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Barracuda Web Application Firewall

Glossary

vertical cloud

A cloud computing environment optimized for use and built around the compliance needs of specialized industries such as healthcare, financial services, and government operations.

virtualization

Allows multiple guest virtual machines (VM) to run on a host operating system. Guest VMs can run on one or more levels above the host hardware, depending on the type of virtualization.

VLAN
  • Also known as: Virtual Local Area Network, VLAN Interface

Any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). The physical interface behaves like several interfaces, and the switch behaves like multiple switches.

VLAN tagging
  • Also known as: Virtual Local Area Network

Method to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to the frame and sent across the trunk link. As it arrives at the end of the trunk link, the tag is removed and the frame is sent to the correct access link port according to the switch’s table, so the receiving end is unaware of any VLAN information.

VM
  • Also known as: virtual machine

An emulation of a computer system that is based on computer architectures and provides functionality of a physical computer. For example, the Barracuda NextGen Firewall Azure can be deployed as a virtual machine in the Microsoft Azure cloud.

VNET
  • Also known as: Microsoft Azure Virtual Network

A representation of your own network in the Azure cloud.

VPC
  • Also known as: virtual public cloud

An elastic network populated by infrastructure, platform, and application services that share common security and interconnection.

vSphere Client

An enhanced suite of tools for cloud computing utilizing VMware ESX/ESXi. Includesthe VMWare vCenter server and the vSphere client.

Vx

Specifies virtual model of a Barracuda products. For example, Barracuda Web Application Firewall 460 Vx.

WAN
  • Also known as: Wide Area Network, WLAN

A network connecting devices separated by large geographical distances, often joining multiple local access networks (LANs). 

WAN IP address
  • Also known as: wide area network IP

IP address used to connect your WAN to the Internet. It is shared by all devices in the WAN. 

web app
  • Also known as: web application

Client–server software application in which the client (or user interface) runs in a web browser.

web caching
  • Also known as: web cache

A core design feature of the HTTP protocol meant to minimize network traffic by storing reusable responses to make subsequent requests faster. 

web interface
  • Also known as: Web UI

Web-based user interface.

web server

A computer system that processes requests via HTTP, the basic network protocol used to distribute information on the web.

Wi-Fi

A technology for wireless local area networking with devices based on the IEEE 802.11 standards. 

Xen

Citrix hypervisor that allows to run multiple virtual machines (VMs) on one physical device.