Question

An ATM cell is ....... bytes long.

• A. $53$
• B. $5$
• C. $48$
• D. $60$

Answer 1

Answer: (A)

$53$

An ATM cell is 53 bytes long.

ATM cell packet size or cell size is 53 bytes. In this Header is 5 bytes long and 48 bytes are reserved to carry the data. If the input is in the form of longs packets they are converted in small 53 bytes long ATM cells.

ATM:-

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.