From the local network you’re probably using to read this article to the entirety of the internet, you’re surrounded by computer networks wherever you go.

A computer network connects at least two computer systems using a medium. Sharing the same connection protocols, the computers within such networks can communicate with each other and exchange data, resources, and applications.

In an increasingly technological world, several types of computer network have become the thread that binds modern society. They differ in size (geographic area or the number of computers), purpose, and connection modes (wired or wireless). But they all have one thing in common: they’ve fueled the communication revolution worldwide.

This article will explore the intricacies of these different network types, delving into their features, advantages, and disadvantages.

Local Area Network (LAN)

Local Area Network (LAN) is a widely used computer network type that covers the smallest geographical area (a few miles) among the three main types of computer network (LAN, MAN, and WAN).

A LAN usually relies on wired connections since they are faster than their wireless counterparts. With a LAN, you don’t have to worry about external regulatory oversight. A LAN is a privately owned network.

Looking into the infrastructure of a LAN, you’ll typically find several devices (switches, routers, adapters, etc.), many network cables (Ethernet, fiber optic, etc.), and specific internet protocols (Ethernet, TCP/IP, Wi-Fi, etc.).

As with all types of computer network, a LAN has its fair share of advantages and disadvantages.

Users who opt for a LAN usually do so due to the following reasons:

  • Setting up and managing a LAN is easy.
  • A LAN provides fast data and message transfer.
  • Even inexpensive hardware (hard disks, DVD-ROMs, etc.) can share a LAN.
  • A LAN is more secure and offers increased fault tolerance than a WAN.
  • All LAN users can share a single internet connection.

As for the drawbacks, these are some of the more concerning ones:

  • A LAN is highly limited in geographical coverage. (Any growth requires costly infrastructure upgrades.)
  • As more users connect to the network, it might get congested.
  • A LAN doesn’t offer a high degree of privacy. (The admin can see the data files of each user.)

Regardless of these disadvantages, many people worldwide use a LAN. In computer networks, no other type is as prevalent. Look at virtually any home, office building, school, laboratory, hospital, and similar facilities, and you’ll probably spot a LAN.

Wide Area Network (WAN)

Do you want to experience a Wide Area Network (WAN) firsthand? Since you’re reading this article, you’ve already done so. That’s right. The internet is one of the biggest WANs in the world.

So, it goes without saying that a WAN is a computer network that spans a large geographical area. Of course, the internet is an outstanding example; most WANs are confined within the borders of a country or even limited to an enterprise.

Considering that a WAN needs to cover a considerable distance, it isn’t surprising it relies on connections like satellite links to transmit the data. Other components of a WAN include standard network devices (routers, modems, etc.) and network protocols (TCP/IP, MPLS, etc.).

The ability of a WAN to cover a large geographical area is one of its most significant advantages. But it’s certainly not the only one.

  • A WAN offers remote access to shared software and other resources.
  • Numerous users and applications can use a WAN simultaneously.
  • A WAN facilitates easy communication between computers within the same network.
  • With WAN, all data is centralized (no need to purchase separate backup servers, emails, etc.).

Of course, as with other types of computer network, there are some disadvantages to note.

  • Setting up and maintaining a WAN is costly and challenging.
  • Due to the higher distance, there can be some issues with the slower data transfer and delays.
  • The use of multiple technologies can create security issues for the network. (A firewall, antivirus software, and other preventative security measures are a must.)

By now, you probably won’t be surprised that the most common uses of a WAN are dictated by its impressive size.

You’ll typically find WANs connecting multiple LANs, branches of the same institution (government, business, finance, education, etc.), and the residents of a city or a country (public networks, mobile broadband, fiber internet services, etc.).

Metropolitan Area Network (MAN)

A Metropolitan Area Network (MAN) interconnects different LANs to cover a larger geographical area (usually a town or a city). To put this into perspective, a MAN covers more than a LAN but less than a WAN.

A MAN offers high-speed connectivity and mainly relies on optical fibers. “Moderate” is the word that best describes a MAN’s data transfer rate and propagation delay.

You’ll need standard network devices like routers and switches to establish this network. As for transmission media, a MAN primarily relies on fiber optic cables and microwave links. The last component to consider is network protocols, which are also pretty standard (TCP/IP, Ethernet, etc.)

