9. Explain How Firewall, DNS, Load Balancers, and Reverse Proxy in Application Deployment 200-901 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A development team deploys a microservices application. The frontend service must communicate with a backend service over HTTPS, but the backend service only supports HTTP. The team wants to minimize changes to the backend service and also wants to cache static assets. Which component should be placed in front of the backend service?

   • AA reverse proxy that terminates HTTPS and forwards HTTP to the backend, and also caches static assets.
   • BA DNS record that points the frontend to the backend's IP address.
   • CA load balancer that distributes HTTPS traffic to the backend service.
   • DA firewall that allows HTTPS traffic and forwards it to the backend over HTTP.
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2. 7foundation · easy

   In an application deployment, what is the primary role of a firewall?

   • ATo cache static content and terminate SSL connections on behalf of the application
   • BTo filter traffic based on a set of rules to allow or deny communication to and from the application
   • CTo translate domain names into IP addresses for client requests
   • DTo distribute incoming requests across multiple application servers
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4. 8foundation · easy

   Which benefit does a load balancer provide in a multi-server application deployment?

   • AIt blocks malicious traffic based on application-layer rules
   • BIt translates domain names to IP addresses for clients
   • CIt ensures that traffic is spread across servers to prevent any single server from becoming a bottleneck
   • DIt hides the internal IP addresses of servers from external clients
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5. 9expert · hard

   A company has a web application behind a load balancer and a reverse proxy. The security team wants to block traffic from a specific country. Which component should be configured to achieve this?

   • AThe firewall, using geo-blocking rules based on source IP geolocation.
   • BThe load balancer, using a distribution algorithm that excludes certain IPs.
   • CThe DNS server, using geolocation-based DNS responses.
   • DThe reverse proxy, using URL-based access controls.
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6. 10expert · hard

   A company has a global user base and wants to ensure high availability and low latency. They have deployed the application in multiple regions, each with a load balancer. They want to automatically route users to the region with the lowest latency. Which DNS-based approach should be used?

   • AUse latency-based DNS routing, which returns the IP address of the load balancer with the lowest measured latency for the user.
   • BUse GeoDNS to route users based on their geographic location.
   • CUse a low TTL to allow clients to quickly switch between regions.
   • DUse round-robin DNS to distribute users evenly across regions.
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