Rewrite the below text (which is a fragment of a longer script for the video). Fix grammar and other errors and make it sound more professional.

Networks and security, or how to connect the digital world. How can we exchange data quickly and efficiently. There are different types of networks.
A local area network (LAN) is for smaller, more local networks - home, business, school, etc.
A wide area network (WAN) covers larger areas such as cities and even allows computers in different countries to connect.
An intranet is a private enterprise network designed to support an organization's employees in communicating, collaborating, and performing their roles, usually to the exclusion of outside access.
We also have the well-known internet, which is the largest network connecting computers around the world.

But of course someone could try to intercept that communication. And we want to securely exchange data. We want to find vulnerabilities and defend against hackers.
This is why we have something like cryptography. It is a field of study that focuses on the encoding and decoding of info using special algorithms. So only the sender and receiver can know the content of the message.
There are many ways to protect your data, programs, devices and networks. Besides cryptography, we also use antivirus programs that can check if anything looks suspicious. A very popular trend is also the use of artificial intelligence to defend against hackers. But hackers can also use AI to attack. So it's a double-edged sword.
Networks and security play a crucial role in connecting the digital world and ensuring the quick and efficient exchange of data. There are several types of networks, including Local Area Networks (LAN) for smaller, more localized networks like homes, businesses, and schools, and Wide Area Networks (WAN) which cover larger areas such as cities and even connect computers in different countries. An intranet is a private enterprise network specifically designed to support an organization's employees in communication, collaboration, and performance. The largest network connecting computers globally is the well-known Internet.

However, the communication between these networks is susceptible to interception, which is why ensuring the secure exchange of data is important. To defend against potential threats and vulnerabilities, cryptography is employed. Cryptography is a field of study focused on encoding and decoding information using special algorithms, allowing only the sender and receiver to understand the content of the message.

To protect data, programs, devices, and networks, various measures are in place, including cryptography and antivirus programs that scan for suspicious activity. The use of Artificial Intelligence (AI) is also becoming a popular trend in defending against hackers. However, it's important to note that AI can also be utilized by hackers, so it's a double-edged sword.
It there anything factually inaccurate here, or that might be confusing to a viewer?