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A gateway is

a forwarding element, enabling various local networks to be connected.[1]
[an] [i]nterface providing a compatibility between networks by converting transmission speeds, protocols, codes, or security measures.[2]
[a] device that passes traffic between networks. Typically, a gateway physically sits at the perimeter of an internal network to the Internet.[3]
[t]he function, realized by any combination of equipment and "software", to carry out the conversion of conventions for representing, processing or communicating information used on one system into the corresponding, but different conventions used in another system.[4]


A gateway refers to the

computers that transform the circuit-switched voice signal into Internet Protocol packets, and vice versa, and perform associated signaling, control, and address translation functions.[5]


  1. Framework for Cyber-Physical Systems, at 12.
  2. CNSSI 4009.
  3. Investigations Involving the Internet and Computer Networks, at 87.
  4. U.S. Export Administration Regulations, Part 772 (15 C.F.R. §772.1).
  5. Vonage Holdings Corp. v. Minnesota Public Utilities Comm'n, 290 F.Supp.2d 993, 1000 (D. Minn. 2003) (full-text).

See also[]