Definitions

1. noun

A communication loop in which the sender and receiver are the same entity, used for testing and debugging purposes in computer networks.

“The network administrator set up a loopback address to test the connection before proceeding with the installation.”

2. verb

To send a communication back to the original sender for testing and debugging purposes.

“The developer looped back the data to the server to check for any errors.”

3. adjective

Returning or directed back to the original sender, especially in computer networking.

“The loopback interface on the router was configured to route the traffic back to the original sender.”