Kubernetes -Networking-Interview-Page-2

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Certainly, here are some Kubernetes networking-related interview questions that you might find helpful:

Basics of Kubernetes Networking:

  1. What is a Service in Kubernetes networking, and how does it work?
  2. Explain the difference between ClusterIP, NodePort, and LoadBalancer service types.
  3. How do you expose a Kubernetes application externally to the cluster?
  4. What is an Ingress resource, and how is it used for routing traffic to services?
  5. Describe the role of a kube-proxy in Kubernetes networking.

Network Policies:

  1. What is a Kubernetes Network Policy, and how does it control communication between pods?
  2. How do you define a Network Policy, and what are some use cases for using them?
  3. Explain the difference between ingress and egress network policies.

Container-to-Container Communication:

  1. How can containers within the same pod communicate with each other?
  2. Describe the localhost network namespace in Kubernetes.

DNS and Service Discovery:

  1. How does DNS resolution work for Kubernetes services?
  2. What is the default DNS name for a Kubernetes service?
  3. How can you configure a pod to use a specific DNS server or search domain?

Load Balancing:

  1. How does Kubernetes manage load balancing for services?
  2. What is the role of the "Endpoints" resource in load balancing?

Network Plugins and CNI:

  1. What is a Container Network Interface (CNI), and why is it essential for Kubernetes networking?
  2. Can you name some popular network plugins that can be used with Kubernetes, and what are their features?

Security and Network Isolation:

  1. How can you restrict communication between pods using network policies?
  2. Explain the concept of a "flat network" and its implications for Kubernetes security.

Advanced Networking Concepts:

  1. What is IPVS (IP Virtual Server), and how does it relate to Kubernetes networking?
  2. Describe the concept of "IP masquerade" in Kubernetes networking.

Troubleshooting and Diagnostics:

  1. How do you troubleshoot networking issues in Kubernetes?
  2. What commands or tools can you use to diagnose networking problems between pods?

Scaling and Networking:

  1. How does Kubernetes networking handle pod scaling and rescheduling?
  2. What considerations should be taken into account when horizontally scaling applications with regards to networking?

Remember, Kubernetes networking can be quite extensive, and the depth of questions can vary based on the role and level you're interviewing for. Make sure to tailor these questions according to the candidate's experience and the specific job requirements.

 

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