Why load balancing matters in AWS - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why use load balancing in cloud infrastructure?

Which of the following best explains why load balancing is important in cloud infrastructure?

A It evenly distributes incoming traffic across multiple servers to prevent any single server from becoming overwhelmed.

B It automatically upgrades server hardware without downtime.

C It stores all user data in one place to speed up access times.

D It encrypts all data between servers to improve security.

💡 Hint

Think about how traffic is managed when many users visit a website at the same time.

Load balancing helps by spreading user requests across multiple servers, so no single server gets too busy and slows down or crashes.

❓ service_behavior

intermediate

AWS Elastic Load Balancer behavior under high traffic

What happens when AWS Elastic Load Balancer (ELB) receives more traffic than a single server can handle?

A ELB automatically shuts down the overloaded server.

B ELB queues all requests until the server is free, causing delays.

C ELB routes traffic to multiple healthy instances to share the load and maintain performance.

D ELB rejects new requests until the server recovers.

💡 Hint

Consider how ELB helps keep websites responsive during busy times.

ELB balances traffic by sending requests to multiple servers that are healthy, preventing overload on any one server.

❓ Architecture

advanced

Designing a fault-tolerant web application with load balancing

You want to design a web application that stays available even if one server fails. Which architecture best achieves this?

A Use a load balancer that sends all traffic to one server and switches only if it fails.

B Use a single powerful server with a backup server in the same data center.

C Use multiple servers without a load balancer and let clients choose which to connect to.

D Use a load balancer to distribute traffic across multiple servers in different availability zones.

💡 Hint

Think about spreading risk across locations and servers.

Using a load balancer with servers in different zones ensures traffic is shared and the app stays online if one server or zone fails.

❓ security

advanced

Security benefits of load balancers in cloud environments

Which security feature is commonly provided by cloud load balancers?

A They can terminate SSL/TLS connections to offload encryption work from backend servers.

B They store user passwords securely for authentication.

C They scan all incoming traffic for viruses before forwarding.

D They automatically patch backend servers with security updates.

💡 Hint

Think about how encryption is handled between users and servers.

Load balancers often handle SSL/TLS termination, decrypting traffic so backend servers don’t have to, improving performance and security management.

✅ Best Practice

expert

Choosing the right load balancing algorithm for a global app

You run a global app with users in many countries. Which load balancing method best reduces latency for users?

A Use round-robin to evenly distribute users regardless of location.

B Use geo-based routing to send users to the nearest data center.

C Use least connections to send users to the server with fewest active sessions.

D Use random selection to balance load unpredictably.

💡 Hint

Think about how to make websites load faster for users far apart.

Geo-based routing directs users to the closest data center, reducing delay and improving experience worldwide.