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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:
• Neighbor Discovery Protocol (NDP)
• Wireless Network Standards - 80211a, 80211b, 80211g, 80211n, 80216
• OSI Network Model
• IP version 6 (IPv6) Advantages and Implementation
• Free eBook: IPv6 Addressing
• X.25 and Frame Relay Overview
• Video Streaming Protocols
• Comparison of the Layers of the OSI and TCP/IP Models
• IEEE 802.11 Wireless Modulation Methods
• Video - Transport Layer (Layer 4) of OSI Networking Model

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