Specifications

Ethernet Loop Testing Page E-2
1. The ability to communicate with a specific remote station.
2. The ability to communicate with some remote station.
3. The ability of a specific third party station to communicate
with a specific remote station.
4. With the help of a third party station, the ability to hear or
be heard by a specific station.
E.I.3 Functional Model
The Ethernet Loop Testing Protocol is composed of two modules, the
Loop Requester and the Loop Server. Although these two modules are
Client Layer entities, some services not included by the Data Link
Layer are also required.
A minimum Client Layer communication
service, which lies between the Data Link Layer and the two modules
above, is needed to provide simple success/fail transmit and receive
services, as well as protocol type demultiplexing. Thus, the abstract
Ethernet interface assumed in this description is of a slightly higher
level than the Data Link to Client Layer interface.
1 User Modules 1
+------------+
1 Ethernet I
1 Data Link I
Data
Link
Layer
The active end of the loop testing communication link is the Loop
Requester module. It contains features which establish and control
the loop communications.