ITPEC IP April 2023 Question 34
Among the cases of communication between PCs, servers, communication devices, printers, and other devices, which of the following needs to use a WAN?
Explanation
A PC in the Kyoto sales office uploading to a server in the Tokyo head office — the only case that links sites in different cities.
A LAN covers one building or site, with cables and equipment the organisation owns. Connecting distant sites needs a WAN, which uses lines provided by a telecommunications carrier, such as a leased line or an Internet VPN. Kyoto and Tokyo are hundreds of kilometres apart, so the Kyoto LAN reaches the Tokyo server through a WAN.
Answer (d)
Why not others:
- •(a) — PCs and a file server on one LAN in the Osaka branch office; the LAN alone is enough
- •(b) — Bluetooth between a PC and a printer in one house is short-range wireless, a few metres
- •(c) — a PC and a web server on the same hub in one server room are on the same LAN
Key rule: Within one site, a LAN; between geographically separate sites, a WAN over a carrier's lines.
Networks · AI-written, may contain errors
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