Network Architecture ? I Leo Tutorials

What is Network Architecture ?

Network Architecture 

A network architecture is the design specification of the physical layout of connected devices. This include the cable being used, the type of network architecture and passed to each device. network architecture in short, encompass the total design and layout  of the network

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  1. Ethernet : 

Ethernet is a very popular local area network architecture based on CSMA/CD access methods. The different veriety of ethernet networks are commonly reffered to as ethernet topology. Typically ethernet can used a bus, physical topolgy. Ethernet networks depend on the  specification operate at 10 or 100mbps using baseband transmission. Also,using the IEEE 802.3 version of protocol and each IEEE 802.3 specifications its own cable types.Ethernet networks transmit data in small unit is called frames.

     2. Token Passing : 


           Token passing architecture has two types, are as follows :

  • Token Ring (IEEE 802.5) : Token ring uses a token passing architecture that adheres to the IEEE 802.5 standard. The topology is physically a star but token ring uses a logical ring. To pass the token from station, each node must be linked to a concentration called a multistation access unit ( MSAU or MAU ).  Token ring network interface cards can run at 4 mbps or 16 mbps.Each node act as a repeater that receiver token and data frames from its nearest downstream to the next attached node. Each token makes atleast one trip around the entire ring and then returns to the originating node.
  • Token-Bus : Token bus is one of the most important topologies configurations for token passing network architectures. The token bus is more flexible in operation as the token passing . Order is defined by table in each station token bus combines feature of ethernet and token ring .It combine the physical configuration of ethernet and the collision free feature of token ring. Station are connected in the form of ring and token is passed among the stations. If stations wants to send data ,it must wait and get the token whether communication is done via the comman bus

    3.FDDI :

            FDDI is very similar to taken ring in that it release on a node to have the token before it can uses a network with a maximum distance between stations upto 2 kilometers. FDDI has two different configuration i.e. class A and class B. A uses two counter ring,devices are attached to both rings, if one of these ring develop a fault, then other ring can still be used transmit data.Class B uses a single ring to transmit data.

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