令和8年度 ITパスポート試験問64

This question's explanation and your answers so far.

問64

頻出度★★★

キャリアアグリゲーションの説明として, 適切なものはどれか。

出典　令和8年度 ITパスポート試験問64

解説

問 64

Incorrectア
A technology that switches the base station a device connects to while moving describes handover (handoff), a mechanism that keeps communication from being interrupted; it is different from carrier aggregation, which bundles frequencies to increase speed.
Incorrectイ
This describes a technology that enhances communication security functions (such as encryption and authentication); its purpose differs from carrier aggregation, which raises transmission speed.
ウ
正解 The correct answer is ウ. Carrier aggregation is a speed-up technology used in mobile communications such as LTE-Advanced and 5G. It bundles radio waves from multiple different frequency bands (carriers) and uses them simultaneously as a single, wider communication path. As the bandwidth widens, more data can be carried at once, so communication is sped up. Choice ウ, “a technology that speeds up wireless communication by bundling radio waves of multiple different frequencies,” states exactly this definition, so it is appropriate.
Incorrectエ
This describes a wireless LAN method (infrastructure mode) in which terminals communicate with each other via a base station called an access point; it is not a mobile-communication speed-up technology that bundles multiple frequencies.

ここがポイント

Carrier aggregation is a technology that bundles radio waves from multiple frequency bands to widen the bandwidth and speed up mobile communication (used in LTE-Advanced and 5G).
Distinguish similar wireless terms: do not confuse it with handover (switching base stations) or the wireless LAN infrastructure mode (via an access point).

用語

解答問64ウ