What are the 2 types of ATM switches?

To make the switching more efficient, ATM uses two types of switches namely, VP switch and VP-VC switch. A VP switch route cells only on the basis of VPI, here VPIs change but VCIs remain same during switching. On the other hand, VP-VC switch uses the complete identifier, i.e. both VPI and VCI to route the cell.

Which type of switching is used in ATM?

ATM switch uses two types of switches viz. VP switch and VP-VC sitch. Typically, switches connected to users are VPI/VCI switches while all intermediate switches are only VPI switches All VPIs and VCIs field have local significance across particular link.

What are the important features of an ATM switch?

The following features are found in an ATM network:

• Interface types. The interface between ATM switches is called a Network to Network Interface (NNI).
• Switch types. ATM switches come in a variety of types and sizes.
• Attached devices.
• Link speeds.
• Attach media.

What is ATM switch and how is transmission performed in ATM networks?

ATM switch −It transmits cells through the ATM networks. It accepts the incoming cells from ATM endpoints (UNI) or another switch (NNI), updates cell header and retransmits cell towards destination.

What is ATM architecture?

The asynchronous transfer mode (ATM) protocol architecture is designed to support the transfer of data with a range of guarantees for quality of service. The user data is divided into small, fixed-length packets, called cells, and transported over virtual connections.

How cell switching is done in ATM?

Cell switching uses a connection-oriented packet-switched network. When a connection is established it is known as signaling. It is called cell switching because this methodology uses a fixed length of packets of 53 bytes out of which 5 bytes are reserved for header.

Where is ATM protocol used?

Asynchronous transfer mode (ATM) is a switching technique used by telecommunication networks that uses asynchronous time-division multiplexing to encode data into small, fixed-sized cells. This is different from Ethernet or internet, which use variable packet sizes for data or frames.

How does an ATM virtual connection identified?

The connections are identified using a virtual path identifier (VPI) and a virtual channel identifier (VCI). The VPI field occupies one byte in the ATM cell five-byte header; whereas, the VCI field occupies two bytes in the ATM cell five-byte header. Basically, a VPI:VCI pair identifies the source of the ATM cell.

How is an ATM virtual connection identified?

What is ATM virtual circuit?

ATM is a “virtual circuit” based: the path is reserved before transmission. While Internet Protocol (IP) is connectionless and end-to-end resource reservations are not possible. ATM Cells: Fixed or small size and Tradeoff is between voice or data. While IP packets are of variable size.