AWS DVA Flashcards
What is a AWS region?
Is a cluster of data centers
What are AWS security groups?
Security groups act as a firewall on EC2 instances. Regulate access to ports, authorized IP ranges, control of inbound/outbound network
Security groups can be attached to multiple instances, and is locked down to a region/VPC combination
What are the default for inbound/outbound on security groups?
Inbound is blocked by the default and outbound is enabled by default.
If you want to use credentials on a EC2 instance, how would you do it?
Assign the role IAMReadOnlyAccess to the instance
What is the best way to save money if you need the instance for a long period of time?
Reserve the instance for a long period of time, and pay less than on demand instances.
What type of instance reservation would you choose if you have software with complicated licensing model?
Dedicated hosts, where you book an entire physical server for your application
What is the difference between dedicated instances and dedicated hosts?
Dedicated instances no other customers will share your hardware, it is a single virtual machine. Dedicated hosts is an entire physical server can handle many virtual machines on it.
