Abstract Syntax Notation One (ASN.1) is a notation that is used in describing<br>messages to be exchanged between communicating application<br>programs. It provides a high level description of messages that frees<br>protocol designers from having to focus on the bits and bytes layout<br>of messages. Initially used to describe email messages within the Open<br>Systems Interconnection protocols, ASN.1 has since been adopted for<br>use by a wide range of other applications, such as in network management,<br>secure email, cellular telephony, air tra±c control, and voice and<br>video over the Internet.
