Attribute Type indicates the message type and is used to identify various kinds of signaling messages and to tell data messages from signaling messages.
Attributes is a collection of binary flags that describe some properties of the message.
An Attribute flag can be used to mark a data message as special, so that it can be identified and processed in a special way. Some attributes of messages are implicit and their automatic declarations are invisible. The union of all such customers is represented by a single compound object known as the Client . Consequently, a traffic generator in our model supplies the network directly with cells to be transmitted to their destinations. No multicast traffic is implemented at present.