If you work with websites, servers, or have simply tried to upload files directly to the internet, you’ve probably come across the acronym FTP at some point. And, as users, we often don’t know exactly what FTP is or what it’s used for.

Although it sounds technical, the reality is that it’s a fairly simple concept to understand and very useful in everyday computing.

In this article, we’ll break down everything you need to know about the FTP protocol, how it works, when it’s used, and what alternatives exist. We’ll also see why it remains a key tool even though several decades have passed since its creation.

What is FTP in computing?

To start with the basics, FTP stands for “File Transfer Protocol.” Its function is simple: to allow a user to upload or download files between a computer and a remote server.

In other words, the FTP protocol acts as a bridge between your computer and a server, facilitating the movement of information in both directions. If you’ve ever published a website, you’ve probably used it to upload images, documents, or the website’s code itself.

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A little history about the FTP protocol

Before delving into its functions, it’s helpful to understand its origins. The FTP protocol was developed in the 1970s, at the beginning of the ARPANET network, the precursor to the internet. At that time, it was one of the few standardized ways to transfer files between connected machines.

Over the years, it has been refined, and although more secure options exist today, such as SFTP (Secure File Transfer Protocol) or FTPS (FTP over SSL), the original FTP protocol remains widely used.

What is FTP used for?

A estas alturas puede que te preguntes: además de subir archivos a un servidor, ¿para qué sirve FTP? La By now you might be wondering: besides uploading files to a server, what else is FTP used for? The answer is that it has multiple applications:

Website management: It’s the most widely used tool for uploading, updating, or deleting files on hosting servers.
Backups: Many companies use it to transfer large backups between different systems.
Sharing large files: Unlike email, which has size limits, FTP allows you to move much larger files.
Process automation: Some programs and scripts rely on FTP to exchange information automatically.

In short, it’s a reliable, fast, and versatile method for moving data in both professional and personal environments.

How the FTP protocol works

Before you start using it, it’s helpful to understand how this system works.

When we talk about what FTP is in computing, we’re not just referring to the concept itself, but also to how it establishes communication:

Client-server connection: You need a client program (for example, FileZilla or Cyberduck) that connects to the FTP server.
Access credentials: To access the server, you use a username and password. In some cases, there’s an “anonymous” mode that doesn’t require authentication, although this is uncommon nowadays.
Communication channels: The protocol uses two channels: a control channel (for commands) and a data channel (for transferring files).
File transfer: Once the connection is established, you can easily send (upload) or receive (download) information.

Types of FTP connections

There are two main modes of operation:

Active mode: the server initiates the data connection to the client.
Passive mode: the client initiates the connection. This is the most commonly used mode today because it avoids problems with firewalls and private networks.

Advantages and disadvantages of the FTP protocol

Like any system, it has its pros and cons.

Advantages:

It allows the transfer of large volumes of data.
It’s fast and quite stable.
It works on most operating systems.
It integrates easily with hosting providers.

Disadvantages:

Limited security: data travels in plain text, which poses a risk if not encrypted.
It requires the installation of an FTP client, which can be an extra step for less experienced users.
More secure and modern alternatives have emerged, although they are not as widespread.

Alternatives to FTP: SFTP and FTPS

Today, discussing what FTP means also leads us to mention its more secure versions:

SFTP: relies on the SSH protocol to encrypt communications, ensuring that data cannot be intercepted.
FTPS: adds an SSL/TLS security layer to traditional FTP.

Both options are recommended when handling sensitive data. However, the classic FTP protocol remains sufficient for many basic or specialized projects.

FTP in the day-to-day operations of a digital business

If you have a website, an online store, or any digital project, you’ll most likely need to use the FTP protocol at some point.

At Doowebs, for example, we routinely use it to manage our clients’ website files, ensuring that every update is uploaded correctly to the server. It’s an essential tool for maintaining control over the files of any digital project.

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Tips for using FTP securely

Although it’s a veteran technology, it’s important to use it with certain precautions:

Use strong passwords and change them regularly.
Whenever possible, opt for SFTP or FTPS to protect your information.
Avoid connections on public or unsecured networks.
Keep your FTP client up to date.

These simple steps can make the difference between secure and vulnerable management.

At this point, we can clearly answer the initial question: what is FTP and what is it used for? It’s a system that, although it originated more than 50 years ago, continues to be useful for quickly and efficiently transferring files between computers and servers.

While it’s true that for projects requiring maximum security, it’s advisable to use alternatives like SFTP or FTPS, the original FTP protocol remains valid in many environments.

If you have a digital project and need help managing your website, at Doowebs we have a team specializing in web development and maintenance. We can help you set up and leverage these tools to ensure your site always performs at its best.

Contact Doowebs for a free consultation.