Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform, offering over 200 fully-featured services from data centers globally. Millions of customers—including the fastest-growing startups, largest enterprises, and leading government agencies—are using AWS to lower costs, become more agile, and innovate faster.
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What is VPC peering?
Amazon Virtual Private Cloud (Amazon VPC) enables you to launch AWS resources into a virtual network that you've defined.
A VPC peering connection is a networking connection between two VPCs that enables you to route traffic between them using private IPv4 addresses or IPv6 addresses. Instances in either VPC can communicate with each other as if they are within the same network. You can create a VPC peering connection between your own VPCs, or with a VPC in another AWS account. The VPCs can be in different regions (also known as an inter-region VPC peering connection).
AWS uses the existing infrastructure of a VPC to create a VPC peering connection; it is neither a gateway nor a VPN connection and does not rely on a separate piece of physical hardware. There is no single point of failure for communication or a bandwidth bottleneck.
A VPC peering connection helps you to facilitate the transfer of data. For example, if you have more than one AWS account, you can peer the VPCs across those accounts to create a file-sharing network. You can also use a VPC peering connection to allow other VPCs to access resources you have in one of your VPCs.
You can establish peering relationships between VPCs across different AWS Regions (also called inter-Region VPC peering). This allows VPC resources including EC2 instances, Amazon RDS databases, and Lambda functions that run in different AWS Regions to communicate with each other using private IP addresses, without requiring gateways, VPN connections, or separate network appliances. The traffic remains in the private IP space. All inter-region traffic is encrypted with no single point of failure, or bandwidth bottleneck. Traffic always stays on the global AWS backbone, and never traverses the public internet, which reduces threats, such as common exploits, and DDoS attacks. Inter-Region VPC Peering provides a simple and cost-effective way to share resources between regions or replicate data for geographic redundancy.
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AWS Certified Cloud Practitioner
Introduction
The AWS Certified Cloud Practitioner (CLF-C01) exam is intended for individuals who can effectively
demonstrate an overall knowledge of the AWS Cloud independent of a specific job role.
The exam validates a candidate’s ability to complete the following tasks:
Explain the value of the AWS Cloud
Understand and explain the AWS shared responsibility model
Understand security best practices
Understand AWS Cloud costs, economics, and billing practices
Describe and position the core AWS services, including compute, network, databases, and
storage
Identify AWS services for common use cases
Target candidate description
The target candidate should have 6 months, or the equivalent, of active engagement with the AWS Cloud,
with exposure to AWS Cloud design, implementation, and/or operations. Candidates will demonstrate an
understanding of well-designed AWS Cloud solutions.
Recommended AWS knowledge
The target candidate should have the following knowledge:
AWS Cloud concepts
Security and compliance within the AWS Cloud
Understanding of the core AWS services
Understanding the economics of the AWS Cloud
What is considered out of scope for the target candidate?
The following is a non-exhaustive list of related job tasks that the target candidate is not expected to be
able to perform. These items are considered out of scope for the exam:
Coding
Designing cloud architecture
Troubleshooting
Implementation
Migration
Load and performance testing
Business applications (for example, Amazon Alexa, Amazon Chime, Amazon WorkMail)
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Read more: AWS Certified Cloud Practitioner (CLF-C01) Exam Guide
Amazon Web Services
Amazon Web Services, Inc. (AWS) is a subsidiary of Amazon that provides on-demand cloud computing platforms and APIs to individuals, companies, and governments, on a metered pay-as-you-go basis. These cloud computing web services provide distributed computing processing capacity and software tools via AWS server farms. One of these services is Amazon Elastic Compute Cloud (EC2), which allows users to have at their disposal a virtual cluster of computers, available all the time, through the Internet. AWS's virtual computers emulate most of the attributes of a real computer, including hardware central processing units (CPUs) and graphics processing units (GPUs) for processing; local/RAM memory; hard-disk/SSD storage; a choice of operating systems; networking; and pre-loaded application software such as web servers, databases, and customer relationship management (CRM).
AWS services are delivered to customers via a network of AWS server farms located throughout the world. Fees are based on a combination of usage (known as a "Pay-as-you-go" model), hardware, operating system, software, or networking features chosen by the subscriber required availability, redundancy, security, and service options. Subscribers can pay for a single virtual AWS computer, a dedicated physical computer, or clusters of either. Amazon provides select portions of security for subscribers (e.g. physical security of the data centers) while other aspects of security are the responsibility of the subscriber (e.g. account management, vulnerability scanning, patching). AWS operates from many global geographical regions including 6 in North America.
Amazon markets AWS to subscribers as a way of obtaining large-scale computing capacity more quickly and cheaply than building an actual physical server farm. All services are billed based on usage, but each service measures usage in varying ways. As of 2017, AWS owns 33% of all cloud (IaaS, PaaS) while the next two competitors Microsoft Azure and Google Cloud have 18%, and 9% respectively, according to Synergy Group.
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