B

back-to-back firewalls

Firewall solution that places two firewalls in front of the internal network. This allows for resources to be placed between them in a perimeter network so that external users can access them safely. These types of setups are also known as DMZs.

baseline

Initial sampling of data that is used as a comparison point for troubleshooting system performance.

bastion host

Firewall solution that uses a single firewall in front of the internal network but does not allow for a perimeter network.

Block Inheritance

The method of stopping GPOs from upper levels within the Group Policy hierarchy from being processed unless the upper-level GPOs are enforced.

brute force attack

Attack type that attempts to break the security of a system by continuous attempts at discovering the password or encryption key.