The Network Layer
Network Layer Protocols
Common protocols used by the Network Layer include:
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X.25 is a connection-oriented, packet-switching protocol defined by the International Telecommunication Union-Telecommunications Standardization Sector (ITU-T). X.25 was widely used for public data networks, especially in Europe; however, it has been largely replaced by faster protocols based on the same basic approach.
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Internet Protocol (IP), derived from X.25, is the primary Layer 3 protocol used across the Internet.
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Internetwork Packet Exchange (IPX) is Novell NetWare's Network Layer protocol. It was derived from the Xerox Network System (XNS) protocol suite, which was used in early LANs.
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Why would it take longer for a router to forward data through a network than a switch? Click on the audio link for the answer.
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