CLF-C02 Networking 3 — Questions and Answers
Question 1: Which AWS service provides a global content delivery network (CDN) that caches content at edge locations worldwide?
- AWS Global Accelerator
- Amazon CloudFront (Correct answer)
- AWS Direct Connect
- Amazon Route 53
Correct answer: Amazon CloudFront
Amazon CloudFront is a CDN service that delivers content through a worldwide network of edge locations, reducing latency for end users.
Question 2: A company wants to improve the availability and performance of their global application by routing users to the nearest healthy AWS endpoint. Which service uses the AWS global network backbone for this?
- Amazon CloudFront
- Amazon Route 53
- AWS Global Accelerator (Correct answer)
- AWS Transit Gateway
Correct answer: AWS Global Accelerator
AWS Global Accelerator uses the AWS global network to optimize the path to your application, improving performance and availability by routing traffic through the nearest AWS edge location.
Question 3: What type of endpoint does AWS PrivateLink provide to access AWS services without traversing the public internet?
- Internet Gateway endpoint
- VPC Endpoint (Correct answer)
- Direct Connect endpoint
- Transit endpoint
Correct answer: VPC Endpoint
AWS PrivateLink uses VPC Endpoints (Interface Endpoints) to enable private connectivity to AWS services directly from your VPC without using internet gateways or NAT devices.
Question 4: Which Route 53 routing policy would you use to route traffic to the endpoint that has the lowest latency for the user?
- Simple routing
- Weighted routing
- Latency-based routing (Correct answer)
- Geolocation routing
Correct answer: Latency-based routing
Latency-based routing in Route 53 directs traffic to the AWS region that provides the lowest latency for the end user based on actual measured latency.
Question 5: An application team needs to distribute incoming HTTP traffic across multiple EC2 instances based on URL path patterns. Which AWS service best fits this need?
- Network Load Balancer
- Classic Load Balancer
- Application Load Balancer (Correct answer)
- Gateway Load Balancer
Correct answer: Application Load Balancer
Application Load Balancer (ALB) operates at Layer 7 and supports content-based routing, allowing traffic distribution based on URL paths, hostnames, and HTTP headers.
Question 6: What is the main purpose of an Internet Gateway in a VPC?
- To connect two VPCs together
- To provide a target in VPC route tables for internet-routable traffic (Correct answer)
- To filter malicious internet traffic
- To cache frequently accessed content
Correct answer: To provide a target in VPC route tables for internet-routable traffic
An Internet Gateway serves as a horizontally scaled, redundant VPC component that provides a target in route tables for internet-bound traffic and performs NAT for instances with public IPs.
Question 7: A company wants to resolve domain names for resources within their VPC using a private DNS namespace not accessible from the internet. Which service enables this?
- Amazon Route 53 Public Hosted Zone
- Amazon Route 53 Private Hosted Zone (Correct answer)
- AWS Global Accelerator
- Amazon CloudFront
Correct answer: Amazon Route 53 Private Hosted Zone
Amazon Route 53 Private Hosted Zones allow DNS resolution for domain names within one or more VPCs without exposing that DNS information publicly.
CLF-C02 Networking 3
Which AWS service provides a global content delivery network (CDN) that caches content at edge locations worldwide?