Firewall audit logs are records of the changes made to the firewall configuration, policies, and rules. They can help the firewall administrator to track who, when, and what changes were made to the firewall, and identify any unauthorized or erroneous modifications that could cause security issues or network outages. By consulting the firewall audit logs, the firewall administrator can investigate how the change that allowed traffic on port 80 to the web server occurred, and prevent it from happening again

Traffic flows within a datacenter typically occur within the framework of one of two models: East- West or North-South. The names may not be the most intuitive, but the East-West traffic model means that data is flowing among devices within a specific datacenter while North-South means that data is flowing into the datacenter (from a system physically outside the datacenter) or out of it (to a system physically outside the datacenter).

A warm site is a scaled-down version of a hot site. The recovery site is often only configured with power, phone, and network jacks. It may have computers and other resources, but they are not configured and ready to go.
- You bring the hardware, software, data
- A second site in the event of a disaster
- Doesn't mirror all live data