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VPS Hosting Glossary

Find the definitions for Linux VPS hosting terms used throughout the VPSLink site.

A

Apache

An Open Source webserver.

Apache may be used to serve static HTML files on Link-2+ plans or dynamic database-driven sites on Link-3+ plans.

Apache HTTP Server article at Wikipedia, Apache.org project site

Arch

A Linux distribution released in March, 2002.

Offered for use with the OpenVZ virtualization platform at VPSLink.

See also: Arch Linux article at Wikipedia, ArchLinux.org

Asterisk (PBX)

A cross-platform Open Source telephony project.

May be installed with the Xen virtualization platform at VPSLink for use with SIP trunking.

See also: Asterisk (PBX) article at Wikipedia, Asterisk.org

Availability

See Uptime

B

Backbone

A primary branch of high-capacity internet routing infrastructure.

See the datacenter page for details on VPSLink's network peering and infrastructure.

See also: Internet Backbone at Wikipedia

Backups

A copy of the entire filesystem for a server which is stored on separate hardware for hardware failure and disaster recovery purposes.

See the support policies page for details on VPSLink's backup policies and procedures.

See also: Backup Guides at the VPSLink Wiki

Bandwidth

The amount of data (measured in bytes) transmitted by a server.

See the VPS hosting plan page for hosting plan allocations.

See also: Bandwidth article at Wikipedia

Bourne Again Shell (BASH)

The shell commonly used to interact with the Linux operating system.

Included as the default shell for all Linux distributions at VPSLink.

See also: Bash article at Wikipedia

C

CentOS

A Linux distribution based upon Red Hat Enterprise Linux. Originally released in December, 2003.

Offered for use on OpenVZ or Xen virtualization platforms at VPSLink.

See also: CentOS article at Wikipedia, CentOS.org

Central Processing Unit Time (CPU Time)

The amount of time spent processing a program (not including time spent waiting for input).

See also: CPU Time article at Wikipedia

Certificate Authority (CA)

A trusted entity which issues digital certificates and public keys used to authenticate in public key cryptography which is relied upon for SSL and Transport Layer Security (TLS).

See also: Certificate Authority article at Wikipedia

Cloud Computing

The cloud computing article at Wikipedia defines cloud computing as follows: "Cloud computing is Internet-based development and use of computer technology."

VPSLink does not advertise "cloud computing" services because there is not a clearly-defined, generally accepted, or functional distinction between "cloud computing" and any other kind of hosting.

Colocation

A service in which a customer's server is maintained in a commercial datacenter with no expectation of software support.

VPSLink's service is similar in the sense that subscribers have full root access and application software is unmanaged, however, VPSLink will handle all hardware and networking issues (which greatly reduces staffing, maintenance, and hardware overhead) and server management is facilitated by the Server Control Center

Command-Line Interface (CLI)

A type of interface (compare to Graphical User Interface) in which all interaction with the underlying operating system occurs through keyboard input.

The interface to BASH is a command-line interface and the primary means of server administration at VPSLink (aside from control center and control panel software) is the command-line.

See also: Command-line interface article at Wikipedia

Common Gateway Interface (CGI)

A standardized protocol for accepting requests which are passed from one application (in most cases a webserver like Apache, lighttpd, or nginx) to another (such as PHP, Perl, Ruby, or Python). CGI has been improved upon with Fast CGI (fCGI) and Simple CGI (SCGI).

See also: Common Gateway Interface article at Wikipedia

Content Management System (CMS)

An application which allows users to create and manage content. Common variations include blogs, wikis, and forums.

The wide variety of content management systems available with application stacks such as Linux/Apache/MySQL/PHP/Perl (LAMP) and Lighttpd/MySQL/PHP/Python (LMPP) make Linux VPS hosting at VPSLink (and the flexibility afforded by root access) a reliable solution for CMS hosting.

See also: List of content management systems at Wikipedia

Control Center

A web interface which provides low-level VPS start/stop/restart and DNS controls.

