If there is more than one computing device, you need a router.
I live in an apartment building that has cable run through it. I'm a time warner subscriber with digital cable and their 'top-tier' cable internet "roadrunner with powerboost". Problem is, my internet drops out occasionally, especially when by buddy comes over and we play xbox (both online), or even with low internet demand while both dvr's are on or recording.
As far as I know there's one cable that runs up our wall, then splits in two (one for bedroom, one for living room). From there our livingroom dvr is connected via splitter along side our cable modem. I've figured that with both dvr's running and the internet being used it degrades the signal to our modem to the point that it drops out.
I've done research on bidirectional amplifiers that are modem and dvr compatable, but everyone says 'just run a line for your modem before all the splitters'. I don't have that luxury. I'm hoping someone can give me a no-bullpuck answer on if a bidirectional cable amplifier is going to benefit me, and any tips if you have them. Thanks in advance.