CKA Service Mesh Basics

Question 1

What is a Kubernetes Service?

Accepted Answer

An abstraction providing stable networking for a set of Pods

Answer

A Service provides a stable IP address and DNS name for accessing a set of Pods, with built-in load balancing regardless of Pod lifecycle changes.

Question 2

What is the difference between ClusterIP and NodePort services?

Accepted Answer

ClusterIP is internal only; NodePort exposes the service on each node's IP

Answer

ClusterIP services are only accessible within the cluster, while NodePort services expose a port on every node's IP address, making the service accessible externally.

Question 3

What is an Ingress in Kubernetes?

Accepted Answer

An API object that manages external access to services, typically HTTP

Answer

Ingress defines rules for routing external HTTP/HTTPS traffic to internal services, providing features like SSL termination, path-based routing, and virtual hosting.

Question 4

What is DNS resolution used for in Kubernetes?

Accepted Answer

To resolve Service names to IP addresses within the cluster

Answer

Kubernetes provides internal DNS that automatically resolves Service names to their ClusterIP addresses, enabling Pods to communicate using names instead of IPs.

Question 5

What is a LoadBalancer service type?

Accepted Answer

A service that provisions an external load balancer in cloud environments

Answer

LoadBalancer service type automatically provisions a cloud provider's load balancer, providing an external IP address for accessing the service from outside the cluster.

(CKA) Certified Kubernetes Associate Practice Test

(CKA) Certified Kubernetes Associate Practice Test

CKA Service Mesh Basics