No announcement yet.

Port Forwarding + osi

  • Filter
  • Time
  • Show
Clear All
new posts

  • Port Forwarding + osi

    In which of the 7 layers the port forwarding works?

  • #2
    Re: Port Forwarding + osi

    I believe in the TCP/IP model it is the Transport Layer as ports are a feature of this layer.
    The thing is Cisco port overloading is network layer?

    For the OSI Model quoting Wiki - Transport Layer

    In the TCP/IP model, the transport layer is responsible for delivering data to the appropriate application process on the host computers. This involves statistical multiplexing of data from different application processes, i.e. forming data packets, and adding source and destination port numbers in the header of each transport layer data packet. Together with the source and destination IP address, the port numbers constitutes a network socket, i.e. an identificiation address of the process-to-process communication. In the OSI model, this function is supported by the session layer.
    Guess my best answer Session.
    Last edited by Maebe; 3rd September 2007, 16:59. Reason: I went looking for an explaination of why and couldn't find anything, tried looking for NAT and then posted incorrectly. :/
    I don't know anything about (you or your) computers.
    Research/test for yourself when listening to free advice.


    • #3
      Re: Port Forwarding + osi

      Layer 4 is where TCP and UDP function and those are the ports you forward.

      Maebe, you had it right, it's the transport layer.

      Network Consultant/Engineer
      Baltimore - Washington area and beyond