平成28年度 秋期 ITパスポート試験 問68

※ Our check while writing this explanation could not fully confirm the published answer; scoring follows IPA's official key.

• ×Incorrectア

  Bluetooth is a wireless communication standard that connects devices over a short range of a few meters, used for device-to-device connections such as mice and earphones. It is not a name that identifies a wireless LAN network, so it is wrong.

• ○イ

  正解 The correct answer is (イ) ESSID. ESSID (Extended Service Set Identifier) is the identifying name given to a wireless LAN network; when several access points make up the same wireless LAN, it is used to identify them together. When the ESSID set on an access point matches the ESSID the device is trying to connect to, this determines which wireless LAN the device joins. Therefore, the one that is “used to identify a network” is ESSID.

• ×Incorrectウ

  LTE is a high-speed communication standard for mobile phone lines (mobile communication); it is the name of a communication method, not a network identifier. It has nothing to do with identifying a wireless LAN, so it is wrong.

• ×Incorrectエ

  WPA2 is a security standard (an authentication and encryption method) that encrypts and protects wireless LAN communication. It is meant to “protect” the network, not to “identify” it, so it is wrong.