model. The application layer deals with commands. The presentation layer handles formatting, usually ASCII. The session layer transmits. In the TCP/IP model, all of these functions are considered to be part of the application layer. Web Links Telnet http://searchnetworking.techtarget.com/ sDefinition/ 0,,sid7_gci213116,00.html

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Content Summary An understanding of the following key points should have been achieved:

• The functions of the TCP/IP transport layer
• Flow control
• The processes of establishing a connection between peer systems
• Windowing
• Acknowledgment
• Transport layer protocols
• TCP and UDP header formats
• TCP and UDP port numbers
• The processes and protocols at the TCP/IP application layer
• Domain Name Services
• File Transfer Protocols
• Simple Mail Transfer Protocol
• Simple Network Management Protocol
• Telnet