What is Amazon EC2?
Amazon EC2 stands for Amazon Elastic Compute Cloud. It is a service that provides on-demand, scalable computing capacity in the Amazon Web Services (AWS) Cloud. You can use Amazon EC2 to launch as many or as few virtual servers as you need, configure security and networking, and manage storage. You can also scale up or down your capacity depending on your workload and only pay for what you use.
How does Amazon EC2 work?
Amazon EC2 works by using the following components:
Instances: These are virtual servers that run your applications. You can choose from different types of instances that vary in CPU, memory, storage, networking, and graphics capabilities. You can also customize your instances with different operating systems and software packages.
Amazon Machine Images (AMIs): These are preconfigured templates for your instances that include the operating system and additional software. You can use AMIs provided by AWS, create your AMIs, or use AMIs shared by other users.
Key pairs: These are secure login information for your instances. AWS stores the public key and you store the private key in a secure place. You use the key pair to connect to your instance using SSH or RDP.
Security groups: These are virtual firewalls that control the incoming and outgoing traffic to your instances. You can specify which ports and protocols are allowed or denied for your instances.
Elastic IP addresses: These are static IP addresses that you can assign to your instances. They allow you to access your instances from the internet and also enable you to remap the address to another instance if the original instance fails or is stopped.
Amazon EBS volumes: These are persistent storage volumes that you can attach to your instances. They provide high performance and durability for your data. You can also create snapshots of your volumes for backup or replication purposes.
Regions and Availability Zones: These are physical locations where AWS operates its data centres. Each region consists of multiple isolated Availability Zones that are connected by low-latency networks. You can choose which region and Availability Zone to launch your instances to reduce latency and increase availability.
What are the benefits of using Amazon EC2?
Amazon EC2 offers many benefits for running your applications on the cloud, such as:
Reliability: Amazon EC2 provides high availability and fault tolerance by allowing you to launch instances across multiple Availability Zones within a region. You can also use features such as Auto Scaling, Elastic Load Balancing, and Amazon CloudWatch to monitor and adjust your capacity according to demand.
Security: Amazon EC2 provides multiple layers of security for your instances and data. You can use security groups, network access control lists (ACLs), encryption, identity and access management (IAM), and firewalls to protect your resources. You can also use AWS Shield, AWS WAF, and AWS Firewall Manager to defend against common web attacks.
Performance: Amazon EC2 provides fast and consistent performance for your applications by using the latest hardware and software technologies. You can choose from different types of instances that are optimized for different workloads, such as general purpose, compute-optimized, memory-optimized, storage-optimized, accelerated computing, or bare metal instances. You can also use features such as Enhanced Networking, Elastic Fabric Adapter (EFA), Nitro System, Placement Groups, and Dedicated Hosts to improve network throughput, latency, scalability, isolation, and control.
Cost-effectiveness: Amazon EC2 allows you to pay only for the resources that you use with no upfront or long-term commitments. You can also save money by using features such as Spot Instances, Reserved Instances, Savings Plans, AWS Budgets, AWS Cost Explorer, and AWS Cost and Usage Report.
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