Free course on Computer Networking from Stanford University

I just saw a link to this page on Stanford University’s website.  They are offerring a free course on Computer Networking, entitled:  An Introduction to Computer Networks

About the Course

This is an introductory course on computer networking, specifically the Internet. It focuses on explaining how the Internet works, ranging from how bits are modulated on wires and in wireless to application-level protocols like BitTorrent and HTTP. It also explains the principles of how to design networks and network protocols. Students gain experience reading and understanding RFCs (Internet protocol specifications) as statements of what a system should do. The course grounds many of the concepts in current practice and recent developments, such as net neutrality and DNS security.

I am thinking of enrolling for a networking refresher.  Anyone else up for it?   Classes begin tomorrow.