All 97 questions

  1. What is the difference between an Application Load Balancer, a Network Load Balancer, and a Classic Load Balancer?

    Asked in 2 of 337 interviews · last asked Aug 31 · Concept · Mid-level

    Other ways it was asked
    • “What is the difference between an Application Load Balancer and a Network Load Balancer?”

  2. How would you troubleshoot a Kubernetes Service that is not routing traffic to the correct pods?

    Asked in 2 of 337 interviews · last asked Sep 4 · Scenario · Mid-level

    Other ways it was asked
    • “How do you debug a Kubernetes Service that is not reaching the correct pods?”

  3. What is a load balancer?

    Asked in 2 of 337 interviews · last asked Feb 22 · Concept · Junior

  4. Why might a secondary AWS Direct Connect link come up briefly and then go down?

    Asked once · last asked Mar 11 · Scenario · Senior

    Other ways it was asked
    • “How would you troubleshoot and prevent a secondary AWS Direct Connect link from repeatedly coming up and going down?”

  5. Given a data center network to design, would you use iBGP or eBGP, and what are the reasons and benefits of your choice?

    Asked once · last asked Apr 7 · Design · Senior

    Other ways it was asked
    • “For a data center network design, would you recommend iBGP or eBGP, and why?”

  6. How can a container on a Docker bridge network reach the host?

    Asked once · last asked Jul 16 · Concept · Junior

    Other ways it was asked
    • “How can a container on a Docker bridge network communicate with the host?”

  7. What is the difference between Azure Traffic Manager and a load balancer?

    Asked once · last asked Feb 9 · Concept · Mid-level

  8. Can you explain the different Docker network types and what each one is used for?

    Asked once · last asked Feb 18 · Concept · Mid-level

    Other ways it was asked
    • “How do the Docker network types differ, and how does communication work between the host and a container?”

  9. What is VXLAN, and when would you use it?

    Asked once · last asked Feb 19 · Concept · Mid-level

  10. When might static routing be used with VXLAN instead of dynamic routing, and how would you evaluate whether it is the right design?

    Asked once · last asked Feb 19 · Scenario · Senior

  11. How do you decide which load-balancing method best fits a specific application?

    Asked once · last asked Feb 25 · Scenario · Senior

    Other ways it was asked
    • “When you've implemented load balancing, how do you decide which load-balancing method best fits a specific application?”

  12. How would you investigate and handle a load-balancer spike?

    Asked once · last asked Mar 3 · Scenario · Mid-level

  13. What are Layer 7 load balancers, and how do you use them?

    Asked once · last asked Mar 9 · Concept · Mid-level

  14. How would you implement Layer 7 load balancing in Azure?

    Asked once · last asked Mar 9 · Scenario · Mid-level

  15. How would you design end-to-end connectivity between a VPC and an on-premises network using BGP?

    Asked once · last asked Mar 11 · Design · Senior

  16. What connectivity would you propose for five VNets that need low-latency, high-throughput connections to on-premises, with no encryption requirement?

    Asked once · last asked Mar 11 · Design · Senior

  17. Where would ExpressRoute terminate in Azure, and what configuration element would you need?

    Asked once · last asked Mar 11 · Concept · Mid-level

  18. What are the benefits of using a hub in Azure when connecting multiple VNets?

    Asked once · last asked Mar 11 · Concept · Mid-level

  19. What is ExpressRoute Global Reach, and what does it do?

    Asked once · last asked Mar 11 · Concept · Mid-level

  20. How would you connect resources in an Azure resource group to an on-premises site?

    Asked once · last asked Mar 19 · Scenario · Mid-level

  21. How would you manage an MDS switch in a Fibre Channel environment?

    Asked once · last asked Mar 19 · Tooling · Mid-level

  22. What are the differences between InfiniBand and RoCE for networking AI TPUs?

    Asked once · last asked Mar 26 · Concept · Senior

  23. What is the main difference between a traditional data center model and ACI?

    Asked once · last asked Apr 7 · Concept · Mid-level

  24. What steps would you take to connect an on-premises router to AWS or Azure?

    Asked once · last asked Apr 7 · Scenario · Senior

  25. How would you manage network integration between VMware ESXi hosts and vCenter?

    Asked once · last asked Apr 13 · Scenario · Mid-level

  26. Can you walk me through the workflow for a request to an API hosted on AKS, especially the components it passes through inside AKS before reaching the pod?

