多項(xiàng)選擇題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.


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題Cisco Clean Access ensures that computers connecting to your network have which of the following？（）

A. No vulnerable applications or operating systems
B. No viruses or worms
C. Appropriate security applications and patch levels
D. Current IPS signatures
E. Cisco Security Agent

2.單項(xiàng)選擇題Which of these is the best way to provide sender non-repudiation？（）

A. pre-sharedkey
B. secure hash
C. SSL
D. RSA signature

3.單項(xiàng)選擇題What group in Cisco IOS does 1536-bit Diffie-Hellman prime modulus equivalent too？（）

A. group 3
B. group 1
C. group 5
D. group 7

4.單項(xiàng)選擇題What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）

A. 4 bytes for both
B. 4 bytes， and 8 bytes respectively
C. 8 bytes for both
D. 24 bytes for both

5.單項(xiàng)選擇題Which ones are the two type of ciphers？（）

A. Blocking cipher andnon-blocking cipher
B. CBC cipher and EBC cipher
C. Block cipher and Stream cipher
D. Blocker cipher and Streamer cipher
E. 3DES cipher and AES cipher