A-Z Popular Blog Infrastructure Search »
Information Technology


It Management

Systems Technology

Information Security

Technology Management


Technology Culture

Artificial Intelligence

Low Technology

21 Examples of Load Balancing

Load balancing is a class of tools for distributing workloads across multiple computing resources. This is a basic element of infrastructure that allows computing services to be scaled. The following are examples of load balancer functionality.

Workload Distribution

Distribution of workloads to resources such as services, servers or platforms. This is the core functionality provided by a load balancer and has several common variations:
Distributing requests based on the requested hostname.
Using the entire URL to distribute requests as opposed to just the hostname.
Inspecting the message content of a request. This allows distribution based on content such as the value of a parameter.


Generally speaking, load balancers operate at one of two levels:
Load balancing that works at the networking transport layer, also known as layer 4. This performs routing based on networking information such as IP addresses and is not able to perform content-based routing. These are often dedicated hardware devices that can operate at high speed.
Load balancing that operates at the application layer, also known as layer 7. These can read requests in their entirety and perform content-based routing. This allows the management of load based on a full understanding of traffic.

Scheduling Algorithms

Load balancers may support multiple algorithms for distributing load. For example:
Round Robin
Routing to a pool of servers in a rotating sequential manner.
Weighted Round Robin
Assigning a weight to each server and routing more often to heavy servers and less often to light servers in a rotating sequential manner.
Least Connection
Routing the current request to the server that currently has the least active sessions.
Weighted Least Connection
Defining the capacity of each server as a weight and routing to the server that currently has the least active sessions in comparison to its capacity.
Adaptive Load Balancing
Obtaining feedback from servers to determine their actual load and routing requests to the least busy server.
Chained Failover
A fixed sequence of servers whereby the request is always routed to the first server in the chain if it is not busy. If the first server is busy, the request is routed to the second in the chain and so on.
Response Time
Routing to the server that is responding the fastest recently.
Software Defined
The ability to customize the load balancing algorithm to build in intelligence. This can be implemented at either the layer 4 or layer 7 level with intelligence about your network or application respectively.


Starting up and shutting down resources in response to demand conditions. For example, a cloud load balancer that starts new computing instances in response to peak traffic and releases the instances when traffic subsides.

Health Check

The ability to determine if a resource is down or performing poorly in order to remove the resource from the load balancing pool. This process is also known as failover. Health checks may also perform notifications and autoscaling.

Sticky Session

The ability to assign the same user or device to the same resource in order to maintain session state on the resource.

Persistent Connections

Allowing a server to open a persistent connection with a client such as a WebSocket.


Presenting certificates to a client and authentication of client certificates.


Handling encrypted connections such as TLS and SSL.

Server Name Indication

Dynamically returning certificates for a service based on the requested hostname.


Authentication of clients and authorization to access resources.


Compression of responses.


An application layer load balancer may offer the ability to cache responses to reduce load.

Request Tracing

Assigning each request a unique id for the purposes of logging, monitoring and troubleshooting.


The ability to redirect an incoming request based on factors such as the requested path.

Fixed Response

Returning a static response for a request such as an error message.

High Availability

Load balancing services may offer a high availability SLA such as an uptime guarantee of 99.99%. This requires multiple load balancers such that load balancers themselves will failover if there is a problem.

Rate Limiting

Imposing limits on the rate at which a single client is entitled to a response.


A load balancing service may offer a network firewall or web application firewall as an integrated feature.


Load balancers are a good place to monitor your traffic as everything passes through them. As such, load balancers may provide performance, health and security monitoring tools and integrations.


Logging of request and response metadata. This can serve as an important audit trail or source for analytics data.


There are ways to achieve load balancing without a load balancer. For example, clients can be designed to pick a random choice from a list of currently running domains or IPs. Edge computing is another approach to distributing load that involves returning a different DNS result to clients in different regions to serve them from the data center closest to their location.
Overview: Load Balancing
A class of tools for distributing workloads across multiple computing resources.
Related Concepts

Information Technology

This is the complete list of articles we have written about information technology.
App Management
Audit Trail
Business Software
Cloud Computing
Cloud Scaling
Code Smell
Complexity Hiding
Dark Data
Data Architecture
Data Dredging
Data Infrastructure
Data Integration
Data Science
Data Security
Data Wrangling
Deep Magic
Digital Transformation
Edge Computing
Enterprise Architecture
Event Processing
High Availability
Horizontal Scale
Information Science
Information Security
Information Technology
IT Architecture
IT Artifact
IT Assets
IT Biases
IT Capabilities
IT Controls
IT Gaps
IT Goals
IT Governance
IT Lifecycle
IT Management
IT Metrics
It Metrics
IT Objectives
IT Operations
IT Planning
IT Risks
IT Services
IT Strategy
IT Support
Key Stretching
Last Mile
Least Privilege
Low Technology
Managed Services
Master Data
Network Arch.
Network Infra.
Office Automation
Operating Systems
Overlay Network
Password Entropy
Payback Period
Proof Of Work
Quality Assurance
Regression Testing
Reputation Systems
Self Service
Service Level
Service Management
Software Quality
Solution Architecture
Strategic Planning
System Architecture
Technical Skills
Technology Culture
Technology Issues
Technology Strategy
Unstructured Data
Utility Computing
Workload Automation
If you enjoyed this page, please consider bookmarking Simplicable.

IT Infrastructure

A definition of IT infrastructure with several examples.

Network Infrastructure

A list of common types of network infrastructure.

Proxy vs Reverse Proxy

The difference between proxies and reverse proxies with examples.

API Gateway

The definition of API gateway with examples.

Infrastructure Examples

An overview of infrastructure with examples.

Computing Platform

A list of the basic types of computing platform.

Building Infrastructure

An overview of building infrastructure with examples.


A list of networking techniques and concepts.

Near Real-Time

A definition of near real-time with examples.

Pervasive Networks

A definition of pervasive networks with examples.


A definition of network with examples.

Wide Area Network

A definition of wide area network with examples.

Personal Area Network

A definition of personal area network with examples.


A definition of extranet with several examples.
The most popular articles on Simplicable in the past day.

New Articles

Recent posts or updates on Simplicable.
Site Map