Interview Q&A / AWS & Cloud
AWS & Cloud interview questions
EC2, S3, Lambda, IAM and VPC basics, with when to pick which service.
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- How many usable IP addresses does a /24 subnet in an AWS VPC have?
A /24 has 256 addresses, but AWS reserves five in every subnet, so 251 are usable. The reserved ones are the network address, VPC router, DNS, one for future use, and the broadcast address.
BeginnerQuick answer1 min read