WAN (Wide Area Network) protocols are communication standards that enable data transmission across geographically dispersed networks. They define how data is packaged, addressed, routed, and secured over long distances. Common examples include PPP (Point-to-Point Protocol) for dial-up connections, Frame Relay for leased lines, MPLS (Multiprotocol Label Switching) for efficient routing, and HDLC (High-Level Data Link Control) for serial communication. These protocols are essential for connecting branch offices, data centers, and cloud services, enabling organizations to build wide area networks.
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