    Asked once · last asked Apr 14 · Design · Mid-level

    Other ways it was asked
    • “What components does an API request pass through inside AKS before reaching a pod?”

  27. If a private AKS cluster is configured correctly but fails to start during creation, what network-level configuration might be needed?

    Asked once · last asked Apr 14 · Scenario · Senior

  28. In AWS, how would you design a multi-account networking model that allows egress and centralized inspection while keeping workloads isolated? What services and routing constructs would you use?

    Asked once · last asked Apr 17 · Design · Senior

  29. How would you add an endpoint group to a static port in Cisco ACI using the APIC GUI?

    Asked once · last asked Apr 23 · Tooling · Mid-level

  30. How do you manage Cisco Nexus 9000 and 7000 switches using NX-OS, ACI, or DCI?

    Asked once · last asked Apr 24 · Tooling · Mid-level

  31. What is the function of a data center POP or Meet-Me Room, and how does it connect hosted customer infrastructure to a carrier or telco?

    Asked once · last asked May 7 · Concept · Mid-level

    Other ways it was asked
    • “Why are POPs or Meet-Me Rooms important to data center customers?”

  32. What are cloud on-ramps for hyperscalers such as Microsoft and AWS, and how are they used?

    Asked once · last asked May 7 · Concept · Mid-level

  33. What other networks, such as subnets, must you plan for in a Kubernetes cluster?

    Asked once · last asked May 12 · Concept · Mid-level

  34. What is the difference between ClusterIP and NodePort in Kubernetes, and why would you choose NodePort over ClusterIP?

    Asked once · last asked May 12 · Concept · Mid-level

  35. What port range is available for Kubernetes NodePort services? Can NodePort use ports 0–62,000, or is there a limit?

    Asked once · last asked May 12 · Concept · Mid-level

  36. For a hybrid environment, what prerequisites are needed for communication between the on-premises and cloud environments?

    Asked once · last asked May 18 · Concept · Mid-level

  37. How would you keep client connections and subscriptions working when traffic fails over to another region?

    Asked once · last asked May 23 · Design · Senior

  38. How would you structure more than 50 production workloads across AWS accounts, VPCs, and environments?

    Asked once · last asked Jun 11 · Design · Senior

  39. Could you walk me through these VPC networking elements: public and private subnets, route tables, NAT gateways, internet gateways, and security groups?

    Asked once · last asked Jun 11 · Concept · Mid-level

  40. What is the difference between ClusterIP, NodePort, LoadBalancer, Route, and Ingress?

    Asked once · last asked Jul 16 · Concept · Mid-level

  41. How would you design an EVPN-VXLAN network?

    Asked once · last asked Jul 16 · Design · Senior

  42. How would you design or deploy a data center network fabric?

    Asked once · last asked Jul 21 · Design · Senior

  43. What are common data center switching fabric architectures, and how do they differ?

    Asked once · last asked Jul 21 · Concept · Senior

  44. What data plane technology does Cisco ACI use in its leaf-spine architecture?

    Asked once · last asked Jul 21 · Concept · Senior

    Other ways it was asked
    • “What was the data plane technology for the Cisco ACI leaf-spine architecture?”

  45. If you were designing a data center today, what would you use for the control plane and data plane?

    Asked once · last asked Jul 21 · Design · Senior

  46. How do you orchestrate a data center network fabric in a Cisco ACI environment?

    Asked once · last asked Jul 21 · Tooling · Senior

  47. What is the difference between Layer 4 and Layer 7 routing?

    Asked once · last asked Jul 27 · Concept · Mid-level

  48. Your application is deployed in a Kubernetes cluster, and the database runs inside the cluster. How does communication between them work?

    Asked once · last asked Aug 4 · Concept · Junior

  49. How can you make a deployed Kubernetes application accessible over the Internet?

    Asked once · last asked Aug 7 · Concept · Mid-level

  50. How would you create an Azure virtual machine without a public IP address?

    Asked once · last asked Aug 10 · Tooling · Mid-level

  51. What is peering in Azure?

    Asked once · last asked Aug 10 · Concept · Mid-level

  52. How would you use iSCSI to extend storage from a NAS device to an HP server?

    Asked once · last asked Aug 18 · Scenario · Mid-level

  53. Can you evaluate OSPF versus BGP for a leaf-and-spine data center design and defend your recommendation?

    Asked once · last asked Aug 19 · Design · Senior

  54. How would you design complete isolation between two business units in AWS, each with multiple VPCs connected to on-prem SD-WAN?

