ISP Option is a term used to describe the various options available for Internet Service Providers (ISPs). The three most common options are DSL, AOL, and MSN. DSL stands for Digital Subscriber Line and is a type of broadband internet connection that uses telephone lines to transmit data. AOL stands for America Online and is an internet service provider that offers dial-up and broadband services. MSN stands for Microsoft Network and is a web portal and internet service provider owned by Microsoft.