Ccna certification Practice Tests

D. 

Switch(config-if)#ip dhcp trust

 17.  Why should you always change the native VLAN?

A.  The native VLAN contains frames from all VLANs.

B.  The native VLAN is configured on all switches for logging.

C.  The native VLAN is the default on all switch ports.

D.  The native VLAN provides no encryption.

 18.  What can protect users from a phishing attack that is sent via email?

A. Training

B.  Anti-malware software

C.  Antivirus software

D. Certificates

 19.  Your company provides medical data to doctors from a worldwide database. Because of 

the sensitive nature of the data, it’s imperative that authentication be established on each 

session and be valid only for that session. Which of the following authentication methods 

provides credentials that are valid only during a specific period of time?