1. The black box is called a DSL modem. Kung familiar ka sa dial up, parang ganun din yun.

2. I'm not aware of a store here that sells it but it IS available abroad. But why buy a stand by one? Those things are quite sturdy huwag lang mag overheat or tamaan ng kidlat and pag nasira, papalitan nila yan dahil technically kanila yan, nire rent mo lang.

3. Yes, puwede. It's not a card though. It's another box with an antenna called a wireless router. And it plugs in BEFORE your DSL modem. Meaning, if you have one properly configured already, theoretically you can still have internet kahit masira ang DSL modem mo (see #2). At mas mura pa siya kesa sa DSL modem, yun nga lang, kailangan pa siya i set up using your 'cabled' computer. BTW, put a password if you don't want your neighbors using your internet connection or trying to hack into your computer.

4. No, that's a wireless LAN card. Kumbaga sa radio, yung wirless router ang nagbo broadcast at yung wireless LAN card ang nagre recieve. Most Netbooks have them built-in though so you don't really need to buy 1 -- just set it up. In fact, kung swerte ka, pag on mo pa lang nung router ma de detect na nung netbook yung signal niya pag bukas mo. Huwag mo lang kalimutan i set up pa din ang wireless router for security.