Understanding Firewall Fundamentals

Question 1

Which firewall methodology requires the administrator to know and configure all the specific ports, IPs, and protocols required for the firewall?

Answer 1

Packet filtering

Question 2

Which technology dynamically builds a table for the purpose of permitting the return traffic from an outside server, back to the client, in spite of a default security policy that says no traffic is allowed to initiate from the outside networks?

Answer 2

Stateful filtering

Question 3

What does application layer inspection provide?

Answer 3

Enables a firewall to listen in on a client/server communication, looking for information regarding communication channels

Question 4

What Layer would you Implement a transparent firewall at?

Answer 4

Layer 2

Question 5

What is the specific term for performing NAT for multiple inside devices but optimizing the number of global addresses required?

Answer 5

PAT

Question 6

What term refers to the internal IP address of a client using NAT as seen from other devices on the same internal network as the client?

Answer 6

Inside local

Question 7

What describes a rule on the firewall which will never be matched because of where the firewall is located in the network?

Answer 7

Orphaned rule

Question 8

What is the long-term impact of providing a promiscuous rule as a short-term test in an attempt to get a network application working?

Answer 8

The promiscuous rule may be left in place, leaving a security hole