Glossary

Measure of the difference in packet delay, that is, the difference in the space between packet arrival times. Jitter can be remedied somewhat with a jitter buffer.

A file system that keeps track of changes not yet committed to the file system’s main part by recording the intentions of such changes in a data structure known as a “journal”. In the event of a system crash or power failure, such file systems can be brought back online quicker with lower likelihood of becoming corrupted.

A kilobit.

A network authentication protocol, designed to provide strong authentication for client/server applications by using secret-key cryptography. Available for free from the Massachusetts Institute of Technology, also available in commercial products.

Messaging and collaboration product with functionality across platforms.

AWS template that an Auto Scaling group uses to launch EC2 instances. Contains AMI, instance type, key pair, security groups, and block device mapping.

A legacy feature of the Barracuda NG Firewall. Barracuda Networks recommends using the new Application Control in Barracuda NextGen Firewall instead.

Connection protocol used between application and Network Directory or Domain Controller. LDAPS communication is encrypted and secure.

Latest maintenance release for the previous major firmware version.