Network – A Tech Ref

Intro to NACL and Security Groups

A Network Access Control List (NACL) is a security feature in Amazon Web Services (AWS) that acts as a virtual firewall for controlling inbound and outbound traffic at the subnet level within a Virtual Private Cloud (VPC). NACLs are stateless, meaning they don’t keep track of the connection state like stateful firewalls do. They evaluate traffic based on rules that you define and allow or deny traffic accordingly.

Network Access Control Lists (NACLs) and Security Groups are both important components of network security in Amazon Web Services (AWS). They provide different levels of control and operate at different layers of the networking stack.

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Introduction to AWS Monitoring

AWS monitoring services are essential for maintaining the performance, availability, security, and cost-effectiveness of your AWS infrastructure. They provide real-time insights, automate monitoring and alerting, assist in troubleshooting, and enable proactive management of your resources, leading to optimized operations and improved customer experiences.

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Intro to VPC Peering

AWS VPC Peering is a service provided by Amazon Web Services (AWS) that allows customers to create peering connections between their Virtual Private Clouds (VPCs). It enables direct communication between VPCs in the same AWS account or in different AWS accounts within the same region.

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Intro to VPC Internet Gateway

A Virtual Private Cloud (VPC) Internet Gateway (IGW) is a horizontally scaled, highly available AWS-managed component that allows communication between resources in your VPC and the internet. It serves as a connection point and facilitates the exchange of traffic between your VPC and the public internet.

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Indepth look into ELB types

Amazon Web Services (AWS) Elastic Load Balancer (ELB) is a fully-managed load balancing service that can distribute traffic across multiple compute resources to improve application availability, scalability, and performance. There are four types of ELB provided by AWS:

Classic Load Balancer (CLB)
Application Load Balancer (ALB)
Network Load Balancer (NLB)
Gateway Load Balancer (GLB)

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Route 53 Routing Policy

Routing policy is a set of rules used by domain name system (DNS) services, such as AWS Route 53, to route traffic to an application’s endpoints. It helps control how DNS service responds to DNS queries, based on factors such as the geographic location of the user, the health of resources, or the latency of the network.

Route 53 supports several routing policies, including simple routing policy, weighted routing policy, latency-based routing policy, geolocation routing policy, failover routing policy, and multi-value answer routing policy. By applying routing policies, users can optimize the performance, availability, and cost-effectiveness of their applications by directing traffic to the most appropriate resources.

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Intro to AWS Route 53

Route 53 is a highly scalable and reliable domain name system (DNS) service offered by Amazon Web Services (AWS) that translates domain names into IP addresses to locate resources on the internet. It offers several features such as integration with other AWS services, a global network of DNS servers, DNS traffic flow management, routing policies, health checks, and DNSSEC.

These features enable users to manage their domain names and routing traffic globally, improve application performance and availability, and provide cryptographic authentication and integrity for DNS data. Overall, Route 53 is a comprehensive and popular choice for managing domain names and routing traffic within the AWS environment.

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Intro to AWS Elastic Load Balancing

AWS Application Load Balancer (ALB) is a service that provides advanced load balancing capabilities for HTTP and HTTPS traffic at the application layer (Layer 7) of the OSI model. ALB routes incoming traffic to different targets, such as Amazon EC2 instances, ECS tasks, or Lambda functions, based on rules that you define.

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Intro to EC2

Amazon Elastic Compute Cloud (EC2) is a web service provided by Amazon Web Services (AWS) that enables users to provision and manage virtual machines (VMs) in the cloud. It provides scalable computing capacity in the cloud, allowing users to quickly and easily launch virtual machines with a variety of operating systems and software configurations.

With EC2, users can choose from a wide range of instance types optimized for different types of workloads, including general-purpose, compute-optimized, memory-optimized, and storage-optimized instances. EC2 also provides several features and capabilities, including the ability to configure security groups and network settings, attach storage volumes, and scale up or down as needed.