This document provides an overview of computer networks, including definitions of common network types and topologies. It describes a computer network as a system that connects computers and devices. The three main network types are local area networks (LANs), which are smallest in size; metropolitan area networks (MANs), which can connect branches of an organization within a city; and wide area networks (WANs), which are the largest and can span states, countries, or continents. The document also outlines common network architectures like client-server and peer-to-peer, and defines key network devices including clients, servers, switches, and access points.

1. OVERVIEW
OF NETWORKS

2. Computer network
A computer network is a system
of interconnected computers
and peripheral devices.
For example, it may connect
computers, printers, scanners
and cameras.

3. TYPES OF NETWORKS
LAN :
Smallest network compared to
the other two networks.
MAN :
Companies that have several
branches within the Mumbai city
such as banks, use a MAN.
WAN :
The largest network of all
network types.
Internet is the largest WAN in the
world.
WAN generally covers large
distances such as states,
countries or continents.

4. Network architecture
CLIENT/SERVER NETWORK
A client/server network is a network in
which the shared files and applications are
stored in the server but network users
(clients) can still store files on their
individual PCs.
Peer-to-peer or P2P
It is a network with all the nodes acting as
both servers and clients.
A PC can access files located on another PC
and can also provide files to other PCs.
Peer-to-peer CLIENT/SERVER

5. NETWORK TOPOLOGY

6. Access point
Ethernet cable Fiber optical cable Wireless

7. Clients
Computers that request or order
information from a server
Usually desktop computers with their
own local storage and processing power
Parts of a Network 1/4

8. Access point :
is a networking hardware device that allows
a Wi-Fi device to connect to a wired
network.
Parts of a Network 2/4

9. Switch :
is a computer networking device that
connects devices together on a computer
network .
A core switch, also known as a tandem
switch and a backbone switch, is a high-
capacity switch positioned in the physical
core, or backbone, of a network. In a Local
Area Network (LAN), a core switch serves to
interconnect workgroup switches.
Parts of a Network 3/4

10. Parts of a Network 4/4
Servers
Computers that work behind the scenes to provide
(serve) the resources requested by the clients .
Two types
Non-dedicated – provides many different services
to its client computers such as file retrieval,
printing, and emailing
Dedicated – provides only one type of resource to
its clients, such as printing
File Server
mail Server
Active Directry Server

12. OSI Model

13. Thank you
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