单项选择题

The key lengths for DES and 3DES， respectively， are：（）

A. 128 bits and 256 bits
B. 128 bits and 384 bits
C. 1024 bits and 3072bits
D. 64 bits and 192 bits
E. 56 bits and 168 bits
F. 128 bytes and 384 bytes

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多项选择题

Which algorithms did TKIP add to the 802.11 specification？（）

A. key mixing
B. AES-based encryption
C. anti-replay sequence counter
D. message integrity check
E. cyclic redundancy check

多项选择题

Whenever a failover takes place on the ASA （configured for failover）， all active connections are droppedand clients must re-establish their connections unless：（）

A. The ASA is configured for Active-Standby failover.
B. The ASA is configured for Active-Activefailover.
C. The ASA is configured for Active-Active failover and a state failover link has been configured.
D. The ASA is configured for Active-Standby failover and a state failover link has been configured.
E. The ASA is configured to use a serial cable as the failover link.
F. The ASA is configured for LAN-Based failover

多项选择题

Whattwo things must you do onthe router before generating an SSH key with the "crypto key generate rsa"IOS command？（）

A. Configure the SSH version that the router will use
B. Configure the host name of the router
C. Enable AAA Authentication
D. Configure the default IP domain name that the router will use
E. Enable SSH transport support onthe vty lines