The comcast modem is a cable modem not a DSL modem so they cant be compared.
The Mediacom cable modem is just as fast as the Comcast DSL modem.
You will have to have a router to make a wifi network if you only have a wired modem.
Simple call Comcast
If you are a resident of the United States you can get it at the comcast website or if you are not a United States resident you can buy from Amazon. Or you could go to your local electronic store.
internal modem
Yes, you can. You need to connect a wireless router to the modem.
Yes and no. The iPod Touch uses whatever internet the local router is using, so if the router you are using is connected to your Comcast Internet modem, then you are using Comcast Internet. If the router you are using is using another modem, like AT&T modem, then it is using AT&T internet.
If the question is understood properly, the other QoS option that is available on a Comcast modem is VOIP. There appears to be a problem with certain Comcast routers and stacking services; however, possible solutions can be found online.
it has a chip similar to that in a laptop modem for wifi
Through the modem or wifi.
You can make WiFi with your own ball baton ads12 router modem by bridging the modem/router to work as a modem only. You then configure the D-Link's WAN for your connection.