The Internet and WWW

• • The internet is a global network of interconnected computer networks that use the Internet Protocol Suite (TCP/IP) to link devices worldwide.
• Internet Protocol: A set of rules that governs how data is sent over the internet.
• • WAN is a network that covers a broad area, often a country or continent, connecting multiple LANs (Local Area Networks) together.
• PAN: Personal Area Networks are networks of devices that are connected to a central device, such as a router or switch.
• MAN: Metropolotian Area Network Metropolitan

  a computer network that connects computers within a metropolitan area, which could be a single large city, multiple cities and towns, or any given large area with multiple buildings

  understand:

  -larger than a (LAN)but smaller than a (WAN).

  -MANs do not have to be in urban areas; the term "metropolitan" implies the size of the network, not the demographics of the area that it serves.
• LAN is a network that covers a relatively small geographic area, such as a single building, campus, or office.
• SSL certificate: A digital certificate that is used to encrypt data between a web server and a web browser.

  E.g. credit card number

  -User login credentials
• HTTPS: Hypertext Transfer Protocol Secure is an extension of HTTP that adds security by using SSL/TLS encryption to protect data transmitted between a user's browser and a website.
• SMTP: Simple Mail Transfer Protocol, used to send emails from one server to another
• FTP: File Transfer Protocol, a protocol used to transfer files between a client and a server.
• VoIP:Voice over Internet Protocol, a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.

  E.g. Skype, WhatsApp