See the Control Center page for full details

Control Panel

A web interface (cPanel or DirectAdmin) which provides a Graphical User Interface (GUI) for system administration tasks.

See also: Control panel (web hosting) article at Wikipedia

cPanel

The industry standard web hosting control panel, cPanel provides a Graphical User Interface (GUI) for many Linux system administration tasks.

VPSLink offers cPanel licensing with the CentOS Linux distribution on Link-4+ plans under the OpenVZ or Xen virtualization platforms.

cPanel article at Wikipedia, cPanel.net site, and WHM / cPanel VPS for Web Hosting Resellers page at VPSLink.com

Cross-platform/Apache/MySQL/PHP/Perl (XAMPP)

An application stack which includes MySQL, Apache, PHP, and Perl.

Recommended for Link-3+ plans at VPSLink.

XAMPP article at Wikipedia, XAMPP.org project site

D

Daemon

A program which runs outside of a direct user-initiated context. Webserver applications such as Apache and database applications like MySQL which remain resident in memory to respond to requests are daemons.

See also: Daemon (computer software) article at Wikipedia

Debian

A Linux distribution released in August, 1993.

Debian is one of the more popular Linux operating systems offered at VPSLink and is available on both the OpenVZ and Xen virtualization platforms.

Debian article at Wikipedia, Debian.org project site

Dedicated Server

A type of hosting service similar to colocation in which a subscriber rents the use of a physical server which is usually located within a datacenter.

Compare to the Virtual Private Server (VPS) hosting service offered at VPSLink.

See also: Dedicated hosting service article at Wikipedia

DirectAdmin

A control panel for CentOS, Fedora, and Debian Linux distributions.

DirectAdmin is available at VPSLink on the OpenVZ virtualization platform with a Link-4+ plan.

Disk Space

The amount of data (measured in bytes) stored on the server's filesystem.

Note that, in the context of VPS hosting, disk space is measured in Gigabytes and will always be allocated to core operating system files (usually under 1 GB) and, on the Xen platform, disk space equal to two times the RAM will be allocated to swap space.

Domain Name System (DNS)

An underlying internet system which provides a mapping between domain names and the IP addresses used for routing.

If a DNS server application is installed on your VPS, you can manage zones through configuration files; if you elect to use the VPSLink DNS, you can manage your configuration through the Control Center. (Reverse DNS (rDNS) is managed at the Control Center in either case)

See also: Domain Name System article at Wikipedia

E

Exim

See Mail Transfer Agent (MTA)

eXtensible Markup Language (XML)

A specification for encoding documents and flat file databases. See HTML for details on one implementation of XML.

XML article at Wikipedia, XML Specification at the World Wide Web Consortium

eXtensible Messaging and Presence Protocol (XMPP)

An Instant Messaging (IM) protocol (formerly known as "Jabber") established in 1999.

Recommended for a Link-2+ plan at VPSLink.

XMPP article at Wikipedia, XMPP.org

F

Fantastico

A commercial (as opposed to Open Source) application used to support cPanel shared hosting web application installation.

VPSLink does not offer Fantastico with WHM/cPanel licensing, however, Fantastico licensing may be acquired directly from its publisher Netenberg.

See also: Fantastico (web hosting) article at Wikipedia

Fedora

A Linux distribution released in November, 2003.

Offered for use on OpenVZ and Xen virtualization platforms at VPSLink.

Fedora VPS Hosting product page, Fedora (operating system) article at Wikipedia, FedoraProject.org

File Transfer Protocol (FTP)

A TCP/IP protocol intended for transferring data.

An FTP daemon must be installed and running on the server (FTP is not supported by default with Linux installations at VPSLink - use SCP instead).

File Transfer Protocol article at Wikipedia

FreeNX

A technology developed by NoMachine which allows remote clients to access GNOME or KDE desktops (running under X Window System).

Very similar to Virtual Network Computing (VNC). Available at VPSLink on Link-4+ plans with a pre-configured Ubuntu template.