There are several reasons why internet users opt for a MAN in computer networks:

  • A MAN can be used as an Internet Service Provider (ISP).
  • Through a MAN, you can gain greater access to WANs.
  • A dual connectivity bus allows simultaneous data transfer both ways.

Unfortunately, this network type isn’t without its flaws.

  • A MAN can be expensive to set up and maintain. (For instance, it requires numerous cables.)
  • The more users use a MAN, the more congestion and performance issues can ensue.
  • Ensuring cybersecurity on this network is no easy task.

Despite these disadvantages, many government agencies fully trust MANs to connect to the citizens and private industries. The same goes for public services like high-speed DSL lines and cable TV networks within a city.

Personal Area Network (PAN)

The name of this network type will probably hint at how this network operates right away. In other words, a Personal Area Network (PAN) is a computer network centered around a single person. As such, it typically connects a person’s personal devices (computer, mobile phone, tablet, etc.) to the internet or a digital network.

With such focused use, geographical limits shouldn’t be surprising. A PAN covers only about 33 feet of area. To expand the reach of this low-range network, users employ wireless technologies (Wi-Fi, Bluetooth, etc.)

With these network connections and the personal devices that use the network out of the way, the only remaining components of a PAN are the network protocols it uses (TCP/IP, Bluetooth, etc.).

Users create these handy networks primarily due to their convenience. Easy setup, straightforward communications, no wires or cables … what’s not to like? Throw energy efficiency into the mix, and you’ll understand the appeal of PANs.

Of course, something as quick and easy as a PAN doesn’t go hand in hand with large-scale data transfers. Considering the limited coverage area and bandwidth, you can bid farewell to high-speed communication and handling large amounts of data.

Then again, look at the most common uses of PANs, and you’ll see that these are hardly needed. PANs come in handy for connecting personal devices, establishing an offline network at home, and connecting devices (cameras, locks, speakers, etc.) within a smart home setup.

Wireless Local Area Network (WLAN)

You’ll notice only one letter difference between WLAN and LAN. This means that this network operates similarly to a LAN, but the “W” indicates that it does so wirelessly. It extends the LAN’s reach, making a Wireless Local Area Network (WLAN) ideal for users who hate dealing with cables yet want a speedy and reliable network.

A WLAN owes its seamless operation to network connections like radio frequency and Wi-Fi. Other components that you should know about include network devices (wireless routers, access points, etc.) and network protocols (TCP/IP, Wi-Fi, etc.).

Flexible. Reliable. Robust. Mobile. Simple. Those are just some adjectives that accurately describe WLANs and make them such an appealing network type.

Of course, there are also a few disadvantages to note, especially when comparing WLANs to LANs.

WLANs offer less capacity, security, and quality than their wired counterparts. They’re also more expensive to install and vulnerable to various interferences (physical objects obstructing the signal, other WLAN networks, electronic devices, etc.).

Like LANs, you will likely see WLANs in households, office buildings, schools, and similar locations.

Virtual Private Network (VPN)

If you’re an avid internet user, you’ve probably encountered this scenario: you want to use public Wi-Fi but fear the consequences and stream specific content. Or this one may be familiar: you want to use apps, but they’re unavailable in your country. The solution for both cases is a VPN.

A Virtual Private Network, or VPN for short, uses tunneling protocols to create a private network over a less secure public network. You’ll probably have to pay to access a premium virtual connection, but this investment is well worth it.

A VPN provider typically offers servers worldwide, each a valuable component of a VPN. Besides the encrypted tunneling protocols, some VPNs use the internet itself to establish a private connection. As for network protocols, you’ll mostly see TCP/IP, SSL, and similar types.

The importance of security and privacy on the internet can’t be understated. So, a VPN’s ability to offer you these is undoubtedly its biggest advantage. Users are also fond of VPNs for unlocking geo-blocked content and eliminating pesky targeted ads.

Following in the footsteps of other types of computer network, a VPN also has a few notable flaws. Not all devices will support this network. Even when they do, privacy and security aren’t 100% guaranteed. Just think of how fast new cybersecurity threats emerge, and you’ll understand why.

Of course, these downsides don’t prevent numerous users from reaching for VPNs to secure remote access to the internet or gain access to apps hosted on proprietary networks. Users also use these networks to bypass censorship in their country or browse the internet anonymously.

