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picture1_Python Network Programming Pdf 194637 | 466 Socket Programming


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File: Python Network Programming Pdf 194637 | 466 Socket Programming
socket programming 192 168 23 100 143 web server os mail server computer networking a top down approach 6th edition jim kurose keith ross some materials copyright 1996 2012 addison ...

icon picture PDF Filetype PDF | Posted on 06 Feb 2023 | 2 years ago
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                 Socket programming 
            192.168.23.100:143               web 
                                            server 
                                 OS          mail 
                                            server 
   Computer Networking: A Top Down Approach  
   6th edition  
   Jim Kurose, Keith Ross            Some materials copyright 1996-2012 
   Addison-Wesley               J.F Kurose and K.W. Ross, All Rights Reserved 
                              Overview                       application 
                                                                   
     • Chapter 2: Application Layer                          transport 
                                                                   
         –Many familiar services operate here                 network 
             • Web, email, Skype, P2P file sharing                 
                                                                link 
         –Socket programming                                       
     • Socket programming                                     physical 
         –In Python 
         –UDP 
         –TCP 
      
                                                                          2 
        Communication - division of labor 
    • Network 
        –Gets data to the destination host 
        –Uses destination IP address 
    • Operating system 
        –Forwards data to a given "silo" based on port # 
        –E.g. All port 80 request go the web server 
    • Application 
        –Actually reads and writes to socket 
        –Implement the application specific magic 
                                                               3 
                          Port numbers 
     • Popular applications have known ports 
        –Server uses a well-known port, 0 - 1023 
        –Client uses a free temporary port, 1024 - 65535 
            • Assigned by the operating system 
                 Port       Service 
                 21         File transfer protocol (FTP) 
                 22         Secure shell (SSH) 
                 23         Telenet 
                 25         Simple mail transfer protocol (SMTP) 
                 53         Domain name system (DNS) 
                 80         Hypertext transfer protocol (HTTP) 
                 110        Post office protocol (POP) 
                 143        Internet message access protocol (IMAP) 
                 443        HTTP secure (HTTPS) 
                                                                       4 
         
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...Socket programming web server os mail computer networking a top down approach th edition jim kurose keith ross some materials copyright addison wesley j f and k w all rights reserved overview application chapter layer transport many familiar services operate here network email skype pp file sharing link physical in python udp tcp communication division of labor gets data to the destination host uses ip address operating system forwards given silo based on port e g request go actually reads writes implement specific magic numbers popular applications have known ports well client free temporary assigned by service transfer protocol ftp secure shell ssh telenet simple smtp domain name dns hypertext http post office pop internet message access imap https...

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