Understanding Network Access: Intranet vs. Internet

The question asks about a type of network where computers within the network cannot be accessed from outside the local network unless specific permission is granted. Let's look at the options provided to determine which one fits this description.

Analyzing the Options

• Intranet: An Intranet is a private network, typically within an organization, that uses Internet protocols and connectivity. Access to an Intranet is restricted to authorized personnel, usually employees. This means computers and resources within an Intranet are generally not accessible from the public Internet without specific security measures and permissions. This matches the description in the question.
• Internet: The Internet is a global public network connecting billions of devices worldwide. While specific resources or computers on the Internet might require authentication or have firewalls, the fundamental nature of the Internet is public and accessible to anyone with a connection, unlike a restricted local network described.
• Middleware: Middleware is a type of software that provides services to software applications beyond those available from the operating system. It helps applications communicate with each other. Middleware is not a type of network itself.
• Modern: "Modern" is an adjective describing something current or contemporary. It is not a term used to define a type of computer network based on its access restrictions.

Conclusion

Based on the definitions, a network where computers cannot be accessed from outside the local network unless given permission is characteristic of an Intranet. It is designed for internal use and restricts external access by default for security and privacy.