POP3
Hop to hop delivery is between two nodes connected to the same network by a link and is done by data link layer while application to application (process to process) delivery is done in the transport layer by making sure that the whole message arrives intact and in order, by realising the relationship between the packets in that layer.
TELNET operates at Application Layer in TCP/IP Model. It's an Application to establish a connection to TCP Port Number 23, where a Telnet server application (telnetd) is listening.
That would be layer 7 - the application layer.
Application Layer
application layer
POP3
transport layer of osi model is responsible for end to end delivery of packets over a network
ICMP
SMB (Server Message Block)
Application Layer
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.
Hop to hop delivery is between two nodes connected to the same network by a link and is done by data link layer while application to application (process to process) delivery is done in the transport layer by making sure that the whole message arrives intact and in order, by realising the relationship between the packets in that layer.
The SMB (Server Message Block)
TELNET operates at Application Layer in TCP/IP Model. It's an Application to establish a connection to TCP Port Number 23, where a Telnet server application (telnetd) is listening.
The Application layer The Presentation layer The Session layer
That would be layer 7 - the application layer.