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Barracuda Web Security Gateway

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.

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). 

WAP
  • Also known as: wireless application protocol

A technical standard for accessing information over a mobile wireless network. 

WCCP
  • Also known as: Web Cache Communication Protocol

Content-routing protocol developed by Cisco. Provides a mechanism to redirect traffic flows in real-time. Includes built-in mechanisms for load balancing, scaling, fault tolerance, and service-assurance.

Web 2.0

Term for a second generation of the World Wide Web, focused on the ability for people to collaborate and share information online. Web 2.0 describes World Wide Web sites that emphasize user-generated content, usability, and interoperability.

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. 

wireless access point
  • Also known as: wireless AP

A device that allows wireless devices to connect to a wired network using Wi-Fi or related standards. 

WPAD
  • Also known as: Web Proxy Autodiscovery Protocol, WPAD

Method used by clients to locate the URL of a configuration file, using DHCCP or DNS.