The best replacement for sockets is cores.

The best alternatives to sockets are rated as following:
★★★★★  cores
★★★★★  ports
★★★★  rmi
★★★★  pipes
★★  wcf
★★  rpc
★★  cores vmware
★★  regular sockets
★★  websockets
★★  named pipes
★  remoting
★  threads
★  shared memory
★  instant start sockets
★  12 point sockets
★  slots
  more cores
  corba
  virtual cores
  message queue
  mpi
  standard sockets
  12 point
  6 point sockets

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Google Trends

Scale is based on the average worldwide traffic of sockets in all years. Click on graph for more.
sockets
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