Specifications

Software Crestron e-Control
®
Layer 3: Transport - Corresponding to the OSI Transport layer, this is the part of the
protocol stack where the Transport Control Protocol (TCP) and User Datagram
Protocol (UDP) implemented by e-Control can be found. TCP works by asking another
device on the network if it is willing to accept information from the local device.
Layer 4: Application - Layer 4 combines the Session, Presentation and Application
layers of the OSI model. Protocols for specific functions such as email (Simple Mail
Transfer Protocol, SMTP) and file transfer (File Transfer Protocol, FTP) reside at
this level.
OSI illustration copyrighted by and reused with permission of whatis.com
(http://www.whatis.com
) and TechTarget, Inc.
56 • Crestron e-Control® Reference Guide – DOC. 6052