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The OSI Application Layer

The Application layer, layer seven of the OSI model, provides the interface between applications and the Network Operating System (NOS). The Application layer provides network services and applications such as HTTP (Hypertext Transfer Protocol), FTP (File Transfer Protocol), TELNET, SNMP (Simple Netwrok Management Protocol) and SMTP (Simple Mail Transport Protocol).

OSI Application Layer

When you think of the Application layer, don't think in terms of applications, but rather protocols. For example there are several different FTP applications that use the FTP protocol at the Application layer.

More Networking Protocols and Standards:
• IPv6 Address Auto Configuration
• Free eBook: Introduction to 802.11 Wireless
• Network Operating Systems
• OSPF (Open Shortest Path First) Protocol
• An Introduction to the Types of VPNs
• Pv6 Myths
• Understanding IP Routing
• Virtual Local Area Networks (VLANs)
• The OSI Physical Layer
• IPv6 Address Types and Scopes

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