AWS / Specialty / ANS-C01
Advanced Networking Specialty
Reason about routing in both directions, hybrid DNS, inspection paths and recovery. Practise choosing the exact layer that failed.
THE REVISION PATH
Your topics, in order.
Read. Recall. Explain the alternative.
Networking: VPC
A working connection needs the right address, a forward route, permission and a return path.
Route 53
DNS chooses an answer that clients may cache; it does not inspect or balance every application request.
CloudFront and Global Accelerator
CloudFront caches HTTP content, Global Accelerator routes network connections, and replication creates durable regional copies.
ELB & Auto Scaling
A load balancer chooses a destination; an Auto Scaling group maintains capacity; application state must survive either decision.
Monitoring & Audit
Metrics show symptoms, logs explain events, traces follow requests, and audit records identify changes.
Hybrid Routing, BGP and Direct Connect
Longest prefix first; then compare the preference rules of the actual routing system.
Hybrid DNS and Resolver Design
Inbound lets external clients ask AWS; outbound lets AWS forward selected questions elsewhere.
Transit, Inspection and Network Diagnostics
Every stateful flow needs a coherent forward and return path through the same inspection context.
How this guide is organised
Original revision notes arranged around practical decisions. The linked official objectives define the mapped scope; primary documentation supports the explanations. Read each topic, answer without looking, then explain why another option would fail.
- Official exam guide ↗ Scope authority
Revision material supports preparation; it does not guarantee every possible exam question. Check the exam version and official objectives before booking.