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As a task of my assignment, I used wireshark to capture packets. Now in Client Hello message, I saw compression method:null(0). Now I am confused what is that mean? Does that mean no compression is required? Or null(0) is itself a compression technique?

Click Here to see the image of compression method:null(0).

muru
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Nahid Hossain Shihab
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2 Answers2

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Compression method: null (0) means that the data received from the record layer will not be compressed, nowadays SSL is not doing the compression for the data received from the upper layer because HTTP is doing the job for it at layer 7.

So usually, you will find this to be set as null.

Geetansh Bhardwaj
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See section 6.2.2 and section 7.4.1.2 of RFC 5246.

Community
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