What is the client of an application server when used with web server and web client?












-1















When using ssh client and server in port forwarding, the programs involved communicate in a sequence:



application client <-> SSH client/server <-> SSH server/client <-> application server



When using web server and client with application server (note that here I am asking about concepts, so I guess that it is better to "separate" web server and application server, even if they are actually one program), I found an diagram from https://stackoverflow.com/a/24097629/156458.



Where is the application client?




  • Is it behind web client, like the case of using ssh client and server in port forwarding?


  • Or is there no other application client other than web server? Does a web server need to have the ability to work as a client to the application server?
    Does that imply that a web server doesn't necessarily have the ability to work with any application server?



Thanks.



enter image description here










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    -1















    When using ssh client and server in port forwarding, the programs involved communicate in a sequence:



    application client <-> SSH client/server <-> SSH server/client <-> application server



    When using web server and client with application server (note that here I am asking about concepts, so I guess that it is better to "separate" web server and application server, even if they are actually one program), I found an diagram from https://stackoverflow.com/a/24097629/156458.



    Where is the application client?




    • Is it behind web client, like the case of using ssh client and server in port forwarding?


    • Or is there no other application client other than web server? Does a web server need to have the ability to work as a client to the application server?
      Does that imply that a web server doesn't necessarily have the ability to work with any application server?



    Thanks.



    enter image description here










    share|improve this question



























      -1












      -1








      -1








      When using ssh client and server in port forwarding, the programs involved communicate in a sequence:



      application client <-> SSH client/server <-> SSH server/client <-> application server



      When using web server and client with application server (note that here I am asking about concepts, so I guess that it is better to "separate" web server and application server, even if they are actually one program), I found an diagram from https://stackoverflow.com/a/24097629/156458.



      Where is the application client?




      • Is it behind web client, like the case of using ssh client and server in port forwarding?


      • Or is there no other application client other than web server? Does a web server need to have the ability to work as a client to the application server?
        Does that imply that a web server doesn't necessarily have the ability to work with any application server?



      Thanks.



      enter image description here










      share|improve this question
















      When using ssh client and server in port forwarding, the programs involved communicate in a sequence:



      application client <-> SSH client/server <-> SSH server/client <-> application server



      When using web server and client with application server (note that here I am asking about concepts, so I guess that it is better to "separate" web server and application server, even if they are actually one program), I found an diagram from https://stackoverflow.com/a/24097629/156458.



      Where is the application client?




      • Is it behind web client, like the case of using ssh client and server in port forwarding?


      • Or is there no other application client other than web server? Does a web server need to have the ability to work as a client to the application server?
        Does that imply that a web server doesn't necessarily have the ability to work with any application server?



      Thanks.



      enter image description here







      ssh webserver






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 15 mins ago







      Tim

















      asked 1 hour ago









      TimTim

      27.4k78264474




      27.4k78264474






















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