單項選擇題Which of the following are not steps in setting up aTLS session？ （）

A. Client sends Hello to Server listing all of its supported cipher suites
B. Server sends Hello to Client listing all of its supported cipher suites
C. Client calculates and sends encryptedpre_master_secret
D. Client and Server calculate keys from pre_master_secret
E. Server sends Change Cipher Spec to indicate a shift to encrypted mode


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1.單項選擇題PEAP provides authentication for theEAP exchange using： （）

A. RC4
B. TLS
C. SSH
D. AES
E. 3DES

2.單項選擇題To enable TCP Port Forwarding applications using IOS WebVPN， what needs tobe downloaded to the client？（）

A. Cisco SecurityAgent （CSA）
B. CiscoTrustAgent （CTA）
C. Cisco Secure Desktop （CSD）
D. A small Java Applet
E. SSLVPN Client （SVC）
F. SSLVPN Client （SVC） and Cisco Secure Desktop （CSD）

3.單項選擇題Why is NTP an important component when implementing IPSec VPN in a PKI environment？（）

A. To ensure the router has the correct time when generating its private/public key pairs.
B. To ensure the router has the correct time when checking certificate validity from the remote peers
C. To ensure the router time is sync with the remote peers for encryption keys generation
D. To ensure the router time is sync with the remote peers during theDH exchange
E. To ensure the router time is sync with the remote peers when generating the cookies during IKE phase 1

4.單項選擇題Using FTP passive mode， after the client opens thecommand channel （port 21） to the FTP server and requests passive mode， what will be the next step？ （）

A. The FTP server sends back an acknowledgment （ACK） to the client
B. The FTP server allocates a port touse for the data channel and transmit that port number to the client
C. The FTP server opens the data channel to the client using the port number indicated by the client
D. The FTP client opens the data channel to the FTP server on Port 20
E. The FTP client opens the datachannel to the FTP server on Port 21

5.多項選擇題Which of the following statements are true？ （）

A. RC4 is a stream cipher
B. Stream ciphers require padding
C. AES is a block cipher
D. DES and 3DES are stream ciphers
E. AES is a stream cipher
F. AES， DES， and 3DES can be used as HMAC algorithms