I'm just getting confused again after several years of networking. I'm getting back to the topics about Ethernet and the standards. I'm getting confused right now with the Ethernet types. Yeah I know Cisco switches and routers use ARPA which is also called Ethernet II. But going back to the drawing board, how did it all start? It's really confusing that things like 802.3 and 802.2LLC came out. What's the history of these things? After doing things like packet sniffing using Ethereal, I just saw Ethernet II. Source and Destination which consists of 12bytes plus 2bytes Type field and 4 bytes FCS so a total of 18bytes.
What is also the difference between show interface MTU and show ip interface MTU on a Cisco device? they both show 1500bytes. I want to be clear with these things again before I jump into my studies with MPLS because it discusses a lot with frame sizes. Thanks in advance guys.