ravi namboori's network topologies
DESCRIPTION
what is network.. origin of network.. and small information regarding networkTRANSCRIPT
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Network TopologiesPresented by Ravi namboori
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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
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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
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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
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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
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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.
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Tree Topology
A tree topology connects multiple star networks to other star networks.
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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.
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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
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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.
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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