Unit 1

Question 1

What is a computer network?

Answer 1

A computer network is a collection of interconnected devices that communicate with each other to share resources and data.

Question 2

What are the main types of computer networks?

Answer 2

LAN, MAN, WAN, PAN, WLAN.

Question 4

What is the difference between LAN and WAN?

Answer 4

LAN covers a small area (like a home or office), while WAN spans large geographical areas (like the internet).

Question 5

What is a network topology?

Answer 5

The physical or logical arrangement of network devices.

Question 6

Name five common network topologies.

Answer 6

Bus
Star
Ring
Mesh
Hybrid

Question 7

What is a protocol in networking?

Answer 7

A set of rules that govern data transmission between devices.

Question 8

What are the main functions of a router?

Answer 8

Forwarding data packets
Network traffic management
Connecting different networks

Question 9

What is the OSI model?

Answer 9

A seven-layer framework for network communication.

Question 10

What does the Physical Layer do?

Answer 10

Transmits raw binary data over a physical medium.

Question 11

What is the role of the Data Link Layer?

Answer 11

Handles MAC addressing, error detection, and frame synchronization.

Question 12

What is the function of the Network Layer?

Answer 12

Routing and IP addressing.

Question 13

Which protocols work at the Transport Layer?

Answer 13

TCP
UDP

Question 14

What is the role of the Session Layer?

Answer 14

Manages and controls communication sessions.

Question 15

What does the Presentation Layer do?

Answer 15

Data translation, encryption, and compression.

Question 16

What are examples of Application Layer protocols?

Answer 16

HTTP
FTP
SMTP
DNS

Question 17

What are the four layers of the TCP/IP model?

Answer 17

Network Interface
Internet
Transport
Application

Question 18

What is the main difference between OSI and TCP/IP models?

Answer 18

OSI has 7 layers, while TCP/IP has 4 layers and is more practical.

Question 19

What protocol is used for reliable communication in TCP/IP?

Answer 19

TCP (Transmission Control Protocol).

Question 20

What is the main advantage of UDP over TCP?

Answer 20

Faster transmission without error checking.

Question 21

What is an IP address?

Answer 21

A unique numerical identifier for devices in a network.

Question 22

What is the purpose of the Internet Layer in TCP/IP?

Answer 22

Handles logical addressing and packet routing.

Question 23

What is a switch in networking?

Answer 23

A device that forwards data only to the intended recipient in a LAN.

Question 24

What is the difference between a hub and a switch?

Answer 24

A hub broadcasts data to all devices, while a switch directs data to specific devices.

Question 25

What does a modem do?

Answer 25

Converts digital signals to analog and vice versa for internet access.

Question 26

What is a gateway in networking?

Answer 26

A device that connects different networks and translates communication protocols.

Question 27

What are private IP addresses?

Answer 27

IP addresses used within a private network (e.g., 192.168.x.x, 10.x.x.x).

Question 28

What is subnetting?

Answer 28

Dividing a large network into smaller sub-networks for efficiency.

Question 29

What is the difference between IPv4 and IPv6?

Answer 29

IPv4 has 32-bit addresses, while IPv6 has 128-bit addresses for a larger address space.

Question 30

What is DNS (Domain Name System)?

Answer 30

A system that translates domain names into IP addresses.

Question 31

What is DHCP (Dynamic Host Configuration Protocol)?

Answer 31

A protocol that automatically assigns IP addresses to devices in a network.