Network TopologiesPresented by Ravi namboori

Network Topology

Network Topology is an arrangement of various elements of a Computer Network.

Topology means arrangement of devices. We are having two types of network

topologies. They are:

• Physical topologies

• Logical topologies

Physical Topologies

Physical topologies means physical arrangement of devices i.e.,

connecting two more systems by using cables etc. Physical topologies are

5 types they are:

Bus Topology

Ring Topology

Star Topology

Tree Topology

Mesh Topology

Bus TopologyThe bus topology, each node (computer, server, peripheral etc.) attaches directly to a

common cable. This topology most often serves as the backbone for a network. In

some instances, such as in classrooms or labs, a bus will connect small workgroups

Ring Topology A ring topology features a logically closed loop. Data packets travel in a single direction around the ring.one network device to the next. Each network device acts as a repeater, meaning it regenerates the signal

Star Topology

In a star topology each node has a dedicated set of wires connecting it to a central

network hub. Since all traffic passes through the hub, the hub becomes a central

point for isolating network problems and gathering network statistics.

Tree Topology

A tree topology connects multiple star networks to other star networks.

Mesh Topology A network setup where each computer and network device is interconnected with

one another, allowing for most transmissions to be distributed, even if one of the

connections go down. This topology is not commonly used for most computer

networks as it is difficult and expensive to have redundant connection to every

computer. However, this topology is commonly used for wireless networks.

Logical Topologies

Logical topologies means logical arrangement of devices. In logical topologies we are having two models, they are:

Work group model (or) peer to peer model (or) stand-alone model.

Domain model or client –server model

Work group model  It is also called as peer to peer model. Peer means individual computer. If

you install client operating system (or) server operating system defiantly

that computer belongs to work group model. Work group model computers

does not depend on any other computers. In work group model computers

we are creating local user accounts. For local user accounts we are using

“SAM” Database. SAM-security accounts manager.

Domain model

 It is also called as client –server model. In this we are using active directory domain

services(ADDS). ADDS is a database stores information on user identity, computers,

groups, services and resources. ADDS domain controller also host the service that

authentication user and computer accounts when they log on to domain purpose of

ADDS