令和6年度 ITパスポート試験問70

This question's explanation and your answers so far.

問70

頻出度★★★

ESSID をステルス化することによって得られる効果として, 適切なものはどれか。

出典　令和6年度 ITパスポート試験問70

解説

問 70

Incorrectア
Encrypting the communication content is the role of encryption methods such as WPA2 or WPA3. ESSID stealth only hides the network name and has no function to encrypt communication.
Incorrectイ
Authenticating the terminals that connect is handled by methods such as a pre-shared key (PSK), IEEE 802.1X, or MAC address filtering. ESSID stealth has no function to authenticate terminals.
ウ
正解 ESSID stealth is a setting in which the access point stops broadcasting its network name, the ESSID, in beacon signals to the surrounding area. As a result, the ESSID no longer appears in the list of available networks on a terminal, and a third party who does not know the ESSID has difficulty noticing that the access point exists and difficulty connecting to it. Consequently, as stated in choice ウ, the risk of unauthorized connection to the access point can be reduced.
Incorrectエ
Terminals communicating directly with each other without going through an access point is a characteristic of ad hoc mode (peer-to-peer connection) and is unrelated to ESSID stealth. Even with stealth enabled, the communication remains infrastructure communication that goes through the access point.

ここがポイント

ESSID stealth = a setting in which the access point hides its network name (ESSID) by not broadcasting it. It is a simple security measure that makes the network harder for third parties to find and thereby lowers the risk of unauthorized connection.
Distinguish the security elements of a wireless LAN: encryption (such as WPA), authentication (PSK, 802.1X, MAC filtering), and ESSID stealth each serve a different protective purpose.

用語

解答問70ウ