Okay so first of all thanks a lot. Secondly I am a complete Layman in this field so I may ask annoying questions once in a while.
1.> I would like if you elaborate this - "you can use the
TP-Link as a bridge and broadcast your 450's SSID and network, to a wider range". From your explanation what I understand is that this
router need not be connected to my modem (450TC1) with a wire into WAN or Internet port of the Router, instead I could place it in another room, as long as it is in the range of the modem and it will throw the signal or broadcast it.
Yes. Exactly so. And the TP-Link router I suggested supports it.
http://screensnapr.com/e/fFnHY3.jpg
Although, that means you will be using 802.11G. And not the faster 150Mbps or 300Mbps 802.11N. And thus, I say that bridging should be your second option if and only if the TP-Link doesn't broadcast to your entire home, or those places where you need internet.
2.> Also from what I have heard is that routers generally need 2 wired connections that is one from the modem and one that goes from the router to the computer. Does the Tp-link one need these connections or does it wireless-ly broadcast my modem's signal (450TC I think is a modem\router).
Your network is hosted by your router. Every device on your network has to have a wired or a wireless connection with your router. A wired connection from your modem to your router, lets you access internet from every device connected to your router.
A modem hosts internet. And a router shares it to everything.
Your 450TC is both, a modem and router.
When you make the switch, you'll be using the 450TC exclusively as a modem and the TP-Link as a router, if you use the normal connection. Or, if you choose a bridge connection, the 450TC will be your modem and primary router, and the TP-Link will be your secondary, broadcasting router.
If you need only internet on your PC, you can connect it to your modem. If you need file sharing over your network too, then connect the PC to your router. (Remember which is or isn't a router according to your case and what you choose to do, i.e., a bridged or a wireless connection.)
Anything else, let me know
🙂.