Answer in detail and organize it in the same order.

1. Arrange the following in order from highest to lowest regarding bandwidth: 

UTP, fiber, and coaxial cable.

2. Arrange the following in order from highest to lowest regarding cost: UTP, fiber, and coaxial cable.

3. What is power over Ethernet (PoE)?

4. Why is Poe increasingly popular in business networks?

5. List and briefly define key requirements for WLANs.

6. Do some Internet research on switching techniques used in cellular telephone networks. Are cell phone networks examples of circuit-switched networks? Why or why not?

7. How does frame relay differ from packet switching?

8. The proliferation of support for mobility and mobile applications in enterprise networks has increased the importance of mobile VPNs to support mobile business users. Do some Internet research on mobile VPNs, how they differ from conventional VPNs, and the types of business applications they support.