This document discusses computer networks and network topologies. It defines a computer network as a set of connected computers that share resources. The document outlines different types of computer networks and topologies, including personal area networks, local area networks, metropolitan area networks, wide area networks, bus, ring, star, mesh, tree, and hybrid topologies. Each topology refers to a different logical layout for how connected devices are arranged on a network.

1. COMPUTER NETWORK AND NETWORK
TOPOLOGIES

2. Agenda
 Computer network.
 Types of Computer networks.
 NetworkTopology.
 Types of NetworkTopologies.

3. COMPUTER NETWORK
Computer network is a set of computers
connected together for the purpose of
sharing resources.

4. TYPES OF COMPUTER NETWORK
 Personal area network (PAN)
 Local area network (LAN)
 Metropolitan area network (MAN)
 Wide area network (WAN)

5. NETWORK TOPOLOGY
 Topology refers to the layout of connected
devices to the network.
 Here some logical layout of topology
 Bus
 Ring
 Star
 Mesh
 Tree
 Hybrid

6. BUS TOPOLOGY
 All devices are connected to single hub.
 Use a common background to connect all
devices.

7. RING TOPOLOGY
 Data travel in same direction.
 Devices are connected to each other in a
circular shape.

8. STAR TOPOLOGY
 Computers are connected by a single hub.
 There is no direct traffic between devices.

9. MESH TOPOLOGY
 Point to point connection.
 Traffic is carried only between two.

10. TREE TOPOLOGY
 Devices are connected to it by forming
hierarchy.
 At least three level of hierarchy.
 Join multiple star topologies together onto a
bus.

11. HYBRID TOPOLOGY
 Combination of two or more topology.
 Inherits merits and demerits of all topologies.