How are BGP neighbor relationships formed Automatically through BGP
Automatically through EIGRP
Automatically through OSPF
They are setup manually

They are set up manually

Explanation:

BGP neighbor relationships formed "They are set up manually."

This is explained between when the BGP developed a close to a neighbor with other BGP routers, the BGP neighbor is then fully made manually with the help of TCP port 179 to connect and form the relationship between the BGP neighbor, this is then followed up through the interaction of any routing data between them.

For BGP neighbors relationship to become established it succeeds through various phases, which are:

1. Idle

2. Connect

3. Active

4. OpenSent

5. OpenConfirm

6. Established