Which IP address is called the loopback address, and can be used for testing and troubleshooting? seenagape 10 years ago Which IP address is called the loopback address, and can be used for testing andtroubleshooting? A.10.1.12.251 B.127.0.0.1 C.192.23.111.8 D.132.65.18.91 ← Previous question Next question →