Analysis of Computer Network Security Problems and Countermeasures

Protection Strategies of Computer Network Security 
Secure Encryption. Encryption technology provides security guarantee for users to carry out 
e-commerce and also allows users to feel assured about online transactions. With the continuous 
development and improvement of information technology, asymmetric encryption and symmetric 
encryption is the mainstream of the development of security encryption technology. The so-called 
symmetric encryption is mainly password-based encryption technology while decryption and 
encryption need to use the same password key. 
Network Firewall. Network firewall is a technology mainly controlling access to the network. 
Firewall is used to prevent hackers to get into the network through illegal means so as to obtain 
resources and data within the network, thus protecting the network interconnection equipment and 
the internet network environment. The firewall mainly checks various network transmission data 
through relevant security measures so as to determine whether to allow access to network 
communications and dynamic monitoring of the network status. 
Network Address Translation. Network address translation is to completely retain the IP 
address, and then provided to the private network for re-use, which allows an address in the Internet. 
At the same time, it can also be combined with the firewall technology, hidden in other IP addresses, 
resulting in that external networks cannot access the internal equipment. Network address 
translation can also break the address restrictions with reasonable arrangements for network address 
use. 
Advances in Computer Science Research, volume 82
906

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Network Virus Prevention. The network environment has the feature of openness. Viruses 
attack users’ computer in a variety of forms with great destructive power and threat, and they may 
even bring catastrophic damage to users. Therefore, to prevent viruses is a key link in network 
security. Network virus prevention technologies mainly include the detection of viruses and 
prevention of viruses, in which the detection of viruses is to detect the virus poisoning features of a 
computer so as to judge whether the computer gets virus, such as keyword and self-checks, etc. 
Prevention of virus is to effectively control the system through the system’s memory, judge and 
detect whether the viruses have invaded into the system so as to prevent the poisoning and damage 
to the computer.