$1.$ Diffie$-$Hellman Research

How does Diffie$-$Hellman key exchange protocol works? Use the Internet to research this key$-$exchange protocol. Explain the man$-$in$-$the$-$middle attack and provide a numerical example that shows how the 'man$-$in$-$the$-$middle' attack works in this protocol.

Marking Criteria:

$1$ mark for clear description of the protocol, with a numerical example.

$2$ marks for demonstration of the man$-$in$-$the$-$middle attack and providing a numerical example