Computer Network and Internet

Computer Network and Internet

Unit 1: Introduction to Computer Network

Definition of a Computer Network, concept of Network

Components of a computer network, use of computer networks.

Simplex, Half duplex & Full duplex.

Components of computer networks-files server, workstation.

Network devices-hub, repeater, bridge, router, gateway.

Classification of computer network-

Geographical spread (LAN,WAN, MAN).

Unit 2: Data Transmission & Topologies

Data transmission-   Serial and parallel transmission.

Data communication-   Analog and digital transmission.

Transmission Medias-

1. I) Guided media –

Twisted pair

Coaxial cable

Optical fibers.

1. II) Unguided media-

Radio waves

Microwaves

Infrared.

Topologies- bus, star, ring, mesh, tree.

Unit 3:  OSI Model and TCP/IP

Introduction-  Concept of Error detection & control code.

Flow control- Stop and Wait protocol,

Sliding window protocol.

Routing & Routing algorithms-shortest path, flooding.

Switching techniques- circuit, packet & message switching, Connection oriented and connectionless services. OSI

Model-Introduction, Working and Functions of – Physical layer,

Data Link Layer, Network Layer, Transport Layer, Session

Layer, Presentation Layer, Application Layer.

TCP/IP Model-

Introduction, Working and Functions of – Process/Application

layer, Host to Host/Transport layer, Internet layer, Network access/Link layer.

Unit 4: Internet and Web

Introduction to internet, Evolution of Internet

Difference in Internet, Intranet & Extranet.

Domain Name System (DNS).

Web browsers & its features, Search engines, Netiquette

Introduction to Web 3.0, Advantages of Web 3.0.

Internet security threats and security solutions.