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:
• Network Gateways
• IP version 6 (IPv6) Advantages and Implementation
• X.25 and Frame Relay Overview
• What is PPP, PPPoA and PPPoE?
• Network Switches
• The OSI Network Layer
• What Is Fabric Networking?
• Video Streaming Protocols
• Networking Protocols, Ports, Standards, and Organizations What Does it All Mean?
• Shortest Path Bridging (SPB) Protocol

RSS Feed

 Follow @Stephen Bucaro

 Basics and Certification
 Technologies and Media
 Protocols and Standards
 Troubleshooting and Support
 Network Security
 Cisco Certification