Network Math - the Mighty Checksum!

Many of the main protocols in use today compute a checksum in order to verify that there is nothing wrong with the header. The header contains all of the protocol goodness such as addressing. This is the case with the Internet Protocol (IPv4 and IPv6). Other protocols such as TCP and UDP also add the pseudo-header to the calculation.

In this video, I will show you where the checksum can be found and go through an example on an actual packet. Now, into the header!

Here are some additional computer and network math videos:
Complements (1s and 2s) - https://youtu.be/Q0vmS_nsFo0
Cyclical Redundancy Check (CRC) - https://youtu.be/niN94QR5v0Y

Here is some more computer math (ADD, SHIFT, COMPARE, NEGATE):
Part 1 - https://youtu.be/ZyKfKME5W_c
Part 2 - https://youtu.be/zENI7ayU1bM

For similar content take a look here: https://www.youtube.com/watch?v=ZyKfKME5W_c&list=PLrancVv1TdY_-qnl_OM_sBK2l4hwAW0fz

Books and other products for networkers

Packet Guide to Core Network Protocols: https://www.oreilly.com/library/view/packet-guide-to/9781449308094/

Packet Guide to Routing and Switching: https://www.oreilly.com/library/view/packet-guide-to/9781449311315/

Packet Guide to Voice over IP: https://www.oreilly.com/library/view/packet-guide-to/9781449339661/

Network Engineering Fundamentals: https://www.oreilly.com/videos/network-engineering-fundamentals/9781491932643/

Advanced Network Engineering: https://www.oreilly.com/videos/advanced-network-engineering/9781491952559/

Virtualization, Networking, and Storage: https://www.oreilly.com/videos/virtualization-networking-and/9781491970478/