Wireless networks are generally not as secure as wired networks. Wired networks, at their most basic level, send data between two points, A and B, which are connected by a network cable. However, wireless networks broadcast data in every direction to every device that happens to be listening, within a limited range. A wired network can be secured at its edges, for example, by restricting physical access and installing firewalls. A wireless network with the same measures in place is still vulnerable to eavesdropping. Therefore, wireless networks require a more focused effort to maintain security.