Let’s talk about fundamentals of network TCP/IP and OSI models. Let’s keep in mind that each layer has it’s own protocol which will be listed below. The first difference at glance is that TCP model consists of 5 layers versus 7 in OSI which are:
Application , Transport, Network , Data-link, Physical vs Application, Presentation, Session, Transport, Network , Data-link, Physical
Application layer – provides interface communication between software and applications that need to communicate.
Presentation – defines and negotiates data formats. Also includes encryption.
Session layer – defines how to start, control and end the sessions, also includes messages management.
Protocols: Telnet, FTP, DNS, TFTP , etc.
Transport – provides data delivery error recovery and flow control.
Protocols: TCP, UDP.
Network – defines addressing, forwarding and path determination.
Protocols: IP, ARP, RARP.
Data-link layer – defines the rules when the device can send data to the particular medium.
Physical – sets the standards of physical characteristics of data transmission.
Protocols: Ethernet, TokenRing, etc.
Benefits of OSI:
Benefits of TCP/IP:
Difference betwen TCP/IP and OSI:
I can point the most simple and fundamental differences between them:
If you are interested in networking architecture and it’s concepts, I would recommend the CISCO certification, there are a lot of thing to learn and explore, the whole science. Giving the brief information on TCP/IP and OSI models, it should give you a little understanding which model to use and when!
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