technical: a group of people used in a study who have something (such as age or social class) in common. Depression was a common problem for people in that age cohort.echnical: a group of people used in a study who have something (such as age or social class) in common. Depression was a common problem for people in that age cohort.
Wi-Fi is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections. A common misconception is that the term Wi-Fi is short for  wireless fidelity , however this is not the case. Wi-Fi is simply a trademarked phrase that means IEEE 802.11x.
Wireless Mesh Technology. The graphic below shows how a wireless mesh network functions when sharing an Internet connection across a Local Area Network (LAN) . As you see, only one node in the wireless mesh network needs to be directly wired to the Internet. That wired node shares the Internet connection wirelessly with the nearest cluster of nodes, which then share it with their nearest cluster of nodes and so on.