Terms and Acronyms

• Destination Class Usage (DCU)—A method of grouping certain types of traffic and monitoring these groups through CLI show commands, accounting profiles, or SNMP. DCU uses a destination address lookup when determining group membership. For more information about DCU, see the JUNOS Internet Software Policy Framework Configuration Guide.
• Source Class Usage (SCU)—A method of grouping certain types of traffic and monitoring these groups through CLI show commands, accounting profiles, or SNMP. SCU uses a source address lookup when determining group membership. For more information about SCU, see the JUNOS Internet Software Policy Framework Configuration Guide.
• Source Address (SA)—The IP address of a device sending a packet. This address is included in the IP header and is analyzed by the router for a variety of services, including source-based filtering, policing, class of service (CoS), and SCU.
• Destination Address (DA)—The IP address of a device intended as the receiver for a packet. This address is included in the IP header and is the main address analyzed by the router during routing table lookups and DCU.