If you are from a networking background, all of this might make sense, but if you're not and just want to get up and running on the GCP, you'd quite possibly have a question: do I really need to know about VPCs, IP addresses and autonomous systems simply in order to use the GCP?
The answer is a resounding no. By this point, you probably have enough GCP experience to realize that you don't start every new project by creating VPCs and configuring them. Clearly, that has been done for you by the platform. The mechanism for achieving this is the default VPC.
Every project comes with a default VPC and this default VPC is preconfigured with a bunch of essential plumbing:
- One subnet in each region (so that you can create VMs in any region and have them all exist on some subnet).
- A default internet gateway (this is the IP address to which packets get sent...