Which option is a common cause for access point configuration problems?

A common cause for access point configuration problems relates to the access point not receiving a DHCP lease. When an access point fails to obtain an IP address from a DHCP server, it cannot properly communicate over the network. Without an IP address, the access point will not be able to connect to the network infrastructure, limiting its ability to provide connectivity to clients. This effectively renders the access point unusable, causing access issues for devices trying to connect to it.

In contrast, while problems such as an incorrectly configured SSID, the access point being in sleep mode, or a device being denied access may also lead to issues, they do not fundamentally prevent the access point from establishing itself on the network. An incorrectly configured SSID might prevent users from connecting, but the access point may still function on the network. The access point in sleep mode may hinder performance, but it doesn’t negate the ability to receive fundamental network configurations like a DHCP lease. Device access denial is typically related to user permissions and policies, rather than a configuration issue with the access point itself.