15.10. Exam Essentials
Understand the difference between a network-based firewall and a host-based firewall.
A network-based firewall is a hardware device on the network or on a router that protects a group of computers. A host-based firewall is software installed on one individual machine, and it only protects that machine.
Understand how a firewall determines which traffic can pass through it.
Firewalls use access control lists (ACLs), which are sets of rules, to determine which traffic is allowed to pass through.
Remember where a DMZ can be placed.
A demilitarized zone (DMZ) can be located outside a firewall, connected directly to the Internet. However, it can also be placed after the firewall. You need to remember that it can be placed ...
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