The benefits of a dedicated connection are exclusive bandwidth, higher speeds, and established connections. The con is that you pay regardless of use. It is more expensive but cost-effective for long connects and short distances.
The pros of circuit switching are that it is widely available, you connect as needed, and it is inexpensive. The cons are that it is not as fast, it has poor path selection, and you have longer connect times because of performance.
The three main WAN encapsulation protocols are High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), and Frame Relay.
Seven different factors to consider when selecting a WAN technology: availability, bandwidth, cost, ease of management, application traffic, quality of service (QoS) and reliability, and access control.
