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Sanghamitra Mohanty
Query: 20 / Answer: 16

04th Jun 2017 .

Explain what is an ETag and how does it work?

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Bikram Sahoo
Query: 18 / Answer: 29

04th Jun 2017 .

An ETag is an opaque identifier allocated by a web server to a specific version of a resource found at a URL.  The ETag is a part of HTTP, the protocol for the world wide web and when the server reads the ETag from client request, the server can then tell whether to send the file (HTTP 200) or tell the client just to use their local copy (HTTP 304).

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