Xbox 360 Live Main Issues

when you try to connect to Xbox Live you may experience some issues & then you'll find it asking you to test your connection on the System area on the Xbox 360 console dashboard, The connection test screen is divided into 8 parts when of them will fail to connect & it will be the reason you couldn't access to Xbox Live so let's go on these 8 parts & see how to resolve the issue of each of them:

1. Network adapter.

2. Wireless Network.

3. IP Address.

4. DNS.

5. MTU.

6. ICMP.

7. Xbox Live.

8. NAT.

And there is some information like new terminologies that some of us may face while connecting to Xbox Live so i gathered some of them in this link.
If you have any further inquires please don't hesitate to send it to me.