Connecting Beyond Boundaries

Whether running a global corporation or wanting to connect your smartphone to the internet, there’s a perfect network among the above-mentioned types of computer network. Understanding the unique features of each network and their specific advantages and disadvantages will help you make the right choice and enjoy seamless connections wherever you are. Compare the facts from this guide to your specific needs, and you’ll pick the perfect network every time.

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Agenda Digitale: Generative AI in the Enterprise – A Guide to Conscious and Strategic Use
OPIT - Open Institute of Technology
OPIT - Open Institute of Technology
Mar 31, 2025 6 min read

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By Zorina Alliata, Professor of Responsible Artificial Intelligence e Digital Business & Innovation at OPIT – Open Institute of Technology

Integrating generative AI into your business means innovating, but also managing risks. Here’s how to choose the right approach to get value

The adoption of generative AI in the enterprise is growing rapidly, bringing innovation to decision-making, creativity and operations. However, to fully exploit its potential, it is essential to define clear objectives and adopt strategies that balance benefits and risks.

Over the course of my career, I have been fortunate to experience firsthand some major technological revolutions – from the internet boom to the “renaissance” of artificial intelligence a decade ago with machine learning.

However, I have never seen such a rapid rate of adoption as the one we are experiencing now, thanks to generative AI. Although this type of AI is not yet perfect and presents significant risks – such as so-called “hallucinations” or the possibility of generating toxic content – ​​it fills a real need, both for people and for companies, generating a concrete impact on communication, creativity and decision-making processes.

Defining the Goals of Generative AI in the Enterprise

When we talk about AI, we must first ask ourselves what problems we really want to solve. As a teacher and consultant, I have always supported the importance of starting from the specific context of a company and its concrete objectives, without inventing solutions that are as “smart” as they are useless.

AI is a formidable tool to support different processes: from decision-making to optimizing operations or developing more accurate predictive analyses. But to have a significant impact on the business, you need to choose carefully which task to entrust it with, making sure that the solution also respects the security and privacy needs of your customers .

Understanding Generative AI to Adopt It Effectively

A widespread risk, in fact, is that of being guided by enthusiasm and deploying sophisticated technology where it is not really needed. For example, designing a system of reviews and recommendations for films requires a certain level of attention and consumer protection, but it is very different from an X-ray reading service to diagnose the presence of a tumor. In the second case, there is a huge ethical and medical risk at stake: it is necessary to adapt the design, control measures and governance of the AI ​​to the sensitivity of the context in which it will be used.

The fact that generative AI is spreading so rapidly is a sign of its potential and, at the same time, a call for caution. This technology manages to amaze anyone who tries it: it drafts documents in a few seconds, summarizes or explains complex concepts, manages the processing of extremely complex data. It turns into a trusted assistant that, on the one hand, saves hours of work and, on the other, fosters creativity with unexpected suggestions or solutions.

Yet, it should not be forgotten that these systems can generate “hallucinated” content (i.e., completely incorrect), or show bias or linguistic toxicity where the starting data is not sufficient or adequately “clean”. Furthermore, working with AI models at scale is not at all trivial: many start-ups and entrepreneurs initially try a successful idea, but struggle to implement it on an infrastructure capable of supporting real workloads, with adequate governance measures and risk management strategies. It is crucial to adopt consolidated best practices, structure competent teams, define a solid operating model and a continuous maintenance plan for the system.

The Role of Generative AI in Supporting Business Decisions

One aspect that I find particularly interesting is the support that AI offers to business decisions. Algorithms can analyze a huge amount of data, simulating multiple scenarios and identifying patterns that are elusive to the human eye. This allows to mitigate biases and distortions – typical of exclusively human decision-making processes – and to predict risks and opportunities with greater objectivity.

At the same time, I believe that human intuition must remain key: data and numerical projections offer a starting point, but context, ethics and sensitivity towards collaborators and society remain elements of human relevance. The right balance between algorithmic analysis and strategic vision is the cornerstone of a responsible adoption of AI.

Industries Where Generative AI Is Transforming Business

As a professor of Responsible Artificial Intelligence and Digital Business & Innovation, I often see how some sectors are adopting AI extremely quickly. Many industries are already transforming rapidly. The financial sector, for example, has always been a pioneer in adopting new technologies: risk analysis, fraud prevention, algorithmic trading, and complex document management are areas where generative AI is proving to be very effective.

