... (Route Processor). M - 10 1 CCNA 1- 4 v 3.0 – Glossary Copyright 20 03, Cisco Systems, Inc. MMA master management agent. SNMP agent that runs on the NP of a LightStream 20 20 ATM switch. MMA ... signal element represents exactly 1 bit. Bay Area Regional Research Network See BARRNet. A - 1 CCNA 1- 4 v 3.0 – Glossary Copyright 20 03, Cisco Systems, Inc. CCNA Glossary A Term Definition ... are AAL1, AAL2, AAL3/4, and AAL5. See AAL1, AAL2, AAL3/4, AAL5, CS, and SAR. See also ATM and ATM layer. AAL1 ATM adaptation layer 1. One of four AALs recommended by the ITU-T. AAL1 is used...