多项选择题
A. Content and URL filtering B. Intrusion Prevention C. VPN D. Virus and Phishing protection E. Content Caching
A. Preventing browsers from opening network sockets inlistening state. B. Preventingbuffer overflows. C. Preventingusers from entering unencrypted passwords D. Preventing browsers from acting as client to webservers.
A. Open mail relays are often used for spamming. B. ESMTP does NOT provide more security features than SMTP C. SMTPdoes provide authenticated email sending." D. Worms often spread via SMTP.