Any help with the below questions is greatly appreciated. Switches are often prices by number of interfaces (also called ports in LAN jargon). Roughly what is the current per-interface price range for a switch consisting of only 100 Mps interfaces? List five products on the market today that provide a Bluetooth or 802.15 interface. Suppose that an intruder could insert DNS messages into and remove DNS messages from DNS servers. Give three scenarios showing the problems that such an intruder could cause. Besides a power plant or an airplane cockpit, what is an analogy of a complex distributed system needs to be controlled?