This video covers the concepts around Ethernet MTU , IP MTU and TCP MSS. Ever struggled to understand what a maximum transmission unit or a TCP MSS is? Never really understood why you would change these values? Hopefully this video is here to help!

Topics covered include:
Ethernet MTU (Maximum Transmission Unit)
IP MTU (Maximum Tranmission Unit)
Fragmentation
TCP MSS (Maximum Segment Size)
TCP MSS Adjust
MTU Path Discovery with ICMP
How you would change the IP MTU or MSS for tunneling technologies like GRE.