VPI FULL FORM

Full Form of VPI : Virtual Path Identifier

What is the full form of VPI ?

No:1. Virtual Path Identifier abbreviated as VPI is a data communication identifier that uniquely identifies a network path for an asynchronous transfer mode (ATM) cell packet to reach its destination node.
No:2. It is a method of sending data in small data packs.

How It Is Formed?

No:1. VPIs are 8 to 16-bit numeric headers inside each ATM cell packets.
No:2. Here transmission path is the optical fibre used for transmitting high-speed data.
No:3. The idea behind dividing the virtual connection identifier into two parts i.e. virtual path identifier(VPI) and virtual circuit identifier(VCI) is to allow hierarchical routing.
No:4. Most of the switches in a typical ATM network are routed using VPIs.

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Functioning

No:1. The connection between two endpoints of a fibre or transmission path is accomplished through a virtual path and virtual circuit.
No:2. The physical fibre may consist of many virtual paths.
No:3. A virtual path provides a connection between two switches.
No:4. Cell networks are based on virtual circuits.
No:5. Cells belonging to a single message follow the same virtual circuits. There are several virtual paths that utilize media bandwidth.
No:6. If media bandwidth is B and there are N VPs then each VP has a bandwidth B/N.
No:7. Each virtual path is divided into several virtual channels. VPI determines the VP for each particular user and their usage.

What is Virtual Path?

No:1. In the ATM header, the bandwidth of the communication route is reasonably classified into separate virtual path using their VPIs.
No:2. Each VPI is allowed a fixed bandwidth.

Characteristics

No:1. With the usage of optical fibres and virtual path identifiers, the quality of services in data connection and bandwidth has improved significantly.
No:2. These are specified by parameters and usage which makes the process standardized.
No:3. To allow uninterrupted connections switching and semi-permanent virtual connections are present.

Applications

No:1. It is use to connect end-users.
No:2. It manages data and signals between end to end-user.
No:3. It also finds usage between end-user and the network entity.

Advantages

No:1. It reduces the complexity of network design providing a simpler network.
No:2. The consistency and network performance is improve.
No:3. It diminishes setup timings and processing of small connections.
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