Internet Bridge C6300 – AC1750 WiFi Cable Modem Router

> Can the C6300 be setup as a bridge [...]

   "a bridge" between what and what else?  Do you mean as a modem-only
rather than as a modem+router?

> [...] or do I need to purchase addition equipment?

   To do what, exactly?

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual.  Look for "Cable Your Modem
Router to a Router or Gateway".  If you mean something else, then a
better description might help.