Salaries for the relatively untried average out to around $55K, but survey participants with five to 10 years of experience earn a significantly higher median of $67K. Intelligence Analysts bring in $80K after working for 10 to 20 years. Intelligence Analysts who have stuck around for more than two decades see earnings that are only slightly higher than those of folks who have worked for 10 to 20 years; the more senior group makes around $88K on average.
Most wireless access points and wireless routers can theoretically have 255 devices connected at a time. That represents a lot of computers, smartphones, tablets, cameras, and other devices and probably far exceeds the needs of the typical home.
Your data service will only work with your wireless internet card. You can easily move your card from one computer to another, but it can only be plugged into one computer at a time, unless it is a WiFi mobile hotspot, in which case it can accommodate multiple devices at once.