平成29年度春期 ITパスポート試験問85

This question's explanation and your answers so far.

問85

頻出度★★★

無線 LANで使用するESSID の説明として, 適切なものはどれか。

出典　平成29年度春期 ITパスポート試験問85

解説

問 85

Incorrectア
A MAC address is a hardware identification number unique to a device (an access point or a LAN interface), and is a different thing from the ESSID, which is a network name.
Incorrectイ
A channel number is a number that distinguishes the frequency band of the radio waves used, and differs from the ESSID, which is a character string that identifies the network.
Incorrectウ
The IP address of the default gateway is an address that indicates the exit to an external network, and is unrelated to the ESSID, which represents the name of the wireless network.
エ
正解 ESSID (Extended Service Set Identifier) is a string of up to 32 characters (a network name) assigned to identify a wireless LAN network. Devices configured with the same ESSID can join the same wireless network, and even when multiple access points exist nearby, the ESSID is used to distinguish which one to connect to. Therefore, option エ, which describes it as ‘a character string that identifies the wireless network’, is correct.

ここがポイント

The ESSID (SSID) is a name of up to 32 characters that identifies a wireless LAN network; devices configured with the same ESSID can connect to the same network.
Distinguish the differing roles of the MAC address (a device-unique number), the channel number (the radio frequency), and the IP address (the communication destination) from the ESSID, which is a network name.

用語

解答問85エ