How many computer systems can run on (1) Lightning DSL service ?
DSL is itself shared access. Depending on how you use the internet, you may discover that you want all the bandwidth to yourself. Sharing access through a network means opening the possibility that the action of one affects everyone’s performance. A firewall may have optional usage control policies designed to curb inefficient internet activity. You can for example, allow only e-mail on one system but full internet access on another provided your sharing appliance has this functionality. Reasonably, you should not place more than 4 machines on a Lightning DSL home account and a dozen workstations on a Lightning DSL business connection.