1) ATM uses fixed-sized packets called cells to transfer data at high speeds over both logical connections and physical interfaces in a streamlined manner. 2) ATM cells have a standard size and format including a header for routing and a payload for user data. Multiple logical connections can be multiplexed over a single physical interface. 3) ATM connections can be either virtual channel connections between two end users or virtual path connections that bundle multiple VCCs with the same endpoints to simplify networking and improve performance.

1. Data and Computer Communications Chapter 11 – Asynchronous Transfer Mode

3. Protocol Architecture

8. Call Establishment Using VPs

15. ATM Cells