問88
頻出度★★★
外出先で PC をインターネットに直接接続するとき, インターネットからの不正アクセスを防ぐために使用するものとして, 適切なものはどれか。
平成29年度 春期 ITパスポート試験 問88
This question's explanation and your answers so far.
解説
問 88
Incorrectア
IC card authentication is an authentication method that uses an IC card to confirm whether the user is the legitimate person; it is not a mechanism that blocks the unauthorized access via the network itself.
- イ
正解 The correct answer is イ. A personal firewall is software that is installed on and runs on the PC itself, monitors the communication with the Internet, and blocks unauthorized connections (unauthorized access) from the outside. When you are away from the office and connect the PC directly to the Internet without going through the company's network devices, you cannot receive the protection of the corporate firewall, so a personal firewall that protects communication on the PC alone is suitable for preventing unauthorized access.
Incorrectウ
A hard disk password sets a password on the HDD to prevent unauthorized reading of the stored content (data), and is a countermeasure against information leakage in the event of theft or loss. It cannot prevent unauthorized access via communication from the Internet.
Incorrectエ
File encryption software encrypts files to protect the confidentiality of their content, and is a countermeasure that makes the data unreadable even if it is somehow handed over. It has no function to block unauthorized access from the outside via the communication path.
ここがポイント
- A personal firewall is software that monitors communication on the PC alone and blocks unauthorized access from the outside. It is effective for direct connections while away from the office, where the corporate firewall does not protect you.
- Authentication (IC card) and data protection (HDD password, file encryption) serve different purposes and cannot be used to block unauthorized access via the network.
用語