Which of the following is a telecommunication service designed for cost-efficient data transmission for intermittent traffic between local area networks (LANs) and between end-points in a wide area…

Question

Options

• APPP
• BFrame relay
• CISDN
• DX.25

• A
  3% (1)
• B
  93% (28)
• C
  3% (1)

Explanation

Frame Relay is a packet-switched WAN protocol specifically engineered for cost-efficient transmission of intermittent (bursty) data traffic, making it ideal for connecting LANs across a WAN - it uses virtual circuits and charges based on actual usage rather than dedicated bandwidth, keeping costs low for traffic that comes and goes.

PPP (A) is a point-to-point data link protocol for direct node-to-node connections (e.g., dial-up), not designed for LAN interconnection or cost-efficient bursty WAN traffic. ISDN (C) is a circuit-switched network that reserves dedicated bandwidth for the duration of a call, making it inefficient and expensive for intermittent data. X.25 (D) is a tempting distractor - it is a packet-switched WAN protocol like Frame Relay, but it's the older predecessor with heavy per-node error checking and much higher overhead, not optimized for cost-efficiency or speed.

Memory tip: Think "Frame Relay = Flexible and Frugal" - it only uses (and charges for) the network when you actually send frames, perfect for traffic that arrives in intermittent bursts between LANs.

No community discussion yet for this question.