Which of the following is not considered a layer of a network architecture?

a. Access layer

b. Distribution layer

c. Core layer

d. Intranet layer

A __________ is a secure server that adds layer of security to a network and acts as a buffer between a LAN and less secure networks.

a. Honey pot

b. Back door

c. DMZ

d. Bastion host

An __________ is a combination or hardware and software that scans a computer's activities to identify active unauthorized system penetrations.

a. Intrusion detection system (IDS)

b. Intrusion Prevention System (IPS)

c. Anti-virus system

d. Firewall