Network defense protection - Network security overview

Network Defense Protection - Network Security Overview

2024-07-11

1. Concept of Cybersecurity

1. Cyberspace - an interdependent network of information infrastructure.

Cyberspace is different from the Internet as we understood it before. It is not only an illusory and virtual thing, but it is more integrated into our real physical devices, which means that this cyberspace is supported by physical entities.

Communication confidentiality stage --- Computer security stage --- Information system security --- Cyberspace security
APT attack --- Advanced persistent threat
Network security (cyberspace security) is essentially information security on the Internet, which means that the hardware, software and data of the network system are protected from damage, modification and leakage, and the system runs reliably and normally, and the network service is not interrupted.

Information security: measures to prevent any unauthorized access to data, or to prevent intentional or unintentional leakage, destruction, or loss of information, so as to keep data in a state or characteristic that is away from danger and free from threats.

2. Distributed computing: Is the computing power of a device limited? Then can I combine multiple devices to jointly compute if I need to deal with some more complex problems?

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