Question: A cache server returns a copy of the cached HTML file to reduce the overhead of communi- cation with the server. Why do we need

A cache server returns a copy of the cached HTML file

A cache server returns a copy of the cached HTML file to reduce the overhead of communi- cation with the server. Why do we need to include Host: field in the HTTP GET message? why the cache server cannot use the IP address of the server instead of this field

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