Draw the Internet architecture [TCP/IP architecture] and explain the functionalities of each layer in detail.

Draw the Internet architecture [TCP/IP architecture] and explain the functionalities of each layer  in detail.
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Answer :

∙ NET1, NET2, and so on. combination of hardware (e.g., a network adaptor) and software(e.g., a  network device driver).  
Ethernet or Fiber Distributed Data Interface (FDDI) protocols.  
∙ Internet Protocol (IP). Interconnection of multiple networking technologies into a single, logical  internetwork.  
∙ Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP): end-to-end protocols,  
 TCP - reliable byte-stream channel UDP - unreliable datagram delivery channel.  
∙ Application protocols, FTP, TFTP (Trivial File Transport Protocol), Telnet (remote login), and  SMTP (Simple Mail Transfer Protocol, or electronic mail), enable interoperation of popular  applications.
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