IPA IP 2025 Question 90

A question IPA Japan published in 令和7年度 ITパスポート試験公開問題問90, translated into English. ITPEC is based on the same exams.

Which of the following is an appropriate description concerning security measures for a wireless LAN?

a)API is an ID that groups multiple access points and manages them.b)SSH is a function that conceals a wireless LAN network by putting the access point into stealth mode.c)VPN is a function that refuses connections from devices other than those that have the MAC addresses registered in the access point.d)WPA2 is an encryption technology for wireless communication that has higher reliability than WEP.

Explanation

WPA2 encrypts wireless communication more securely than WEP — WEP's encryption can be broken in a short time, and WPA2 (with AES) replaced it.

WEP uses the RC4 cipher with a short, poorly handled key, and its keys can be recovered from captured traffic within minutes. WPA2 uses AES-based encryption (CCMP) and stronger key management, so it is far more reliable as a wireless LAN encryption method; WPA3 is its successor.

Answer (d)

Why not others:

•(a) — an ID that identifies a wireless LAN network, possibly across several access points, is the ESSID; an API is an interface through which programs use a function
•(b) — hiding the network by not announcing it is the SSID stealth function; SSH is a protocol for encrypted remote login
•(c) — accepting only devices with registered MAC addresses is MAC address filtering; a VPN is a virtual private network over a public network

Key rule: Wireless LAN measures: WPA2/WPA3 for encryption (not WEP), ESSID to identify the network, SSID stealth to hide it, MAC address filtering to limit devices.

Security · AI-written, may contain errors

Previous Next

Practice this exam

This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.