Take the 2-minute tour ×  I have a small home LAN. We currently
use DSL but are moving to an area where cable internet is
preferred for speed reasons (3Mbit upload vs. 768kbit).  I'm
fairly savvy w.r.t. networking, but I have no experience with
cable internet and am having a hard time translating Comcast's
marketing-speak into something I can understand.  We currently
have:    • Cisco 678 DSL router (connectivity and firewall),
which connects by Ethernet to   • LinkSys WRT54GL router running
stock firmware,     • connected by wired Ethernet to a one
desktop     • connected by wifi to two laptops  Is there way to
buy some cable modem and simply swap it in for the DSL router?
(The firewall responsibilities can be transferred to the
LinkSys, I think.)  Comcast has a list of approved modems.
Comcast will lease me a cable modem but doesn't say specifically
what it will be, and they say it's for "1 computer". So I'm
leery of this route.  share|improve this question The for one
computer just means you need a router