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Data Communications & Networking
POP3
POP3 (Post Office Protocol) is a protocol used to receive email from an email server to a standard email client, much like the IMAP protocol.
POP3 is the more widely used and widely supported than IMAP and this mainly due to the fact that POP3 is the older of the two formats.
SMTP
SMTP (Simple Mail Transfer Protocol) is used to send emails from an email account and is usually used in conjunction with either the POP3 or IMAP format.
Although it is now more commonly used to send emails it is also able to be used to receive email messages from a mail server.
SSL
SSL (Secure Sockets Layer) is the industry standard security protocol for use in web browsers for the encryption of data.
It is often used for online shopping and it enables the sending of sensitive data such as; credit card numbers.
Most browses will display a small padlock icon to when SSL is being used on a webpage.
USB
USB (Universal Serial Bus) is used to connect peripherals such as; mices,printers, keyboards, digital cameras, USB flash drives etc…
USB devices are ‘hot-swappable’ and this means that they can be plugged and unplugged from the computer while the operating system is running and they will be recognized.
VPN
VPN (Virtual Private Network) is used to connect two private LAN networks within a safe connection.
The connection between the two networks is virtual and it is very secure due the use of encryption.
Due to the fact that the network is virtual it is often much cheaper to set-up and run.