Management protocol (SNMP)
The protocol between manager and element
Defines only five types of messages
1. fetch the value of one or more variables: the get-request operator
2. fetch the next variable after one or more specified variables: the get-next operator
3. set the values of one or more variables: the set-request operator
4. return the value of one or more variables: the get-response operator
5. notify the manager when something happens on the agent: the trap operator