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Figure 10	Sidebar 1	jan94.tar

Figure 1: Simplified model of FTP

SERVER                             CLIENT
PROCESS                            PROCESS
+-----------+                      +-----------+
|+---------+|   FTP COMMANDS IN    |+---------+|
|| CONTROL |<----------------------|| CONTROL ||
||         ||   REPLIES BACK       ||         ||
||         |+---------------------->|         ||
|+---------+|                      |+---------+|
|+---------+|                      |+---------+|
|| DATA    ||   DATA ACROSS        || DATA    ||
|| TRANSFER|+---------------------->| TRANSFER||
|+---------+|                      |+---------+|
+-----------+                      +-----------+