WAN - A wide area network is a telecommunications network that goes over a large distance for the primary purpose of computer networking.
WWW - The World Wide Web, commonly known as the Web, is an information system that is used very frequently.
Packages - When you request something from the internet it gets broken down into smaller parts that get individually come to you the fastest way possible and build the site or an image, etc.
The Internet is a global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide. It is a network of networks that consists of private, public and government networks of local to global scale, linked by a broad array of electronic, wireless, and optical networking technologies.
LAN - A local area network is a computer network that interconnects computers in a limited area such as a residence, school, or office building.