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Network TopologyDefinition and Types
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Definition of Network Topology
Network Topology is the layout pattern of interconnections of the various elements of a computer or biological network. And it is of two(2) types; Physical and Logical.
Physical Topology: refers to the physical design of a network including the devices, locations and cable installation
Logical Topology: refers to how data is actually transferred in a network as opposed to its physical design.
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Bus topology
A bus network topology is a network architecture in which sets of clients are connected via a shared communications line, called a bus.
Node1
Node3
Node4
Node5
Node2
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Star Topology
Star network topology is the most common computer network topology.
A star network consist of one central switch, hub or computer, which acts as a conduit to transmit messages
HubHub
Node1
Node2
Node5 Node
4
Node5
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Mesh Topology
Mesh topology is a type of networking where each node must not only capture and disseminate its own data, but also serve as a relay for other nodes, i.e it must collaborate to propagate the data in the network
Node4
Node5
Node5
Node1
Node2
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Ring Topology
Ring topology is a network topology in which each node connects to exactly two or other nodes, forming a single continuous pathway for signals through each node-a ring
Node1
Node2
Node5
Node4
Node5
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Network DevicesRouter
Gateway
Switch
Bridge
Repeater
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RouterForwards data packets between computer networks.
Creats overlay internetwork.
Traffic directing
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GatewayA gateway is a combination of hardware and software
Translate between different protocol suites
Operates on all 7 layers of the OSI model
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SwitchReceives and transmit messages to other devices on the network
Operate at one or more layers of the OSI model
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BridgeEthernet networks use transparent bridges
Token Ring networks use source-routing bridges Translation Bridges
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RepeaterAn analog device that amplifies an input signal regardless of its nature
Operates on the physical layer, the 1st layer of the OSI model