Analysis of Computer Network Security Problems and Countermeasures

Types of Computer Network Security Threat 
Network threats are potentially exploiting network security flaws that could lead to unauthorized 
access, information disclosure, resource depletion, resource theft, or destruction. Network security 
faces threats from many sources and changes over time. There are several types of cyber security 
threats: 
Physical Threat. Including theft, espionage, and identification errors. At present, computer theft 
has also occurred, especially with the important documents of the machine, making it easy to have 
illegal acts of theft, resulting in unnecessary losses. 
System Loopholes. Including unsafe service, configuration and initialization. System 
vulnerabilities can easily cause network security threats, to regularly check the system, update the 
system patch, which can be a good way to prevent vulnerabilities and security threats. 
Identity Threat. Including non-comprehensive consideration of algorithm, free password, 
password crack and password trap. People sometimes need to use the username and password to use 
the Internet, and at this time, password setting is particularly important and cannot be arbitrarily set. 
Therefore, there should be a certain degree of difficulty, thus playing a protective role. 
Threat to Cable Connection. Including dial-in entry, impostor and eavesdropping. 
Eavesdropping occurs in cable threats, and in a broadcast network system, each node reads data 
from the Internet, such as eavesdropping, installing monitors, and so on. 
Harmful Programs. Including viruses, trojans, updates or downloads. With the increasing 
degree of people’s dependence on computer systems and the network, computer virus has posed a 
serious threat to the computer system and the network. Because the various devices in the network 
7th International Conference on Social Network, Communication and Education (SNCE 2017)
Copyright © 2017, the Authors. Published by Atlantis Press. 
This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). 
Advances in Computer Science Research, volume 82
905

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system are interconnected, if a device is attacked by a virus, it may affect the entire network. The 
virus is destructive, hidden, infectious and communicable, latent and unpredictable.