Azure Application Gateway and WAF Flashcards

At which OSI layer does Azure Application Gateway primarily operate?

Answer: Layer 7 (Application)

Application Gateway operates at Layer 7, enabling routing decisions based on HTTP/HTTPS attributes such as URLs, headers, and cookies.

Which Application Gateway component is responsible for accepting incoming client connections on a specified protocol and port?

Answer: Listener

A listener checks for incoming connection requests based on protocol, port, host name, and IP address combination.

Which Application Gateway routing rule type allows you to direct requests with '/images/*' to one backend pool and '/video/*' to another?

Answer: Path-based routing

Path-based routing rules direct traffic to different backend pools based on the URL path segment in the HTTP request.

Which Azure Application Gateway SKU supports autoscaling and zone redundancy?

Answer: Standard v2

Application Gateway v2 SKUs (Standard v2 and WAF v2) support autoscaling, zone redundancy, and static virtual IP addresses.

Which Application Gateway feature ensures that requests from the same client session are always directed to the same backend server?

Answer: Cookie-based session affinity

Cookie-based session affinity uses a gateway-managed cookie to route requests from the same client session to the same backend server.

What is the purpose of connection draining in Azure Application Gateway?

Answer: Allowing existing in-flight requests to complete before a backend member is removed

Connection draining allows active requests to complete within a configured timeout period when a backend member is deregistered or removed from the pool.

Which protocol does Application Gateway use for backend health probes when no custom probe is configured?

Answer: HTTP

When no custom probe is defined, Application Gateway uses a default HTTP health probe to check backend pool member availability.