Ubuntu VPS Hosting product page, NX technology article at Wikipedia, NoMachine.com

Fully-Managed

A type of hosting service which includes support for hardware, operating system, and application-level installation and configuration. Generally considered a premium service.

Compare to unmanaged hosting as offered at VPSLink.

See also: Managed dedicated server article at Wikipedia

G

Gentoo

A Linux distribution authored by Daniel Robbins in December, 1999. Gentoo relies heavily upon code compilation and is a popular Linux operating system amongst software developers.

A Link-3 (or better) plan is recommended for the use of Gentoo at VPSLink.

See also: Gentoo Linux article at Wikipedia, Gentoo.org project site

Gigabyte (GB)

A unit of measure for data equivalent to one billion (1,000,000,000) bytes. The gigabyte unit was formerly understood in some uses to mean 10243 bytes (known as a "gibibyte"), however, the billion-byte gigabyte became the de facto standard when it was accepted by the IEEE in 2000.

See also: Gigabyte and Gibibyte articles at Wikipedia

GNU Network Object Model Environment (GNOME)

A common Linux Graphical User Interface based in the X Window System.

The default desktop environment for the Ubuntu and offered with the FreeNX operating system template at VPSLink.

Note: Virtual Network Computing (VNC) configurations recommended for the Xen platform on Link-4+ plans at VPSLink.

See also: GNOME article at Wikipedia, GNOME: The Free Software Desktop Project site

Graphical User Interface (GUI)

A type of user interface which allows the user to interact with the underlying operating system in more ways than typing (compare to Command-Line Interface (CLI)). The X Window System is the basis for common Linux desktop environments like GNOME and KDE.

Servers (particularly those used for reseller hosting) may also implement web-based control panels which mimic a desktop environment and simplify system administration tasks.

See also: Graphical user interface article at Wikipedia

H

Hardware Node

The physical hardware which runs Virtualization Platform software and hosts one or more Virtual Private Servers (VPS).

See also: Server (computing) article at Wikipedia

Host

This term may refer to the act of providing hosting service, to a Hardware Node, or to a specific Virtual Private Server.

HyperText Markup Language (HTML)

A standard for document presentation markup syntax. Primarily used to present text and multimedia content. The HTML specification is managed by the World Wide Web Consortium (W3C).

See also: HTML article at Wikipedia, W3C.org

Hypertext Transfer Protocol (HTTP)

A TCP/IP protocol intended for transferring HTML data and multimedia files referenced by HTML documents.

Popular Linux HTTP servers commonly used at VPSLink include Apache (recommended for Link-3+ plans) and lighttpd (recommended for Link-1+ plans).

See also: Hypertext Transfer Protocol article at Wikipedia, Hypertext Transfer Protocol - HTTP/1.1 RFC

I

Instant Messaging (IM)

A text-based form of real-time communication conducted over the internet (compare to Internet Relay Chat (IRC)). Accepted IM protocols include eXtensible Messaging and Presence Protocol (XMPP).

See also: Instant messaging article at Wikipedia

Internet Control Message Protocol (ICMP)

A low-level protocol used in the implementation of Internet Protocol (IP). ICMP is exposed in two valuable applications - ping (used to determine whether a Host is online and responding to requests) and traceroute (used to determine the routeable path to a host, if one exists).

See also: Internet Control Message Protocol article at Wikipedia, RFC792

Internet Message Access Protocol (IMAP)

A popular e-mail retrieval protocol (compare to Post Office Protocol (POP)) commonly served on port 143.

See also: Internet Message Access Protocol article at Wikipedia, RFC3501

Internet Protocol (IP)

The packet-switched network routing protocol commonly used in combination with either Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) to communicate application data over the internet.

See also: Internet Control Message Protocol (ICMP), Internet Protocol article at Wikipedia, RFC791

Internet Relay Chat (IRC)

A text-based form of real-time communication conducted over the internet (compare to Instant Messaging (IM)). IRC client software may be run on any VPSLink plan, however, IRC server software is recommended for Link-2+ plans.

