Question 1

How many layers are in the OSI model?

Accepted Answer

7. OSI has 7 layers (top to bottom): Application, Presentation, Session, Transport, Network, Data Link, Physical. TCP/IP has 4 layers.

Question 2

Which protocol provides reliable, ordered, error-checked data delivery?

Accepted Answer

TCP. TCP (Transmission Control Protocol) provides reliable, connection-oriented communication with handshaking, acknowledgments, and retransmission. UDP is faster but unreliable.

Question 3

What is the purpose of DNS?

Accepted Answer

Translates domain names to IP addresses. DNS (Domain Name System) resolves human-readable names (e.g., gradebuzz.com) to IP addresses. It operates over UDP port 53 (and TCP for large responses).

Question 4

What is a MAC address?

Accepted Answer

A unique hardware identifier assigned to a network interface. A MAC (Media Access Control) address is a 48-bit (6-byte) identifier burned into network interface cards. Used for communication within a local network (Layer 2).

Question 5

What does DHCP do?

Accepted Answer

Automatically assigns IP addresses to devices on a network. DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses, subnet masks, gateways, and DNS servers to network devices.

Computer Networks MCQ Quiz

What This Quiz Covers