When we talk about plugins installed on a WordPress multisite network, some plugins can be activated for use by the entire network while others can only be activated on a specific single site. Network Activated Plugins: The same plugin activated for a specific site: It shouldn't be too difficult to understand how it works, but we may run into problems when we try to check in code whether a plugin is activated for the entire network or only for a specific site. There are a number of different ways to accomplish this, each with its own unique features. is...