Cannot connect to Xbox Live, even though successfully connected to Internet through Ethernet ...

Hi! I'll start with some background information.

I live in an apartment of all college students and I share a room with my buddy who also has an Xbox One with a wired connection. His Xbox works just fine with everything and he's never had a problem. My Xbox is only able to connect to Xbox Live when I'm
using a wireless connection. When I test connection, it says I'm connected to the Internet, but when I test multiplayer connection, it immediately says that it can't finish the tests right now and gives this "(0x000000000000000)" at the end of the sentence.
I'd much prefer to use an ethernet cable since it seems to cause less lag, but I cannot figure out what is wrong with my Xbox for the life of me.

The only thing I can think of is that it may be because my roommate is also using his ethernet cable in the same room. He did have his plugged in for a couple weeks before I ever tried using my ethernet cable so that could explain why he's never had any
issues and I've never had any success. If so, is there anyway around that? Or is that not completely irrelevant?

Any help would be greatly, greatly appreciated. Thanks so much in advance!

:)

 

How to Connect Internet Cable directly to Xbox 360

Hi everybody.

So recently I've been experiencing a lot of lag on CoD, i.e, whenever I join a game I get 2-bar and 3-bar connections. So I decided to search for some solutions. I read somewhere that I can fix this problem by directly connecting my Xbox to the router using an Ethernet cable. Now the problem arises as I do not possess an Ethernet cable.
Currently, I have a cable through which Internet is supplied (It's a Fibrenet connection, which uses Optical Fibres for transmitting the Internet) and this cable is connected to a router which provides me WiFi.
I was wondering if I can connect my Internet Cable directly to the Xbox 360 without Ethernet cables.
(The cable looks exactly like an Ethernet cable so it can fit into the Ethernet jack of the Xbox, so that problem is covered.)

EDIT : I connected the Internet Cable to the Xbox but when I tested connection, It does not connect to Internet. Help

 

Cannot Connect to XBox Live IP Address Error

Tried multiple times to connect to live. Using ethernet cable from PC directly to console. Internet Service Provider is through an Alltel Internet Card. We've gone through every step of the help and it still won't work. You cannot hook the Internet Card
directly to the XBox, however, though it is USB.