A server is usually a powerful computer that provides specific services such as DHCP or file delivery to many other computers and users.

Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (email) transmission. First defined by RFC 821 in 1982, it was last updated in 2008 with Extended SMTP additions by RFC 5321, which is the protocol in widespread use today. Although electronic mail servers and other mail transfer agents use SMTP to send and receive mail messages, user-level client mail applications typically use SMTP only for sending messages to a mail server for relaying. For retrieving messages, client applications usually use either IMAP or POP3. SMTP communication between mail servers uses TCP port 25. Mail clients on the other hand, often submit the outgoing emails to a mail server on port 587.

A manufacturer of telephone receiving equipment.

Software that emulates the functionality of a physical telephone; such as Voice Operator Panel for Windows, or a large range of apps for mobile telephones.

Service Set Identifier. The name of a wireless network device. For example, the names that appear in a list of available WiFi devices are all SSIDs.

In relation to computer networks, static can refer to IP addresses that are manually assigned to a device and that do not change; or to ’static routing’ - the method of configuring routers so that they use a lookup table to pass data through network nodes. The alternatives are dynamic IP addressing (DHCP) and dynamic routing, for which there are a number of protocols.

Officially known as the notification area, the system tray (Systray) is also sometimes referred to as the shell notification area or taskbar status area. It is part of the Windows 95, 98, NT, ME, 2000, XP, Vista, 7, and 8 operating systems. This section of Windows displays small icons enabling a user to know what is currently loaded in the computer’s memory. The Systray is located at the bottom right-hand-side of the screen and is next to the current time. The systray can now be extended by clicking the up arrow within it.