See also: Internet Relay Chat article at Wikipedia

IP Address

A unique binary number designated to each device connected to the internet. Expressed in decimal (IPv4 - 127.0.0.1) or hexadecimal (IPv6 - 0:0:ffff:7f00:1) notation.

See also: IP address article at Wikipedia

J

Java

A software development platform (including a programming language and a "virtual machine" intended to support cross-platform application deployment) developed by Sun Microsystems in the 1990's.

A Link-4+ plan on the Xen virtualization platform is recommended for the development and use of Java applications.

See also: Xen VPS Hosting product page, Java (software platform) article at Wikipedia, Java.com

K

K Desktop Environment (KDE)

A common Linux Graphical User Interface based in the X Window System.

Note: Virtual Network Computing (VNC) configurations recommended for the Xen platform on Link-4+ plans at VPSLink.

See also: KDE Software Compilation 4 article at Wikipedia, KDE.org

Kernel-based Virtual Machine (KVM)

A Virtualization Platform based in the Linux kernel which offers hardware-assisted virtualization and limited paravirtualization on Intel VT and AMD-V chipsets.

Kernel-based virtualization is not used at VPSLink - see OpenVZ and Xen entries for more information on supported platforms.

See also: Kernel-based Virtual Machine article at Wikipedia, Linux-KVM.org

L

lighttpd

An Open Source HTTP server (commonly pronounced "lighty") designed for performance and reliability. Lighttpd is presently gaining in popularity over Apache with the appearance of the Lighttpd/MySQL/PHP/Python (LMPP) stack as an application platform.

VPSLink offers a preconfigured lighttpd/Debian operating system template for use with all plan levels.

See also: Debian VPS Hosting product page, lighttpd article at Wikipedia, Lighttpd.net

Lighttpd/MySQL/PHP/Python (LMPP)

A web application stack based upon lighttpd, MySQL, , and/or (compare to Linux/Apache/MySQL/PHP/Perl (LAMP)).

VPSLink offers a preconfigured LMPP/Debian operating system template for use with all plan levels.

See also: Debian VPS Hosting product page, article at Wikipedia, Lighttpd.net

Lightweight Directory Access Protocol (LDAP)

An application protocol which supports client access to directory services (typically over port 389) over TCP/IP.

See also: Lightweight Directory Access Protocol article at Wikipedia

Linux

An operating system developed by Linus Torvalds in 1991. Linux evolved from MINIX (an Open Source derivative of UNIX).

You do not need to know the history of Linux to run a Virtual Private Server, though it helps to have a rabid interest in all things Linux. Knowledge is power.

See also: Linux article at Wikipedia, Linux.org

Linux/Apache/MySQL/PHP/Perl (LAMP)

A web application stack based upon Linux, Apache, MySQL, PHP, and/or, Perl (compare to Lighttpd/MySQL/PHP/Python (LMPP)).

See also: LAMP (software bundle) article at Wikipedia

M

Mail Transfer Agent (MTA)

A daemon which transfers e-mail messages between servers.

Any VPSLink plan may be used to run mail server software like Exim or Postfix, however, a Link-2+ plan is recommended for busy mail servers.

See also: Message transfer agent article at Wikipedia

Mail User Agent (MUA)

A client application used to read e-mail messages retrieved from a server.

See also: Email client article at Wikipedia

Megabyte (MB)

A unit of measure for data equivalent to one million (1,000,000) bytes. The megabyte was formerly understood in some uses to mean 10242 bytes, however, the million-byte megabyte became the de facto standard in 2007 when it was recognized as such by IEC, IEEE, EU, and NIST.

See also: Megabyte article at Wikipedia

Mirror

A server which provides a copy of material hosted elsewhere (generally for purposes of redundancy under high load). May also be used to provide edge-caching.

See also: Mirror (computing) article at Wikipedia

MySQL

An open source object-relational database management system released in 1995 which supports the Structured Query Language (SQL) standard.

A Link-3+ plan is recommended for MySQL use at VPSLink.

See also: MySQL article at Wikipedia, dev.mysql.com

N

Name Server

A DNS server.

