A.Validation

B.Authorization

C.Authentication

D.Identification

A.Stations are not required to listen before they transmit.

B.Several stations are allowed to be transmitting at any given time within a single collision domain.

C.Stations are not required to monitor their transmission to check for collisions.

D.Ethernet is shared media.

A.It uses Password Authentication Protocol (PAP) for user authentication.

B.It uses Encapsulating Security Payload (ESP) for data confidentiality.

C.It uses Authentication Header (AH) for data integrity.

D.It uses Internet Protocol (IP) for data integrity.

A.Port 21

B.Port 23

C.Port 80

D.Port 53

A.VIEW /var/log/messages

B.TAIL 35 /var/log/messages

C.VIEW 35 /var/log/messages

D.TAIL /var/log/messages