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Which type of connection is commonly used in environments that require only minimal WAN usage, which supports HDLC and PPP encapsulations?
Frame-Switching
Packet-Switching
Circuit-Switching
Cell-Switching
Circuit Switching is one type of WAN connection that uses dedicated channels established for a duration of the transmission. Circuit-switched networks are sometimes called connection-oriented networks. They are ideal for communications that require data to be transmitted in real-time. They support either HDLC or PPP encapsulations. Packet-switching is a connectionless protocol that divides messages into packets and sends each packet individually. The Internet is based on a packet-switching protocol, TCP/IP. Although, Packet-Switching is a connectionless protocol, they can be made connection-oriented by using a higher-level protocol; TCP. Cell-Switching is similar to Packet-Switching except that it uses fixed-length cells (53 bytes), which typically provides high bandwidth/speed data transfers (up to 155Mbps). Cell switching can handle multiple data types, i.e. voice, video, and data. Frame-switching does not exist in this context; however, frame switching refers to speeding up network traffic using the full bandwidth.
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