Computer networks allow computers and devices to connect and share resources. There are three main types of networks - local area networks (LANs) which connect devices in a small geographic area like a home or office, metropolitan area networks (MANs) which connect devices in a city or town, and wide area networks (WANs) which connect devices across large geographic areas like countries. Network topology refers to how computers are arranged and connected in a network, with common topologies including bus, star, and ring configurations.

1. TOPIC:
COMPUTER
NETWORKBY MR. E . I.
ISRAEL

2. COMPUTER NETWORK
•Computer network: Is a collection of computers and devices connected by the
communication channels that allow users to share the same data, information,
hardware and software with other users.
•It is simply the connection of two or more computers so that they can share
resources.
•People connect computers to a network for a variety of reasons, including the
ability to share hardware, software, data and information.

3. TYPES OF COMPUTER NETWORKS
•LAN (LOCAL AREA NETWORK)
•MAN (METROPOLITAN AREA NETWORK)
•WAN (WIDE AREA NETWORK)

4. TYPES OF COMPUTER NETWORKS
• LAN: Is a network that connects computers and
devices in a limited geographical area such as
a home, a school, a computer laboratory, an
office building, or a closely positioned group
of buildings.
• The linked computers are called workstations.
Each computer or device on the network is a
node. Often, the nodes are connected to the
LAN via cables.

5. TYPES OF COMPUTER NETWORKS
• MAN- Is a collection of local area
networks, it connect computers located in
the same geographical area, such as a city
or a town. A MAN is a high-speed
network that can carry voice, data and
images. Telephone companies, cable
television operators and other
organizations use a MAN.

6. TYPES OF COMPUTER NETWORKS
•WAN: is a network that
connects computers across a
nation. It may also include
the sites of a large
multinational organization.
The internet is an example of
WAN.

7. NETWORK TOPOLOGY
•Network topology is the arrangement of
computers in a network. Or it is the
different ways computers are connected in a
network.

8. TYPES OF NETWORK TOPOLOGY
•BUS NETWORK TOPOLOGY:
Computers are
connected serially.

9. TYPES OF NETWORK TOPOLOGY
•STAR NETWORK TOPOLOGY:
Computers are connected
to the central computer
one by one.

10. TYPES OF NETWORK TOPOLOGY
•RING NETWORK TOPOLOGY:
Several computers are
connected to form a
closed loop.

11. REVISION QUESTIONS
•a. Define a computer network.
•b. List three types of network.
•c. Define network topology.
•d. List 3 types of network topology