., 00:1A:2B:3C:4D:5E).
This question belongs to: Computer Computer Networking
Question #244
Which protocol can automatically configure a workstation with an IP address, subnet mask, default gateway, and DNS paths upon boot?
A. ARP
B. ICMP
C. DHCP
D. NAT
Discuss
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Correct Answer: Option C

Explanation:
DHCP dynamically manages network configuration parameters, automatically assigning IP leases to client devices on startup.
This question belongs to: Computer Computer Networking
Question #245
Which device segment can map logical names to physical IP pathways, functioning as the primary directory index framework of the public internet?
A. DHCP Allocation Pool
B. Address Resolution Protocol (ARP) index
C. Domain Name System (DNS)
D. Network Address Translation (NAT) table
Discuss
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Correct Answer: Option C

Explanation:
DNS functions as a public directory system, converting human-readable web domains into numerical IP locations.
This question belongs to: Computer Computer Networking
Question #246
In a network configured with a physical Star Topology, what component serves as the central interconnect node that relays data signals among all devices?
A. Terminator block
B. BNC T-Connector
C. Network Interface Card
D. Central Switch or Hub
Discuss
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Correct Answer: Option D

Explanation:
A star topology relies on a centralized device, such as a switch or hub, to distribute communication across all connected nodes.
This question belongs to: Computer Computer Networking
Question #247
What is the default subnet mask assigned to standard Class C IP addresses under traditional classful addressing configurations?
A. 255.0.0.0
B. 255.255.255.255
C. 255.255.255.0
D. 255.255.0.0
Discuss
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Correct Answer: Option C

Explanation:
Class C networks allocate 24 bits to the network ID, which corresponds to a default subnet mask of 255.255.255.0.
This question belongs to: Computer Computer Networking
Question #248
Which network type connects computing resources within a single house to manage smart appliances, laptops, and streaming boxes safely?
A. SAN
B. LAN
C. WAN
D. MAN
Discuss
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Correct Answer: Option B

Explanation:
A home network is classified as a Local Area Network (LAN), connecting devices within a single residential structure.
This question belongs to: Computer Computer Networking
Question #249
What operational feature distinguishes an intelligent network switch from a basic hardware hub?
A. Switches use analog modulation steps exclusively.
B. Switches lack physical Ethernet connections.
C. Switches run entirely at the physical layer without checking data links.
D. Switches analyze incoming frames and forward them directly to specific ports based on destination MAC addresses.
Discuss
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Correct Answer: Option D

Explanation:
Switches inspect incoming frames at Layer 2, using an internal MAC address table to forward data directly to the target port rather than broadcasting it to all ports.
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Question #250
Which IP address range indicates a Class A network identity under traditional routing rules?
A. 192.0.0.0 to 223.255.255.255
B. 1.0.0.0 to 126.255.255.255
C. 128.0.0.0 to 191.255.255.255
D. 224.0.0.0 to 239.255.255.255
Discuss
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Correct Answer: Option B

Explanation:
Class A IP addresses utilize the first octet range from 1 to 126 (excluding 127 which is reserved for loopback diagnostics).
This question belongs to: Computer Computer Networking
Question #251
What structural benefit does a Mesh Topology offer compared to alternative network layouts?
A. It removes the requirement for hardware MAC profiles.
B. It provides extreme fault tolerance and redundancy by creating alternative communication pathways.
C. It minimizes physical cabling requirements.
D. It can operate without any network interface cards.
Discuss
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Correct Answer: Option B

Explanation:
Because mesh networks provide multiple redundant connections between nodes, communication can bypass broken lines via alternative paths.
This question belongs to: Computer Computer Networking
Question #252
Which mechanism enables an internet router to modify packet headers, allowing thousands of private internal LAN hosts to navigate the web through a single public IP address?
A. DHCP lease management
B. Address Resolution lookup
C. Network Address Translation (NAT)
D. Domain Name mapping
Discuss
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Correct Answer: Option C

Explanation:
NAT converts private internal IP addresses to a public IP address, conserving IPv4 space and adding an extra layer of internal security.
This question belongs to: Computer Computer Networking
Question #253
How many total bits comprise a standard physical hardware MAC address etched into a network interface chip?
A. 48 bits
B. 64 bits
C. 32 bits
D. 128 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 #254
Which of the following is a private IP address designated for exclusive use within local area networks?
A. 10.0.0.1
B. 200.100.50.1
C. 168.192.1.1
D. 8.8.8.8
Discuss
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Correct Answer: Option A

Explanation:
The 10.0.0.0 to 10.255.255.255 range is defined by RFC 1918 as a private Class A IP block reserved for internal networks.
This question belongs to: Computer Computer Networking
Question #255
What specialized technology enables data networks to handle both voice calls and standard data traffic over a single unified IP infrastructure?
A. DHCP
B. VoIP (Voice over IP)
C. NAT
D. ARP
Discuss
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Correct Answer: Option B

Explanation:
VoIP converts analog voice audio into digital packets, allowing phone calls to travel over standard IP networks.
This question belongs to: Computer Computer Networking
Question #256
Which network topology layout connects adjacent devices in a continuous line with no central controller, terminating cleanly at two distinct endpoints?
A. Linear Bus Topology
B. Star Topology
C. Ring Topology
D. Mesh Topology
Discuss
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Correct Answer: Option A

Explanation:
A linear bus topology links all nodes in a sequential chain along a single cable path that features endpoints at both ends.
This question belongs to: Computer Computer Networking
Question #257
What does an IPv4 address configuration use to determine the broadcast address for a specific subnet?
A. The MAC registration lookup
B. The network mask and host bit combinations
C. The loopback hardware interface
D. The external DNS resolution system
Discuss
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Correct Answer: Option B

Explanation:
Setting all host bits of an IP network block to binary 1 yields the specific broadcast address used to send data to all devices on that subnet.
This question belongs to: Computer Computer Networking
Question #258
Which type of network spans across multiple office locations in different cities or states, typically requiring leased telecommunication lines?
A. MAN
B. WAN
C. PAN
D. LAN
Discuss
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Correct Answer: Option B

Explanation:
A Wide Area Network (WAN) connects separate business branches across regional, national, or global boundaries.
This question belongs to: Computer Computer Networking
Question #259
Which hardware device works at Layer 3 of the OSI model, tracking network path metrics to route packets across separate networks?
A. Layer 3 Router
B. Layer 2 Bridge
C. Layer 1 Repeater
D. Passive Hub Array
Discuss
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Correct Answer: Option A

Explanation:
Routers operate at the Network Layer (Layer 3), managing data routing across separate subnets based on logical destination IP addresses.
This question belongs to: Computer Computer Networking
Question #260
What condition occurs on a shared bus network if multiple stations attempt to transmit data frames over the backbone line simultaneously?
A. MAC address duplication
B. Signal termination bypass
C. Automatic loopback routing
D. Data Collision
Discuss
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Correct Answer: Option D

Explanation:
Data collisions occur when multiple devices transmit signals over a shared electrical medium simultaneously, garbling the data frames.
This question belongs to: Computer Computer Networking

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