Healthcare and life sciences are taking advantage of AI advances in drug discovery, advanced diagnostics, and the analysis of large amounts of clinical data. Sectors such as retail, logistics, and education are also adopting AI to improve their processes and offer more personalized experiences. In light of this, I would say that no industry will be completely excluded from the changes: even “humanistic” professions, such as those related to medical care or psychological counseling, will be able to benefit from it as support, without AI completely replacing the relational and care component.

Integrating Generative AI into the Enterprise: Best Practices and Risk Management

A growing trend is the creation of specialized AI services AI-as-a-Service. These are based on large language models but are tailored to specific functionalities (writing, code checking, multimedia content production, research support, etc.). I personally use various AI-as-a-Service tools every day, deriving benefits from them for both teaching and research. I find this model particularly advantageous for small and medium-sized businesses, which can thus adopt AI solutions without having to invest heavily in infrastructure and specialized talent that are difficult to find.

Of course, adopting AI technologies requires companies to adopt a well-structured risk management strategy, covering key areas such as data protection, fairness and lack of bias in algorithms, transparency towards customers, protection of workers, definition of clear responsibilities regarding automated decisions and, last but not least, attention to environmental impact. Each AI model, especially if trained on huge amounts of data, can require significant energy consumption.

Furthermore, when we talk about generative AI and conversational models , we add concerns about possible inappropriate or harmful responses (so-called “hallucinations”), which must be managed by implementing filters, quality control and continuous monitoring processes. In other words, although AI can have disruptive and positive effects, the ultimate responsibility remains with humans and the companies that use it.

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Medium: First cohort of students set to graduate from Open Institute of Technology
OPIT - Open Institute of Technology
OPIT - Open Institute of Technology
Mar 31, 2025 4 min read

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  • Medium, published on March 24th, 2025

By Alexandre Lopez

The first ever cohort will graduate from Open Institute of Technology (OPIT) on 8th March 2025, with 40 students receiving a Master of Science degree in Applied Data Science and AI.

OPIT was launched two years ago by renowned edtech entrepreneur Riccardo Ocleppo and Prof. Francesco Profumo (former minister of education in Italy), who witnessed the growing tech skills gap and wanted to combat it directly through creating a brand-new, accredited academic institution focused on innovative BSc and MSc degrees in the field of Technology.

The higher education institution has grown since its initial launch. Having started with just two degrees on offer — BSc in Modern Computer Science and an MSc in Applied Data Science and Artificial Intelligence — OPIT now offers two bachelor’s and four master’s degrees in a range of areas, such as Computer Science, Digital Business, Artificial Intelligence and Enterprise Cybersecurity.

Students at OPIT can learn from a wide range of professors who combine academic and professional expertise in software engineering, cloud computing, AI, cybersecurity, and much more. The institution operates on a fully remote system, with over 300 students tuning in from 78 countries around the world.

80% of OPIT’s students are already working professionals who are currently employed at top companies across many industries. They are in global tech firms like Accenture, Cisco, and Broadcom and financial companies such as UBS, PwC, Deloitte, and First Bank of Nigeria. Some are leading innovation at Dynatrace and Leonardo, while others focus on sustainability and social impact with Too Good To Go, Caritas, and the Pharo Foundation. From AI and software development to healthcare and international organizations like NATO and the United Nations Mine Action Service (UNMAS), OPIT alumni are making a real difference in the world.

OPIT is working on the development of the expansion of our current academic offerings, new courses, doctoral programs, applied research, and technology transfer initiatives with companies.

Once in the program, students have flexible options to complete their studies faster (by studying during the summer) or extend their studies longer than the standard duration. Every OPIT degree ends with a “capstone project”, providing them with real-life experiences in relevant businesses and industries. Some examples of capstone projects include “AI in Anti-Money Laundering: Leveraging AI to combat financial crime,” or “Predictive Modeling for Climate Disasters: Using AI to anticipate climate-related emergencies.”

The graduation on March 8th marks a pivotal moment for OPIT.

“The success of this first class of graduates marks a significant milestone for OPIT and reinforces our mission: to provide high-quality, globally accessible tech education that meets the ever-evolving demands of the job market,” said Riccardo Ocleppo, founder of OPIT.

“In just two years, we have built a dynamic and highly professional learning environment, attracting students from all over the world and connecting them with leading companies.”

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