Although any VPSLink plan level may be used to run a DNS daemon, VPSLink offers a full-featured hosted DNS service through the Control Center to allow plans with insufficient memory allocations for a DNS daemon to host domains.

See also: Name server article at Wikipedia

Node

See Hardware Node.

O

OpenVZ

A virtualization platform based upon the commercial Virtuozzo virtualization software. OpenVZ hosts individual virtual private servers by managing calls to the kernel - it does not offer complete isolation, as each virtual private server must be using the same Linux kernel (compare to Xen paravirtualization), however, the performance penalties associated with OpenVZ virtualization are less severe.

See also: OpenVZ VPS Hosting product page, OpenVZ article at Wikipedia, OpenVZ.org

Open Source

A method of distributing and licensing software such that its source code is publicly available for review.

Advantages attributed to open source software include improved security as a result of community code review, rapid release and bugfix cycles, and the fact that many open source applications and operating systems are freely available and licensed such that no fees are associated with use.

All Linux distributions and bundled operating system template software available at VPSLink are open source (cPanel and DirectAdmin are available separately as licensed installations).

See also: Open source article at Wikipedia

P

Package manager

Linux distributions commonly include a package management system to facilitate the installation of application software (often pre-packaged in binary format).

Package managers available for Linux distributions at VPSLink include:

See also: Package management system article at Wikipedia

Perl

A programming language developed by Larry Wall in 1987 and adapted to a wide variety of uses - from system administration scripting to web application development.

Perl is available (and often installed by default) with all VPSLink operating system templates.

See also: Perl article at Wikipedia, Perl.org

PHP

A scripting language developed by Rasmus Lerdorf in 1995 and primarily used for web development (though a Command-Line Interface (CLI) has since been added). The "PHP" acronym recursively stands for "PHP: Hypertext Processor".

VPSLink provides preconfigured Lighttpd/MySQL/PHP/Python (LMPP) and Linux/Apache/MySQL/PHP/Perl (LAMP) operating system templates; a Link-3+ plan is recommended for dynamic web applications.

See also: LAMP VPS Hosting product page, PHP article at Wikipedia, PHP.net

Platform

See Virtualization Platform

Post Office Protocol (POP)

An e-mail retrieval protocol (compare to Internet Message Access Protocol (IMAP)) commonly served on port 110.

See also: Post Office Protocol article at Wikipedia

Postfix

See Mail Transfer Agent (MTA)

PostgreSQL (pgSQL)

An open source object-relational database management system developed in the late 1980's which supports the Structured Query Language (SQL) standard.

A Link-3+ plan is recommended for PostgreSQL use at VPSLink.

See also: PostgreSQL article at Wikipedia, PostgreSQL.org

Provisioning

The process of allocating resources for a VPS on a hardware node.

As VPSLink maintains a large pool of hardware nodes, new service is provisioned instantly upon order acceptance and payment verification.

See also: Provisioning article at Wikipedia

Proxy server

An intermediary server which relays requests between two points. Proxies are used for a wide variety of reasons including security and anonymity.

All VPSLink operating system templates include a Secure Shell (SSH) daemon which may be used to run a SOCKS proxy to relay requests through your VPS.

See also: Proxy server article at Wikipedia

Python

A programming language developed by Guido van Rossum in 1991. Python differs from other languages with the use of indentation for conditional and iterative block delimiters.

See also: Python (programming language) article at Wikipedia, Python.org

Q

No terms on file.

R

Random Access Memory (RAM)

Memory available to applications at run-time. Unlike disk space, RAM is volatile and information held in RAM will not persist if the VPS is stopped or restarted.

RAM (advertised for VPSLink plans in megabytes) may be supplemented by swap space on the Xen platform.

See also: Random-access memory article at Wikipedia

Redundant Array of Independent Disks (RAID)

An array of hard disks synchronized to provide one or more of the following: mirroring (copies of the data are stored on multiple hard disks), striping (data is split across multiple hard disks to allow for synchronous reading), and fault tolerance (data is checked for parity and automatically corrected if corruption is encountered).

