IPA IP 2022 Question 62
A question IPA Japan published in 令和4年度 ITパスポート試験 公開問題 問62, translated into English. ITPEC is based on the same exams.
Which of the following is an appropriate description of an ad hoc network?
Explanation
A wireless network in which devices communicate directly, without an access point — that is what ad hoc mode of a wireless LAN means.
A wireless LAN runs in one of two modes. In infrastructure mode every device talks to an access point, which relays the traffic and links the wireless devices to the wired LAN. In ad hoc mode the devices form a network among themselves on the spot (ad hoc means "for this purpose"), for example two PCs or game consoles exchanging data where no access point exists.
Answer (a)
Why not others:
- •(b) — a secure private environment built over the Internet is a VPN (Virtual Private Network)
- •(c) — a server and the PCs that use it on a wired network describe a client/server LAN
- •(d) — a network linking distant sites such as a head office and branches is a WAN (Wide Area Network)
Key rule: Infrastructure mode goes through an access point; ad hoc mode connects wireless devices to each other directly.
Networks · AI-written, may contain errors
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.