Process - Service


A service is a process that runs continuously in the background and are started by the operating system

It is used remotely through some remote interface, either synchronous or asynchronous (eg web service, messaging system, RPC, or socket.)


A service is identified:

  • on the network by:
    • its endpoint (host + port: network address)
    • and socket (network address and protocol - TCP/UDP)
  • on the application level by its scheme (application protocol)

For instance, if you known that there is a service on the port 80, you would expect it to be:

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