VPSLink uses RAID-5 (striped disks with distributed parity) arrays on the hardware configuration for Link-1 through Link-3 plans; RAID-10 (mirrored and striped disks) arrays are used for plans Link-4 and Link-5.

See also: RAID article at Wikipedia

Request For Comments (RFC)

A document published by the Internet Engineering Task Force which describes the intended operation of Internet-related protocols and systems.

See also: Request for Comments and Internet Engineering Task Force articles at Wikipedia

Reseller Hosting

A variety of hosting specifically intended for resale to other hosting customers. Reseller hosting solutions typically include a control panel to simplify system administration, account management, and hosting functions for customers.

See also: WHM / cPanel and DirectAdmin product pages, Reseller web hosting article at Wikipedia

Reverse DNS (rDNS)

Where "forward" DNS maps human-recognizable names to the IP addresses of servers, reverse DNS maps the IP addresses of servers to human-recognizable names. An IP address may have only one reverse DNS PTR record associated with it. PTR records are commonly used as part of e-mail server identification.

The Control Center provides reverse DNS controls which allow subscribers to set and modify the reverse DNS entries for IP addresses assigned to their VPS.

See also: Reverse DNS lookup article at Wikipedia, Server Control Center Features page

Root Access

By default, the root account is the administrator account on any Linux system.

All VPSLink plans include access to the root account.

See also: Superuser article at Wikipedia

Ruby on Rails (RoR)

A web application stack based upon the Ruby programming language, a webserver (like Apache or lighttpd), and a database server (like MySQL).

See also: Ruby on Rails product page, Ruby on Rails article at Wikipedia, RubyOnRails.org

S

Secure Copy (SCP)

A secure protocol for transferring files over a network. Compare to File Transfer Protocol (FTP).

See also: Secure copy article at Wikipedia, Server Management Tools at the VPSLink Wiki

Secure File Transfer Protocol (SFTP)

A secure protocol for transferring files over a network. Compare to File Transfer Protocol (FTP).

See also: Secure copy article at Wikipedia, Server Management Tools at the VPSLink Wiki

Secure Shell (SSH)

A protocol used to exchange data over a network and the most commonly-used software for Linux server administration.

Root access over SSH is included with every VPSLink plan.

See also: Secure Shell article at Wikipedia, Server Management Tools at the VPSLink Wiki

Secure Socket Layer (SSL)

See Transport Layer Security (TLS)

Sendmail

See Mail Transfer Agent (MTA)

Shared Hosting

See Reseller Hosting

Simple Mail Transfer Protocol (SMTP)

The protocol used by Mail Transfer Agents to transmit messages between servers.

A Link-2 plan (or better) is recommended for e-mail server applications at VPSLink.

See also: Simple Mail Transfer Protocol article at Wikipedia

Slackware

A Linux distribution authored by Patrick Volkerding in 1993.

Offered for use on the OpenVZ virtualization platform at VPSLink.

See also: OpenVZ VPS Hosting product page, Slackware article at Wikipedia, Slackware.com

Structured Query Language (SQL)

The most widely-used database query language. Used by popular relational database management systems like MySQL and PostgreSQL.

See also: SQL article at Wikipedia

Swap Space

Disk space allocated for use by the Linux kernel as a paging file or "virtual memory" when Random Access Memory (RAM) is exhausted.

The Xen platform at VPSLink supports the use of swap space, however, relying upon swap space for day-to-day operations is not recommended as disk I/O is considerably slower than RAM access.

See also: Xen VPS Hosting product page, Paging article at Wikipedia

T

TCP/IP

See entries for Transmission Control Protocol (TCP) and Internet Protocol (IP)

Telnet

A protocol used to exchange data over a network; formerly used for server administration. Superseded by Secure Shell (SSH) for server administration but still used for other Command-Line Interface (CLI) applications.

See also: Telnet article at Wikipedia

Terrabyte (TB)

A unit of measure for data equivalent to one trillion (1,000,000,000,000) bytes.

