Network Application Architectures

We’ll learn about network application architectures in this post.

It’s crucial to comprehend how applications are organized among end systems before we begin with application layer protocols. Application developers create what are known as network application architectures. The architecture specifies how and with whom the program will interact.

Let’s talk about a few typical application architectures.

Client-Server Architecture

A network application under this architecture is made up of two components: client-side software and server-side software. These software components, which are often referred to as processes, interact with one another via messages.


Access to a centralized resource or service, like a website, is controlled by the server process.

Two key properties of servers are:

  • Although it is hard to attain 100% availability, servers are typically kept available at all times. Additionally, servers installed for fun or as an experiment may not need to be maintained active. But for communication to occur, the client must be able to locate the server online when required.
  • They can be contacted using at least one trustworthy IP address.

The 24/7 shopping center is an excellent illustration. They are available at all times and have a phone number that is always in operation.


The Internet is used by client processes to access information and make use of services. Server processes wait for requests from clients whereas client processes almost always start connections to servers.

An Illustration

The web is an excellent illustration of client-server architecture.

Consider Google as an example. A number of Google servers manage video access. In order to visit, a client process (a browser) sends a request to one of Google’s servers for the homepage. That server was probably online when the request was sent, received it, and authorized access to the page.

Data Centers

As you may have observed, we didn’t just name one server; we said that Google has servers. This is due to the fact that, as was already said, as client-server systems grow, one or even two servers are unable to adequately manage the requests from a large client base.

Furthermore, servers may cease functioning for any cause and crash. Many servers are used by most programs in case one fails. As a result, many devices that are also referred to as servers host server operations and are located in data centers. Servers are housed in structures called data centers.

Client Server Model

Peer-to-Peer Architecture (P2P)

Applications on end-systems known as “peers” may interact with one another under this architecture. There is no need for a huge data center or dedicated server. In homes, workplaces, and colleges, peers mostly use PCs, including laptops and desktops.

The P2P architecture’s main benefit is its ability to grow quickly without requiring significant outlays of time, money, or effort.

Peer to Peer network

Despite the decentralized nature of P2P, each peer may be classified as either servers or clients, meaning that every computer has the capacity to operate as both a client and a server. In actuality, the peer who starts a connection is referred to as the client, while the other peer is referred to as the server.

An Illustration

Many widely used programs today, like BitTorrent, are built using P2P architectures.

When a file is downloaded using BitTorrent, the downloading party visits several user computers for pieces of the file and assembles them on its end. In this instance, there is no standard “server” at play.


Some server interaction is required for the hybrid architecture. P2P and client-server architectures are effectively combined in this system.

Gaurav Karwayun is the founder and editor in chief of CodeIntelligent. He has over 10+ Years of Experience in the software industry. He has experience working in both service and product-based companies. He has vast experience in all popular programming languages, DevOps, Cloud Computing, etc. Follow him on Twitter.

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