determine if server supports resume get request

Question

How does one determine if a server supports resuming a file transfer or get request?

My thoughts were to set the header to start the get request at byte \"2\" instead of

Answer 1

Adding to @aadel's answer:

Most of the servers nowadays respond with Accept-Ranges: bytes header in case they support resuming. Postman, RequestMaker or Insomnia can help you in examining request/response headers.