Application Layer 7
smtp(simple mail transfer protocol,),ftp,(file trasfer protocol),ip(nternet protocol).
Layer 7, Aplication
DNS is an application layer protocol. The application layer of the OSI model is the layer closest to the user and provides network services to the applications of the user. Examples of protocols that operate at the application layer are: DNS, FTP, TFTP, SNMP, TELNET, RLOGIN, SMTP, MIME, NFS, FINGER, BOOTP and SMB.
NTLM, LDAP, SMTP & RPC protocol
POP
Yes, SMTP (Simple Mail Transfer Protocol) relies on the underlying network infrastructure, which includes the physical data link layer, for transmission. While SMTP operates at the application layer of the OSI model, it requires the lower layers, including the physical layer, to facilitate the actual sending and receiving of data packets over a network. Without the physical data link layer, SMTP messages could not be transmitted between servers or clients.
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]
HTTP Belongs to the Application layer. Other transfer protocols like POP,FTP,SMTP etc also belongs to this layer
SMTP Protocol
Simple Mail Transfer Protocol (SMTP)
SMTP = Simple Mail Transfer Protocol
Yes