See also: Terabyte article at Wikipedia

Transmission Control Protocol (TCP)

A core, low-level Internet protocol which governs stateful connections, segment size, packet order, and rate of data exchange between two hosts.

See also: Internet Protocol (IP), Transmission Control Protocol article at Wikipedia

Transport Layer Security (TLS)

A cryptographically-secured protocol for exchanging information over a network. The TLS protocol supersedes SSL as the standard for electronic commerce security over HTTP.

See also: Transport Layer Security article at Wikipedia

U

Ubuntu

A Linux distribution released on October 20th, 2004.

Offered for use on OpenVZ or Xen virtualization platforms at VPSLink.

See also: Ubuntu VPS Hosting product page, Ubuntu (operating system) article at Wikipedia, Ubuntu.com

Unmanaged

A variety of hosting support arrangement in which the subscriber is given root access and is expected to administer his or her own service. Compare to fully-managed hosting (which generally does not include root access).

VPSLink offers unmanaged hosting with 24/7/365 support for hardware and network issues which prevent or interfere with administrator access to the virtual private server.

See also: Support Policies page, Web hosting service article at Wikipedia

Uptime

The measure of time a server is accessible from the network and capable of responding to requests.

See also: VPSLink Service Level Agreement, Uptime article at Wikipedia

User Datagram Protocol (UDP)

A low-level protocol which offers stateless data transmission (compare to TCP) in which packets may be received out of order, duplicated, or in an otherwise unreliable fashion. Popular for "real-time" applications like video streaming in which high throughput and low overhead are considered the highest priority.

See also: User Datagram Protocol article at Wikipedia

V

Virtual Dedicated Server

See Virtual Private Server (VPS)

Virtual Network Computing (VNC)

A Graphical User Interface (GUI) implementation which relies upon remote framebuffer protocol to provide a remote user or users with access to a "desktop" GUI on a server.

See also: FreeNX (available at VPSLink), Virtual Network Computing article at Wikipedia

Virtual Private Network (VPN)

A network configuration which simulates hardware links between networked computers and secure tunnels are used to exchange data over the internet.

A Link-2 plan (or better) is recommended for VPN applications at VPSLink.

See also: Virtual private network article at Wikipedia, OpenVPN.net

Virtual Private Server (VPS)

A server running within a virtual environment. The server's interactions with underlying hardware are abstracted such that the server's operating system behaves as though it were running on traditional hardware, however, the server is actually interacting with a virtualization platform that negotiates requests to hardware resources for multiple servers running on the same hardware.

See also: VPS Hosting product page, Virtual private server article at Wikipedia

Virtualization Platform

A hardware configuration, piece of software, or combination thereof which supports the creation of virtual environments.

VPSLink offers OpenVZ and Xen virtualization platforms.

See also: OpenVZ vs Xen comparison page

W

Web Host Manager (WHM)

See Reseller Hosting

WHOIS

A query/response protocol used to retrieve information about a domain from a DNS server.

See also: WHOIS article at Wikipedia

X

X Window System (X or X11)

A software framework and network protocol used to provide a Graphical User Interface (GUI) on many Linux systems.

VPSLink operating system templates do not include the X Window System by default and lower-level plans do not have sufficient resources to support a GUI: familiarity with the BASH shell is recommended. A Link-4 plan (or better) is recommended for the use of Virtual Network Computing (VNC) or FreeNX.

See also: X Window System article at Wikipedia, X.org

Xen

A virtualization platform which began as a research project at the University of Cambridge and was released as open source software in 2003. Xen utilizes paravirtualization to hook calls to the hardware node's resources (compare to OpenVZ virtualization).

See also: Xen VPS Hosting product page, Xen article at Wikipedia, Xen.org

Y

No terms on file.

Z

Zen

See Xen

Zone

A portion of Domain Name System (DNS) namespace which has been delegated. For the purposes of running a DNS server, this would be the portion of the namespace which is hosted on one's server.

See also: DNS zone article at Wikipedia, RFC 1035