Which of the following options are the benefits of using aws elastic load balancing (elb)?
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AWS Elastic Load Balancing allows users to route incoming traffic between multiple EC2 instances, elastic compute cloud servers, containers and IP addresses as appropriate. The distribution of traffic/workloads within a single or between multiple Availability Zones takes place automatically, allowing users to scale the compute capabilities while maintaining high availability as the application usage demand grows. When the load balancer receives a request from an end-user to access an application, it routes the traffic based on the health of the target instances. It continuously monitors the health status and user requests are always directed to healthy instances. In case an unhealthy instance is detected, the load balancer automatically routes all traffic to other healthy targets as available. The requests are routed back to the server when it returns to a healthy state. With the Elastic Load balancing capability, users configure the protocol and port of a Listener, a process that identifies connection requests between clients and the load balancer, as well as the load balancer and the instance targets. The Listener follows the predefined rules and policies to route the traffic between the client and the backend instances. These rules are evaluated based on configurable priority, conditions and actions as described on the AWS resource here. (This tutorial is part of our AWS Guide. Use the right-hand menu to navigate.) Types of Elastic Load BalancingThe ELB service started in 2009 with the software-based load balancing capability to route traffic, conduct health checks of instances and respond accordingly to maximize availability and fault tolerance of AWS-hosted apps. That load balancing service is now the Classic Load Balancer (CLB), and AWS has since added two new enhanced services to the load balancing portfolio: Application Load Balancer (ALB) and Network Load Balancer (NLB). Classic Load BalancerThe Classic Load Balancer is primarily developed to deliver balancing services for the EC2 instance network at the Level 4 of the OSI model. Most web applications use the TCP/IP protocol at the Level 4 Transport layer, while also using UDP protocol in some cases. However, AWS load balancing services currently do not support UDP. The Classic Load Balancer uses the information from the protocols and port numbers from incoming request to route the traffic to appropriate AWS EC2 instances hosting the Web application. The process is similar to traditional traffic routing for load balancing purposes using physical devices, except that the CLB performs this task efficiently and automatically within a virtual environment. Most of the Classic Load Balancing features are offered both with the Application and Network Load Balancers. These include:
Application Load BalancerThe ALB allows load balancing for HTTP/HTTPS traffic at Layer 7 of the OSI model and can route the traffic to modern application architectures that include containers, IP addresses, EC2 servers, Lambda functions and microservices. The ALB offers the following feature enhancements over the CLB:
Network Load BalancerLoad balancing with the NLB works at Layer 4, the Transport Layer. Network Load Balancer is capable of handling millions of routing requests per second between clients and target systems using IP addresses, TCP and port numbers. Although Network Load Balancer doesn’t offer Path and Host based routing, and Sticky Sessions capabilities of the Application Load Balancer, it does provide the following advantages over the AWS Classic Load Balancer:
The choice between Classic, Application and Network Load Balancer largely depends on the infrastructure environment, costs, security, and how the traffic must be handled between end-users and target groups. For most of the general use cases where the traffic is handled using IP addresses and TCP ports, CLB may be an appropriate option, especially when the route mapping between the two end-points is direct. For environments handling complex rules for traffic routing at the application level, the ALB would be an appropriate option. For workloads that require extreme performance and routing via static and elastic IP address, or when the source IP addresses must be preserved, the AWS Network Load Balancer would be the most appropriate option. Forbes: 5 Steps to Reduce and Manage Cloud CostsCost reduction is one of the main reasons for moving to the cloud. Get insight into the right steps to take for migrating workloads to the cloud and reducing costs as a result. These postings are my own and do not necessarily represent BMC's position, strategies, or opinion. See an error or have a suggestion? Please let us know by emailing . BMC Brings the A-GameBMC works with 86% of the Forbes Global 50 and customers and partners around the world to create their future. With our history of innovation, industry-leading automation,
operations, and service management solutions, combined with unmatched flexibility, we help organizations free up time and space to become an Autonomous Digital Enterprise that conquers the opportunities ahead. You may also likeAbout the author
Muhammad RazaMuhammad Raza is a Stockholm-based technology consultant working with leading startups and Fortune 500 firms on thought leadership branding projects across DevOps, Cloud, Security and IoT. Which are the benefits of using AWS Elastic Load Balancing?Elastic Load Balancing automatically distributes your incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones. It monitors the health of its registered targets, and routes traffic only to the healthy targets.
What is a benefit of using an elastic load balancer ELB with applications running in the AWS cloud?High availability
An Elastic Load Balancer is highly available. You can distribute incoming traffic across your Amazon EC2 instances in a single Availability Zone or multiple Availability Zones. An Elastic Load Balancer automatically scales its request handling capacity in response to incoming application traffic.
What is the main purpose of elastic load balancer ELB in Amazon cloud?Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances. It enables you to achieve greater levels of fault tolerance in your applications, seamlessly providing the required amount of load balancing capacity needed to distribute application traffic.
What are the key features provided by Elastic load balancer ELB )?ELB offers enhanced features including:. Detection of unhealthy Elastic Compute Cloud (EC2) instances.. Spreading instances across healthy channels only.. Flexible cipher support.. Centralized management of Secure Sockets Layer (SSL) certificates.. Optional public key authentication.. Support for both IPv4 and IPv6.. |