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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.

virtual network computing

Graphical software that enables you to remotely control another computer, independent of platform.

virtual private gateway
  • Also known as: AWS, Amazon Web Services

The Amazon side of a VPN connection that maintains connectivity. The internal interfaces of the virtual private gateway connect to your VPC (virtual private cloud) via the VPN attachment and the external interfaces connect to the VPN connection, which leads to the customer gateway.


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.

Virus Scanner service

Service that is used to prevent, detect, and remove malicious software.

  • 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.

  • 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.


A software company that provides cloud and virtualization software and services, incuding vSphere.

  • Also known as: Microsoft Azure Virtual Network

A representation of your own network in the Azure cloud.

VNET peering
  • Also known as: Microsoft Azure Virtual Network Peer, VNET peer

In a single Azure region, connecting multiple virtual networks with a high bandwidth, low-latency connection.

  • Also known as: Voice over IP, Voice over Internet Protocol

A standard for voice communication over IP networks.

  • Also known as: virtual public cloud

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

VPC Endpoint
  • Also known as: Amazon virtual public cloud endpoint, Amazon Web Services

A feature that enables you to create a private connection between your VPC and an another AWS service without requiring access over the Internet, through a NAT instance, a VPN connection, or AWS Direct Connect.

VPC Peering
  • Also known as: Amazon Web Services, VPC peer, Amazon Virtual Private Cloud peer

Networking connection between two AWS VPCs that enables you to route traffic between them using private IPv4 addresses. 

VPN Client
  • Also known as: virtual private network client

An end device, software, or user that is seeking connection, network or data services from a VPN.

vSphere Client

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

vStorage APIs for Data Protection

VMware API that backs up and restores vSphere virtual machines.


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

  • Also known as: Wide Area Network, WLAN

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

WAN compression
  • Also known as: wide area network compression

Method to reduce traffic flow across the WAN. Barracuda NextGen Firewalls make use of Lempel-Ziv and Generic Large Dictionary compression to reduce TINA tunnel traffic. 

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. 

WAN link

Communication circuit that joins two or more local area networks (LANs) into a wide area network (WAN).

WAN Optimization

A phrase used to describe applications, products, and techiques used to manage and accelerate the flow of data across a wide area network (WAN). For example: traffic prioritization, deduplication, data compression, caching, and VPN tunneling.

  • Also known as: wireless application protocol

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

  • 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.

  • Also known as: Web Distributed Authoring and Versioning

Extension of HTTP that enables clients to perform remote web content authoring operations. 


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

Wi-Fi Access Point service

Service on the Barracuda Nextgen Firewall F-Series that provides access to wireless networks.

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. 

  • Also known as: Web Proxy Autodiscovery Protocol, WPAD

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

  • Also known as: wireless WAN

Method to connect to a wireless network. 


Standard for a Public Key Infrastructure (PKI) to create digital certificates.

X.509 certificate

A digital document that uses the X.509 public key infrastructure (PKI) standard to verify that a public key belongs to the entity described in the certificate.


An xDSL connection is a tunneled connection using Point-to-Point Protocol over Ethernet (PPPoE) or Point-to-Point Tunneling Protocol (PPTP), depending on your ISP. 


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