We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is an Application Layer?

By Troy Holmes
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A computer network is typically designed based on a network diagram. This topology is defined based on the open systems interconnection model (OSI) and consists of seven layers of network functionality. The application layer is the highest level within OSI, which is known as layer seven. It is the network layer that manages communication programs on the network, including file transfer protocol (FTP), hypertext transfer protocol(HTTP), and email. These programs enable Internet browsers and email applications to a share data across a network.

A network begins with a physical cable and ends with a computer application. Data is forced through several levels of transformations during a typically communication transfer. This is a necessary process to ensure proper data quality and security rules are followed. The OSI model was created to enable flexibility in software protocols.

The OSI model is made up of seven layers. These are the physical, data link, network, transport, session, presentation, and application layers. The layers work within a hierarchal structure to send messages across a network.

Most computer networks today use standard transmission control protocol (TCP/IP) as the communication language for the Internet. This network protocol uses the OSI model as a blueprint on how network devices and software should interact. Each layer in the model has a specific responsibility within the network topology.

The OSI model is designed based on a hierarchal chaining of responsibility. These rules force each layer to follow specific handoff processes when sending a message through the topology. The application layer is required to follow the handoff rules of the presentation layer, which is the next level within the hierarchy chain. These rules typically include format, encryption, and specific size requirements before the message can be accepted by the next level in the chain.

Instant messaging (IM) is a poplar communication protocol that is used on cell phones and computer systems. IM is an example of software that uses the application layer protocol. The IM standard protocol makes it possible for companies to build instant messaging software. Some examples of these products include AOL® Instant Messenger, Yahoo® mail and MSN® messenger. Each program uses the OSI standards to send and receive messages across the network at this layer.

Microsoft Outlook® is an example of an email application that uses the application layer. This is the lowest level of the OSI model, which is responsible for packaging messages from a software program into an understandable computer message. The application layer sends a message to the presentation layer, which is responsible for the encryption and format rules of the message.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.