Some knowledge about peering. What is an IXP? How does an IXP (draw a diagram to explain using an online tool) how they earn money?

Explain the concept of a Virtual Private Network (VPN) and its applications in WAN connectivity.

Wireless networking has both benefits and problems. Wireless networking should not be utilized as the primary mode of data transfer in the workplace due of security concerns.

Computer Ethics questions:  Some of the world's biggest tech companies have been building and maintaining their very own VPN networks for years. They have full control over all the VPN servers connected to their network, and make their employees use the company VPN while working. This means employees need to download a VPN software to their computers and, well, you know the rest.  Explain why these companies are so obsessed with controlling their own VPN networks, and why they would want employees to use them. Use real examples or made up examples to explain, if that helps you. Take what you know and put the pieces together. Answer has to be under 101 words.