has used  to perform HTTP GET requests to check internet connectivity and identify HTTP proxy servers and other redirectors that an HTTP request travels through.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: has used  to perform HTTP GET requests to check internet connectivity and identify HTTP proxy servers and other redirectors that an HTTP request travels through. ### Response: T1016.001.