Application Layer
Bits
Datagram
Frame
Segment
Protocol Stack
Message
Transport Layer
Bits
Datagram
Frame
Segment
Protocol Stack
Message
Network Layer
Bits
Datagram
Frame
Segment
Protocol Stack
Message
Link layer
Bits
Datagram
Frame
Segment
Protocol Stack
Message
Physical layer
Bits
Datagram
Frame
Segment
Protocol Stack
Message
All layers together are called a
Bits
Datagram
Frame
Segment
Protocol Stack
Message
IMAP
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
POP3
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
HTTP
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
DNS
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
TCP
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
SSL
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
UDP
Transfer web messages
Segments without reliable data transfer
Translate domain name to IP adress
Reliable unencrypted byte-oriented data stream
Reliable encrypted byte-oriented data stream
Receive email
Receive email
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