Choose the most correct statements about SMTP/ESMTP. ()
- 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.
正确答案:A,D
答案解析:有

微信扫一扫手机做题