A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Application Layer

The Application Layer is an abstraction layer which functions as the top layer of the Open System Interconnectivity (OSI) model, covering communications protocols and process-to-process communications across IP networks. Protocols used in the Application Layer include FTP, SMTP and DNS.

The Application Layer is also an integral part of the IP Multimedia Subsystem (IMS).