單項選擇題CSA protects your host by： （）

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.


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1.多項選擇題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.

2.單項選擇題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

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

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

4.單項選擇題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

5.單項選擇題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

6.單項選擇題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

8.單項選擇題For a router to obtain a certificate from a CA， what is the first stepof the certificate enrollment process？（）

A. the router generates a certificate request and forwards it tothe CA
B. the router generates an RSA key pair
C. the router sends its public key to the CA
D. the CA sends its public key to the router
E. the CA verifies the identity of the router
F. the CA generates a certificate request and forwards it to the router

9.多項選擇題Which two statements are correct about the aaa authentication login default grouptacacs+ localglobal configuration command？ （）

A. this login authenticationmethod list is automaticallyapplied to all lines except those that have a named method list explicitly defined
B. If the user fails the TACACS+ authentication then the local database on the router will be used to authenticatethe user
C. if the tacacs+ server fails to respond then the local database on the router will be used to authenticate the user 
D. "login" is the name of the method list being configured
E. if the tacacs+ server is unavailable， authentication will succeed automaticallyby default

10.單項選擇題Which Cisco security software product mitigates Day Zero attacks on desktops and servers - stopping known and unknown attacks without requiring reconfigurations or updates on the endpoints？（）

A. Cisco Secure Desktop （CSD）
B. NAC Appliance Agent （NAA）
C. Cisco SecurityAgent （CSA）
D. SSLVPN Client （SVC）
E. Cisco TrustAgent （CTA）