問84
頻出度★★★
ネットワークの構成のうち, WAN に該当するものはどれか。
平成29年度 春期 ITパスポート試験 問84
テクノロジ系ネットワーク › ネットワーク方式
This question's explanation and your answers so far.
解説
問 84
Incorrectア
This is a configuration that uses lines managed by the company itself to connect buildings within “the same premises”. Its scope is confined to the same premises and it does not use a carrier's lines, so it is classified as a LAN (local area network), not a WAN.
Incorrectイ
This is a configuration that connects floors within the company's own building, with its scope contained inside a single building. This is a typical LAN and does not correspond to a WAN, which connects a wide area.
- ウ
正解 A WAN (Wide Area Network) is a network that uses a telecommunications carrier's communication lines to connect sites that are geographically far apart. Choice ウ describes a configuration that “uses a telecommunications carrier's communication lines to connect the head office with a branch office in another prefecture”, connecting remote sites across prefectures over the carrier's lines, so it is exactly a WAN. These two points — “another prefecture (long distance)” and “using the carrier's lines” — are the typical characteristics of a WAN.
Incorrectエ
This is a configuration that connects the PCs within a single floor, the smallest-scope LAN. It does not connect remote sites, so it is not a WAN.
ここがポイント
- A WAN (Wide Area Network) uses a carrier's lines to connect sites that are geographically far apart, such as another prefecture or a remote location; a LAN, by contrast, connects a narrow area such as the same premises, the same building, or within a single floor. You tell them apart by “the breadth of the area they connect”.
用語