Why load balancing matters in GCP - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why use load balancing in cloud infrastructure?

Imagine you have a website that many people visit at the same time. What is the main reason to use load balancing?

A To store user data securely in a single server for faster access.

B To distribute user traffic evenly across multiple servers to prevent any single server from being overwhelmed.

C To increase the size of a single server's hard drive automatically.

D To reduce the number of servers needed by combining their power into one.

💡 Hint

Think about what happens when too many people try to use one server at once.

Load balancing helps by spreading the work across many servers. This keeps the website fast and reliable even when many users visit at the same time.

❓ service_behavior

intermediate

What happens if a server behind a load balancer fails?

In a cloud setup with a load balancer, if one server stops working, what does the load balancer do?

A It automatically stops sending traffic to the failed server and routes requests to healthy servers.

B It keeps sending traffic to the failed server until it is manually removed.

C It shuts down all servers to prevent errors.

D It duplicates the failed server to create a new one instantly.

💡 Hint

Think about how to keep the website working smoothly even if one server has a problem.

The load balancer checks server health and stops sending traffic to any server that is not responding. This keeps the service available by using only healthy servers.

❓ Architecture

advanced

Designing a scalable web application with load balancing

You want to design a web app that can handle sudden spikes in user traffic without slowing down. Which architecture best supports this?

A Use a single powerful server with a large CPU and memory to handle all traffic.

B Use multiple databases without load balancing to store user data.

C Use a load balancer to distribute traffic across multiple auto-scaled instances of the app servers.

D Use a load balancer but keep only one app server running at all times.

💡 Hint

Think about how to add or remove servers automatically based on traffic.

Using a load balancer with auto-scaling app servers allows the system to add more servers when traffic increases and remove them when traffic decreases, keeping performance steady and costs efficient.

❓ security

advanced

How does load balancing improve security in cloud services?

Which security benefit does a load balancer provide in a cloud environment?

A It replaces firewalls by blocking all incoming traffic by default.

B It encrypts all data stored on the servers automatically.

C It stores user passwords securely in the load balancer itself.

D It can help protect against denial-of-service (DoS) attacks by spreading traffic and filtering bad requests.

💡 Hint

Think about how spreading traffic can help handle attacks that flood servers.

Load balancers can detect unusual traffic patterns and distribute or block harmful traffic, helping to reduce the impact of DoS attacks and improve overall security.

✅ Best Practice

expert

Choosing the right load balancing method for global users

Your app has users worldwide. Which load balancing method best reduces latency by sending users to the closest server?

A Use geo-based load balancing that routes users to the nearest regional server.

B Use round-robin load balancing that sends requests in order to each server regardless of location.

C Use a single global server with a load balancer to handle all traffic.

D Use random load balancing that sends requests to any server randomly.

💡 Hint

Think about how to make the website faster for users far away from the main server.

Geo-based load balancing directs users to the closest server geographically, reducing delay and improving user experience worldwide.