Cisco Secure Web Applianceのどの機能が、主に悪意のあるWebサイトへのアクセスをブロックするために使用されますか？
正解：B
URL Filtering compares requested websites against Cisco security intelligence and predefined categories. Administrators can allow, block, or monitor access based on security policies, helping prevent users from visiting phishing, malware-hosting, or inappropriate websites.
