CCNA Discovery 2, Chapter 5
5.5.3: Telecommunications service providers (TSP) typically maintain a network over large geographic areas. A TSP can provide the following WAN connections to individuals and organizations:
• A point-to-point (PPP) connection provides a specific dedicated path through the TSP network to connect two LANs over a large geographic area.
• A circuit-switched WAN connection allows the client to create and close connections over the TSP network; this connection operates like a phone call. Integrated services digital network (ISDN) is an example of a circuit-switched connection.
• A packet-switched WAN connection allows multiple clients to share a single connection. Unlike a circuit-switched network, in which the client temporarily ...
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