Which technology translates human-readable domain names (like [www.example.com](https://www.example.com)) into machine-routable numerical IP addresses? MCQ with Answer and Explanation

Question

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. DHCP

D. NAT

Answer: Option A

Solution (By JKSSB Mock Tests)

DNS is a distributed database system that translates alphanumeric web domain strings into corresponding target IP locations.

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Which layer of the OSI model is responsible for end-to-end error recovery and flow control?

A. Session layer

B. Transport layer

C. Data link layer

D. Network layer

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Correct Answer: Option B

Explanation:
The transport layer (e.g., TCP) provides reliable data transfer, error recovery, and flow control.

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Question #2

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What is a MAC address?

A. A 48-bit physical address burned into the NIC

B. A 16-bit port number

C. A 32-bit logical address

D. A 64-bit address used for IPv6

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Correct Answer: Option A

Explanation:
MAC (Media Access Control) address is a 48-bit unique identifier assigned to network interfaces.

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Question #3

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What is the role of a firewall in a network?

A. To protect against unauthorized access

B. To boost signal

C. To assign IP addresses

D. To route packets

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Correct Answer: Option A

Explanation:
Firewalls enforce security policies by blocking unauthorized traffic.

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