    Asked once · last asked Aug 19 · Design · Senior

  55. How would you position a network fabric solution to a lead network architect facing routing and scalability limits with traditional VPNs across AWS, Azure, and on-premises environments?

    Asked once · last asked Aug 19 · Case · Senior

  56. What is the difference between a VM network adapter and a VMkernel adapter?

    Asked once · last asked Aug 21 · Concept · Mid-level

  57. How can you tag VLANs on the VMware side?

    Asked once · last asked Aug 21 · Tooling · Mid-level

  58. What are Network Connectivity Center (NCC), NCC hubs, Private Service Connect (PSC), and global versus non-global VPCs in Google Cloud?

    Asked once · last asked Aug 26 · Concept · Senior

  59. How would you approach architecture and design for enterprise data center and multicloud connectivity projects?

    Asked once · last asked Aug 26 · Design · Senior

  60. What needs to be deployed or configured before you clone an Akamai template configuration into 100 application configurations?

    Asked once · last asked Aug 26 · Tooling · Senior

  61. What is the first step in configuring a cloned Akamai property to handle specific hostnames or URLs?

    Asked once · last asked Aug 26 · Tooling · Mid-level

  62. When routing traffic through Akamai, what behavior should you configure in the default rule?

    Asked once · last asked Aug 26 · Tooling · Mid-level

  63. An AWS Application Load Balancer reports that requests are reaching a target, but customers receive fatal errors. Where would you investigate?

    Asked once · last asked Aug 30 · Scenario · Mid-level

  64. How would you connect EC2 instances in two AWS accounts and enable them to exchange data?

    Asked once · last asked Aug 31 · Scenario · Senior

  65. Will a Network Load Balancer forward an HTTP request to an EC2 instance behind it?

    Asked once · last asked Aug 31 · Concept · Mid-level

  66. How would you make a Dockerized Python application available externally over a network?

    Asked once · last asked Aug 31 · Scenario · Mid-level

  67. How do two different containers running in a single pod, sharing the same IP address, communicate with each other?

    Asked once · last asked Sep 4 · Concept · Mid-level

  68. What network communication does kube-proxy provide in a Kubernetes cluster, and why is it needed?

    Asked once · last asked Sep 4 · Concept · Mid-level

  69. What is the Kubernetes Service network, and how does it work?

    Asked once · last asked Sep 4 · Concept · Mid-level

  70. How does kube-proxy route traffic to Kubernetes Services, and which backends can it use?

    Asked once · last asked Sep 4 · Concept · Senior

    Other ways it was asked
    • “How does kube-proxy connect Kubernetes networks, and which backends can it use?”

  71. How would you route traffic to a new load balancer during a deployment?

    Asked once · last asked Sep 10 · Scenario · Senior

  72. How would you integrate Oracle Exadata on OCI with AWS to create a multi-cloud environment?

    Asked once · last asked Sep 10 · Design · Senior

  73. What is Azure's hub-and-spoke networking model, and what similar models are available in AWS or GCP?

    Asked once · last asked Sep 10 · Concept · Senior

  74. How would you route traffic from a frontend to an API gateway, and when would you put a load balancer in between?

    Asked once · last asked Sep 21 · Design · Mid-level

  75. How do VPCs, subnets, security groups, NACLs, NAT gateways, route tables, VPC peering, and transit gateways work together in an AWS environment?

    Asked once · last asked Sep 25 · Concept · Senior

    Other ways it was asked
    • “Can you talk about the networking components in your environment, including VPCs, subnets, security groups, NACLs, NAT gateways, route tables, VPC peering, and transit gateways?”

  76. An endpoint is learned on leaf101, contracts are configured correctly, and routes are present in the tenant VRF, but traffic between two EPGs fails intermittently. How would you troubleshoot it?

    Asked once · last asked Sep 25 · Scenario · Senior

  77. If APIC shows an endpoint as learned but traffic is still being dropped, how would you determine whether the cause is contract policy or hardware forwarding?

