Guidepoint Network Engineer interview questions

First round is 30min HR round, where they ask about your experience and visa details. The only technical question - What is Azure VNET and subnet. They asked about salary expectations and relocation. 2nd round: 1. What is Azure load balancer, what is application gateway. - Give brief answers 2. You have a client who calls you since he's not able to connect to internet, what'd you do. - Check if you are able to reach any other websites. (He said no) - Check if internet/wifi icon is connected.(He said yes) - Any org level firewall blocking traffic.(No) - Check if you can ping google.com and 8.8.8.8(No) - nslookup google.com and check if it resolves to ip address(No) - Check if you've configured correct DNS server. If it's a private DNS server then you should have reachability from laptop (He said the DNS server is correct, it's 8.8.8.8) - Could be issue with the ISP. (He said yes, how will you determine who the ISP is). Check the router in the room, it'd have the company name. Reset the router first, if it doesn't help, contact the ISP technician for any outages or support 3rd round: 1. When do you use load balancer vs traffic manager 2. Explain DNS process in detail 3. Types of DNS in Azure 4. What is Azure front door 4th round: 1. Types of load balancers in Azure - Load balancer, Traffic Manager, App gateway, Az front door 2. Can you have VMs from different regions behind Load balancer - No (I said yes) 3. Can you have any other port number apart from 80/443 for application gateway -No (I said yes) 4. VNET1(Region A) --> VNET2(Region A) --> VNET3(Region B) --> VNET4(Region B). Can VMs in vnet1 communicate with VMs in region B. - Create VNET peering between VNET1 - VNET2 and VNET3- VNET4. Add VPN gateway in VNET3 and VNET4, create S2S and configure allow gateway transit on VNET peering setting on VNET2&3, configure "Use remote gateway" on VNET1&4 5. How do you connect VNET to PaaS - I told and explained about Private endpoint, but they wanted to know about VNET integration. 6. How does DNS work for private endpoint. - When you create a private endpoint, a NIC is created and Azure DNS zone is created that points the NIC's private IP to domain name ending with x.x.azureprivateendpoint.