Term Kind Topic What it is
Anycast concept Networking Advertising the same IP address from many locations, so the network routes each client to the topologically nearest one.
Layer 4 vs Layer 7 Load Balancing concept Networking Balancing on connection metadata (IP and port) versus on the content of the request (path, host, headers).
Subnet concept Networking A subdivision of a network's address range, used as the unit of routing and, in cloud, of availability-zone placement.
Virtual Private Cloud VPC, VNet concept Networking A logically isolated network inside a cloud provider, with an address range you control and explicit rules for what may enter and leave.