    Asked once · last asked Sep 25 · Scenario · Senior

  78. ACI learns endpoint 10.10.10.100 on leaf202, but its server connects physically to leaf101; the interface is up, VLAN correct, and no faults reported, yet traffic fails intermittently. What are your top five hypotheses, which commands would you run, and how would you isolate the cause?

    Asked once · last asked Sep 25 · Scenario · Senior

    Other ways it was asked
    • “ACI shows endpoint 10.10.10.100 learned on leaf202, but the server is physically connected to leaf101. The interface is up, the VLAN is correct, and there are no faults. Traffic is intermittently failing. Walk me through your top five hypotheses, the commands you would run, and how you would isolate the root cause.”

  79. When troubleshooting an ACI endpoint learned on the wrong leaf, what would you look for in its endpoint history?

    Asked once · last asked Sep 25 · Scenario · Senior

  80. Explain the Kubernetes request flow from a user's device to the application.

    Asked once · last asked Sep 29 · Concept · Mid-level

  81. Suppose you have an EC2 instance running an application on port 8080. The instance is up, and CPU and memory look normal, but users can't access it via the browser. How would you troubleshoot this using the AWS management console?

    Asked once · last asked Oct 11 · Scenario · Mid-level

  82. How do you load-balance traffic across multiple production front-end instances?

    Asked once · last asked Oct 13 · Design · Mid-level

  83. What AWS networking configuration is needed for a Lambda function to connect to a private EC2 instance?

    Asked once · last asked Oct 15 · Concept · Mid-level

  84. What component does Kubernetes need to provide networking?

    Asked once · last asked May 12 · Concept · Mid-level

    Other ways it was asked
    • “What does Kubernetes need to provide networking to pods?”

  85. How would you describe Microsoft’s ExpressRoute offering?

    Asked once · last asked Mar 11 · Concept · Junior

  86. What type of network do you configure in Kubernetes?

    Asked once · last asked May 12 · Concept · Mid-level

  87. In Cisco ACI, how many bridge domains can be attached to an EPG?

    Asked once · last asked Jun 11 · Concept · Mid-level

  88. What is a bridge network in Docker?

    Asked once · last asked Jul 16 · Concept · Junior

  89. What do east-west and north-south traffic mean in a network?

    Asked once · last asked Jul 16 · Concept · Mid-level

  90. How does a laptop at home connect to a web application hosted in AWS?

    Asked once · last asked Aug 17 · Concept · Mid-level

  91. What is a VPC, and what is an AWS Transit Gateway?

    Asked once · last asked Aug 19 · Concept · Junior

  92. What is VMware NSX, and what does it do?

    Asked once · last asked Aug 21 · Concept · Mid-level

  93. What networks are used in a Kubernetes cluster, and what is each one for?

    Asked once · last asked Sep 4 · Concept · Mid-level

    Other ways it was asked
    • “What other networks, besides the Service and Pod networks, are part of a basic Kubernetes architecture, and what are they used for?”

  94. How would you describe an Azure tenant's high-level architecture, including its traffic flows and entry points?

    Asked once · last asked Sep 22 · Design · Senior

  95. How would you configure load balancing for a production application?

    Asked once · last asked Oct 13 · Design · Mid-level

  96. What pipelines and network connectivity options are available in Azure?

    Asked once · last asked Jan 8 · Concept · Mid-level

  97. What is a VPC, and what are its components?

    Asked once · last asked Jan 24 · Concept · Junior

    Other ways it was asked
    • “What is the purpose of a VPC?”

More Computer Networks interview questions

How this list is made

Every question here was asked by a real interviewer in a real job interview that a candidate ran MeetAssist in. After the call, the interviewer's questions are pulled from the transcript. Practice sessions, tests, exams and anything that was not a job interview are dropped.

Questions are rewritten so they make sense on their own: names of people, employers and clients are removed, and speech-to-text mistakes are fixed. Small talk, logistics and questions about one candidate's own résumé are left out. Rephrasings of the same question are merged, and the count is the number of different interviews it came up in.

The interviews come from candidates who use MeetAssist, so they lean towards software, data and AI roles: the shares describe these interviews, not every Computer Networks interview. Answers to the most asked questions are written and checked by an editor; a "common mistake" is shown only when reviews of real answers in these interviews show it, with the count.

337 interviews, 208 candidates, Nov 2025 to Oct 2026. Updated every month with new interviews.