Question

A(n) _____ is a special, reserved IPv4 address (127.0.0.1) that can be used to test TCP/IP applications, where the packet is processed by IP at the lowest layer and sent up the stack to another application on that same computer.

Answer 1

Loopback

Step-by-step explanation:

The reserved IPv4 127.0.0.1 most often called as loopback is a general purpose IP used for internal testing TCP/IP applications. Is also called localhost because the computers use this IP address as their own but it doesn´t allow to communicate with other IP devices on the network.