AAL5 is a streamlined protocol used to segment and reassemble variable-length computer data packets for transmission across an ATM network. It strips away much of the overhead found in earlier AAL versions, using an 8-byte trailer to ensure data integrity while maximizing payload space. It is the most common adaptation layer for internet traffic, often used to encapsulate IP or Ethernet frames over DSL connections.
The DSL modem encapsulates the customer's IP traffic using AAL5 before sending it upstream to the multiplexer.
Also heard as
- SEAL
Related terms
AAL
A protocol layer that formats higher-level data into standard cells for asynchronous transfer mode networks.
AAL2
An ATM adaptation layer designed for variable-bitrate, timing-dependent traffic like compressed voice.
ATM
A telecommunications standard that switches traffic in fixed-size 53-byte cells.
DSL
A digital subscriber line is a technology that transmits high-bandwidth data over traditional copper telephone wires.
ADSL
Asymmetric Digital Subscriber Line provides broadband internet access over traditional copper telephone lines.