research the following: Advances in Ethernet technology Internetworking Operating System (iOS) and routers Based on your research and understanding, answer the following discussion questions:

Routers are computing devices which need their own operating system (OS) to function. Some vendors refer to this OS as the iOS. What are the key roles of the iOS? On the other hand, routers must have interfaces. Why must each interface belong to a different network? Why are some routers more expensive than others?