iii.EXPLAIN HOW A DIAGNOSTIC TOOLS ARE USED TO COLLECT DATA

Question

iv.IDENTIFY AND DESCRIBE WAYS OF IMPROVING THE PERFORMANCE OF LAN COMPUTER NETWORK
i.IDENTIFY THE DIFFERENT TYPES OF VIRUSES THAT CAN AFFECT A LAN COMPUTER NETWORK.
ii.EXPLAIN THE SYMPTOMS OF A COMPUTER NETWORK AFFECTED BY A VIRUS
iii.IDENTIFY AND DESCRIBE METHODS OF PREVENTING,DETECTING AND ERADICATING VIRUS

Answer 1

i. Different types of viruses that can affect a LAN computer network include:

1. File infectors: These viruses attach themselves to executable files and spread when the infected file is executed.
2. Boot sector viruses: These viruses infect the boot sector of a hard drive or floppy disk and are activated when the computer is started.
3. Macro viruses: These viruses infect documents and spreadsheets that contain macros, which are small programs that automate tasks within the document.
4. Worms: These viruses replicate themselves and spread across the network without the need for user interaction.
5. Trojans: These viruses disguise themselves as legitimate software but actually contain malicious code that can damage the computer or steal sensitive information.

ii. Symptoms of a computer network affected by a virus may include:

1. Slow performance: The presence of a virus can cause the computer network to slow down significantly.
2. Unexpected pop-up windows: Users may see an increase in pop-up windows appearing on their screens.
3. Unusual error messages: Users may receive error messages that are not typical for their software applications.
4. Files or programs disappearing: Viruses can delete or corrupt files and programs on the network.
5. Unauthorized access: Viruses may allow hackers to gain unauthorized access to the network, leading to security breaches.

iii. Methods of preventing, detecting, and eradicating viruses on a LAN computer network include:

1. Install antivirus software: Use reputable antivirus software to regularly scan and clean the network.
2. Keep software updated: Regularly update operating systems, applications, and antivirus software to patch vulnerabilities.
3. Use firewalls: Implement firewalls to monitor traffic and prevent unauthorized access.
4. Educate users: Train users on best practices for internet and email security to avoid downloading malicious content.
5. Back up data: Regularly back up important data to ensure it can be restored in case of a virus attack.
6. Use email filtering: Set up email filters to block suspicious attachments and links that could contain viruses.
7. Restrict user access: Limit user permissions to prevent unauthorized users from installing software or accessing sensitive information.