David is working as a network engineer at an organization. One of his clients is planning to implement WAN technology to interconnect their regional offices to the corporate headquarters. Each of these regional offices should be connected to the corporate headquarters in a hub and spoke arrangement using packet-switched technology. Which of the following WAN technologies should David suggest?
  1. Frame Relay
  2. ISDN
  3. Ethernet
  4. Wireless
Explanation
Answer: A - To implement WAN technology to interconnect their regional offices to the corporate headquarters, David should suggest Frame Relay.

Key Takeaway: Frame relay puts data in a variable-size unit called a frame and leaves any necessary error correction up to the end-point, speeding up the overall data transmission. It is based on the older X.25 packet-switching technology that was designed for transmitting analog data such as voice conversations. It is often used to connect local area networks with major backbones, as well as on public-wide area networks and also in private network environments with leased lines over T-1 lines.
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