List three input and three output devices.

Ed is building a network that supports IPv6 but needs to connect it to an IPv4 network. What type of device should Ed place between the networks?

A. A switch B. A router C. A bridge D. A gateway

____________________ is the process of attracting attention to a system by placing tantalizing bits of information in key locations.

Fill in the blank(s) with the appropriate word(s).