Free sections from Ultra Transcenders AZ-700: Designing and Implementing Microsoft Azure Networking Solutions, on the comparisons and decisions the exam keeps asking about.
How many usable addresses each prefix gives in Azure, why five are always reserved, and how to size subnets for gateways, Bastion and VMs.
Resolving Azure private zones from on-premises and on-premises names from Azure, with subnet sizing and ruleset rules.
Where each peering setting goes, what spokes can reach, and why peering isn't transitive.
Longest prefix match, system routes versus user-defined routes, and how a 0.0.0.0/0 route forces internet traffic on-premises.
What each ExpressRoute feature does, which SKUs and gateways it needs, and where it fits on a circuit.
A decision guide by traffic type (HTTP or not) and scope (regional or global).
The CNAME chain from a public service name to a private endpoint, zone groups and zone links.
Rule order, the default rules, and what happens to a flow between subnets and to return traffic.