Frame Relay

Which of the following WAN technologies utilizes the concept of virtual circuits and point-multipoint connections?

A.

ISDN

B.

MPLS

C.

PRI

D.

Broadband cable

E.

Frame relay.

E.

The WAN (Wide Area Network) technologies mentioned in the question are ISDN (Integrated Services Digital Network), MPLS (Multiprotocol Label Switching), PRI (Primary Rate Interface), Broadband cable, and Frame relay. The question is asking which of these technologies utilizes the concept of virtual circuits and point-multipoint connections.

Virtual circuits are a method of establishing a logical connection between two devices over a physical network. They are commonly used in WAN technologies to provide a reliable and secure connection between remote locations. Point-multipoint connections refer to a type of connection where one device is connected to multiple other devices.

Out of the given options, the WAN technology that utilizes the concept of virtual circuits and point-multipoint connections is Frame relay. Frame relay is a packet-switched technology that uses virtual circuits to establish connections between devices. These virtual circuits are established between the end devices and the network, which ensures a reliable and secure connection between remote locations.

Frame relay also supports point-multipoint connections, which means that one device can connect to multiple other devices through a single virtual circuit. This allows for efficient and cost-effective communication between multiple remote locations.

In contrast, ISDN uses circuit-switched technology, which establishes a dedicated physical connection between two devices. MPLS is a routing technology that uses labels to forward packets through a network. PRI is a type of ISDN connection that provides multiple channels for voice and data transmission. Broadband cable uses a cable modem to connect to the internet.

In summary, the WAN technology that utilizes the concept of virtual circuits and point-multipoint connections is Frame relay.