Is physical transmission the most common method of defense against network eavesdropping?

No, in order to defend against network monitoring, the most commonly used method is "information encryption". Data information encryption is considered the most reliable form of security. It can fundamentally meet the requirements of information integrity and is a proactive security strategy.

The operating environment of this article: Windows 7 system, Dell G3 computer.

No, in order to defend against network monitoring, the most commonly used method is "information encryption".

Methods to defend against network eavesdropping

1. Use network tools to defend

Nowadays, technology is advanced and there are many tools that allow us to discover vulnerabilities in the system. , such as SATAN, etc. SATAN can analyze network management, test and report many information and identify some network-related security issues. For the problems found, SATAN provides an explanation of the problem and the possible impact on system and network security. It also explains how to deal with these problems through the information attached to the tool.

Of course there are many security tools like this. This includes scanning TCP ports or monitoring all TCP ports on multiple hosts; analyzing network protocols, monitoring and controlling multiple network segments, etc. Only by using these security tools correctly can we discover system vulnerabilities in a timely manner and nip them in the bud.

For the Windows NT system platform, you can regularly check the SECLog records in the EventLog to see if there are any suspicious situations to prevent network monitoring and port scanning.

2. Install a firewall

Firewall security technology is based on the fact that the protected network has clearly defined boundaries and services, and network security threats only come from external networks. By monitoring, restricting and changing the data flow across the "firewall", the information and structure of the protected network are shielded from the external network as much as possible to achieve network security protection. Therefore, it is more suitable for relatively independent ways to interconnect with external networks. A limited network system with relatively single and centralized network service types, such as the Internet. In terms of technical principles, "firewall" systems cannot prevent security threats from internal network systems. The enhancement of network security functions often comes at the expense of the flexibility, diversity and openness of network services, and requires a larger network. Administrative overhead.

The implementation of the firewall network security system is quite simple and is currently a widely used network security technology. However, its basic characteristics and operating costs limit its potential for application in open large-scale network systems. Since firewall-type network security assurance systems only have security assurance functions at the network boundary, and their actual scope of effectiveness is quite limited, "firewall"-type security technologies are often systems specially designed and implemented for specific needs.

For individual users, installing a good personal firewall is a very practical and effective method. Many companies have now developed personal firewalls. These firewalls often have intelligent defense cores to attack attacks and perform automatic defense to protect the security of internal networks.

3. Encrypting information transmitted on the network can effectively prevent attacks such as network monitoring.

There are currently many software packages that can be used to encrypt connections, so that even if the intruder captures the data, the The data cannot be decrypted and the meaning of eavesdropping is lost.

First of all, we should start taking precautions when buying a mobile phone. Purchasing channels are a very important link. Secondly, do not go to non-designated repair points to repair your phone casually, and do not lend your phone to others easily. If you have any doubts about your phone, you should go to the manufacturer's designated repair point for testing as soon as possible. As for the large-scale mobile phone monitoring system introduced earlier, it is already a very "standard" spy equipment. If this kind of eavesdropping device appears around us, due to its large power, the counter-intelligence department and the police will detect and discover it. These eavesdroppers, and the punishment for eavesdroppers is very severe.

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