How to tell the type of device by MAC address?

I have a friend who uses our Wi-Fi and one of his apple devices showed up on our list of people connected. It shows the MAC address and I found a site that told me it is in fact an apple device, but doesn't say anything else.

Is there a way to find out what exactly it is such as an iPhone, iPod, or an iPad? I want to figure out because he didn't even come over today and it showed up.

Where can I watch degrassi online?

I've been trying to catch up with the previous degrassi season so I can watch season 13 and not be confused.
I'm right in the middle of season 12 but the problem is that I usually watch the episodes on my laptop on teen nick.com and my laptop's battery got fried and it's being fixed and I won't get it for like 2 weeks.
I have my iPhone and I tried going on teen nick.com but it won't let me see the videos since its the mobile version I tried muchmusic.com but it says video not available I also tried going on YouTube but most of the episodes aren't on there I've runned out of options so if you could help me find a way to watch the episodes on my iPhone I would be so grateful [

What happens when I backup my iphone with my iphone

I'm currently in vacation and my iphone lock button stopped working so I'm going to the aple store to get it fixed and i don't have a backup so i was wondering what happens when you backup your phone from your phone. Like in the setting of the iphone when you go to iCloud it asks if you want a backup. Does this mean that all my stuff will go to my computer back home? Even though I don't have a Mac?

Photo Stream on iPhone

Okay so I want to download iOS 7 and I'm afraid all my pictures I've taken will get erased if I do it! So when I download it will photo stream save all my pictures and put them back on? And if I get a new phone will photo stream put all the photos on my new iPhone?

I have an iPhone 4 by the way.

Why does my iPhone 4 keep dropping Wi-Fi?

For the last couple of months, my iPhone 4 has started dropping Wi-Fi even when I'm sitting near the router. I've had it for almost 2 yrs. What causes this?

Added (1). I've had an android phone… Hate the market, and the whole set up. All I was needing to know is how to fix it or if I'm better off using my upgrade for a 4s or 5.