The OSI Application Layer
By Stephen Bucaro
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).
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 Dynamic Address Allocation • IPv6 Address Auto Configuration • The OSI Application Layer • X.25 and Frame Relay Overview • IPv6 Prefix Length Notation • Active Directory : How Objects Are Stored and Identified • Link Aggregation • Video Streaming Protocols • RADIUS Protocol • Video - The Upper Layers 5 Through 7 of the OSI Networking Model
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