Term
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Definition
| A load balancer directs traffic |
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Term
| What are the types of load balancers? |
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Definition
1. Classic
2. Application
3. Gateway
4. Network |
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Term
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Definition
| Best used for traffic on layer 4 and 7. It uses TCP, SSL/TLS, HTTP and HTTPS protocol listeners |
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Term
| Application load balancer |
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Definition
| Flexible application management used at layer 7. HTTP, HTTPS, GRPC protocols |
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Term
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Definition
| Used for network logging and monitoring with third party virtual appliance on layer 3 as a gateway and layer 4 as a load balancer |
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Term
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Definition
| Offer extreme performance and static IP addresses at layer 4. This load balancer uses the following protocols: TLS, TCP, UDP |
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Term
| How is auto scaling different than load balancing? *know for exam* |
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Definition
| Auto Scaling improves availability by utilizing multiple AZs and can help curb costs as it can scaled down when demand subsides |
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Term
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Definition
| Automatically adds or replaces EC2 (virtual machines) across AZs (data centers) |
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Term
| What are the two types of auto scaling? |
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Definition
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Term
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Definition
| Horizontal, or out, auto scaling reduces the impact of system failure and creates high availability (it is building out more EC2s/more VMs to handle all the demand) |
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Term
| What is vertical auto scaling? |
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Definition
| Vertical, or up, auto scaling adds more computing power to make the VM "bigger" |
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Term
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Definition
| Helps to right-size services like compute (i.e., lambda) |
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Term
| What are some ways to connect to a Linux EC2 instance? |
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Definition
| Instance Connect, SSH, and Systems Manager (these are AWS services available in the console) |
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Term
| Why do you have to select the OS when launching an EC2 instance? |
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Definition
| When launching an Amazon EC2 instance, you choose the operating system (OS) because it determines the software environment in which your instance runs |
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Term
| How do you launch an EC2 instance? |
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Definition
Launch: You create an instance using the AWS Management Console or other methods.
Operating System: You choose a Linux distribution (such as Amazon Linux, Ubuntu, or CentOS) for your instance.
Configuration: You set up the instance with the desired resources (CPU, memory, storage).
Applications: You install and run software on the instance.
Connectivity: You can connect to the instance via SSH, EC2 serial console, or Session Manager. |
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