It Infrastructure Interview Questions

421 it infrastructure interview questions shared by candidates

What would you change to optimize spanning tree in a L2 environment? (priorities for root) Where would you configure spanning-tree root guard? (uplinks) What two additional features can be used for spanning tree optimization? (bpduguard, bpdufilter, port-fast, etc) What features could you implement for fiber problems resulting in a unidirectional link? (UDLD & spanning tree loop guard) Name the OSPF LSA types and describe each. (google) Why would the type 4 ASBR summary be used? (E1 routes with multiple points of redistribution to area 0 for competing routes to the same external route) What is BGP's loop prevention mechanism? (AS_PATH attribute) Why did you implement OSPF and not EIGRP in your network?
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IT Infrastructure Engineer

Interviewed at Red Ventures

3.2
Jul 1, 2013

What would you change to optimize spanning tree in a L2 environment? (priorities for root) Where would you configure spanning-tree root guard? (uplinks) What two additional features can be used for spanning tree optimization? (bpduguard, bpdufilter, port-fast, etc) What features could you implement for fiber problems resulting in a unidirectional link? (UDLD & spanning tree loop guard) Name the OSPF LSA types and describe each. (google) Why would the type 4 ASBR summary be used? (E1 routes with multiple points of redistribution to area 0 for competing routes to the same external route) What is BGP's loop prevention mechanism? (AS_PATH attribute) Why did you implement OSPF and not EIGRP in your network?

BGP troubleshooting, juniper routers, vxlan, Prisma Access, VMWare, Linux, Kubernetes architecture, packet capture, network monitoring, latency measurement, datacenter architecture, firewalls, wireshark, end user support
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Manager, Global IT Infrastructure

Interviewed at Polar Asset Management Partners

1.4
Jul 22, 2025

BGP troubleshooting, juniper routers, vxlan, Prisma Access, VMWare, Linux, Kubernetes architecture, packet capture, network monitoring, latency measurement, datacenter architecture, firewalls, wireshark, end user support

The questioning was technically unspecific, which is why they had the idea to have a follow-up call, which which ended up never happening due to their own laziness. In the panel interview, the hiring manager apologized at least five times saying sorry, he was unprepared. Really? You're unprepared to interview someone a week out from scheduling? Someone who took the time to be present for the interview YOU scheduled? How utterly unprofessional.
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IT Infrastructure Systems Administrator II

Interviewed at Battelle

3.6
Dec 7, 2018

The questioning was technically unspecific, which is why they had the idea to have a follow-up call, which which ended up never happening due to their own laziness. In the panel interview, the hiring manager apologized at least five times saying sorry, he was unprepared. Really? You're unprepared to interview someone a week out from scheduling? Someone who took the time to be present for the interview YOU scheduled? How utterly unprofessional.

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