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Network Core Technologies

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Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.

A core network is a central network into which other networks feed. It must have the bandwidth to support the aggregate bandwidth of all the networks feeding into it. Traditionally, the core network has been the circuit-oriented telephone system. More recently, alternative optical networks bypass the traditional core and implement packet-oriented technologies. Figure N-6 (see book) provides a timeline of the development of core networks, starting with the early telephone system.

This topic continues in "The Encyclopedia of Networking and Telecommunications" with a discussion of the following:

  • Illustration showing timeline of network core developments
  • Core telephone network
  • Migration to digital systems
  • North American Digital Hierarchy
  • First fiber optic trunks
  • Emergence SONET and SDH optical networks
  • ATM and IP over SONET
  • The development of the Internet core
  • PoS (Packet over SONET)
  • DWDM wavelength circuits
  • MPLS (Multiprotocol Label Switching)
  • Future optical networks

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