What is the purpose of mapping vServers to FQDNs in the domain for authentication and traffic management in Citrix ADC?

• A. Fix domain session cookie resolution
• B. Improve DNS caching
• C. Increase DNS TTL
• D. Disable cookies

Answer: (A)

Mapping vServers to FQDNs in a domain ensures authentication state and traffic routing stay aligned with the exact domain name a client uses. Session cookies that establish and maintain a user’s login are scoped to a domain; when multiple vServers exist behind the same domain, the browser needs cookies to resolve to the correct endpoint. By binding each vServer to its corresponding FQDN, Citrix ADC can issue and recognize the right domain-bound cookies, so the user remains authenticated and their requests continue to hit the intended vServer.

This setup also supports proper traffic management: requests for a given domain are directed to the appropriate vServer that handles that domain’s app, enabling correct policy application and load balancing. The other options don’t address the domain-specific cookie behavior or the need to route and authenticate per domain in this way.