http
telnet
No. It is a function of an application (SMTP is an e-mail sending protocol within these applications).
An LDAP (Lightweight Directory Access Protocol) port is simply an application for distributing, accessing, and maintaining information through an IP (Internet Protocol).
Wireless Application Protocol
both are same...
The function of the application layer is to interface between an external program application and the network stack. As such it has to build the first part of the packet that describes the protocol being used in the network. There are a series of API (application Program Interfaces) which allows a software developer to interface with the OSI layers without knowing anything about how to network.
1.application: e-mail application-layer protocol: SMTP [RFC 2821] 2.application: WEB application-layer protocol: HTTP [RFC 2616] 3.application: streaming multimedia application-layer protocol: HTTP (eg Youtobe), RTP [RFC 1889] 4.application:file transfer application-layer protocol: FTP [RFC 959] 5.application: remote terminal access application-layer protocol: Tenet [RFC 854]
WAP (Wireless Application Protocol)
NTP (Network Time Protocol)
*IPSEC
FTP (File Transfer Protocol) is an application layer, or Layer 7, protocol.
WAP is Wireless Application Protocol
tftp