exam qs,3,4,5 Flashcards
Explain the function of a router in a network.
A router connects different networks together, such as a local area network (LAN) to the internet. It directs data between devices in the network and the internet, ensuring the data reaches the correct destination.
A company uses a wireless network in its office. Suggest two advantages and two disadvantages of using a wireless network over a wired network.
Advantages:
Mobility – Users can move freely within the range of the network.
Easy to set up – No need to run cables around the office.
Disadvantages:
Security risks – Wireless networks are more susceptible to hacking.
Lower speed – Wireless networks are typically slower than wired networks.
Explain how a firewall helps protect a computer network.
A firewall monitors and filters incoming and outgoing network traffic. It blocks unauthorized access to a network and allows only trusted data to pass through, providing a barrier against malicious attacks.
A company’s website was attacked using phishing. Describe how phishing works and one way to prevent it.
Phishing is a scam where attackers send fake emails pretending to be from a trusted source (like a bank) to trick people into revealing sensitive information such as passwords or credit card numbers. To prevent phishing, employees should be trained to recognize suspicious emails and avoid clicking on unknown links or attachments.
What is the role of an operating system?
The operating system manages the computer’s hardware and software, providing a user interface, controlling input/output devices, managing files, and handling memory.
Explain what defragmentation does to a hard drive.
Defragmentation reorganizes fragmented data on a hard drive, grouping related pieces of data together. This helps improve the speed of data retrieval and overall system performance.
A user has lost all their important files due to a system failure. How can backup software help prevent this issue in the future?
Backup software creates copies of important files and stores them in a separate location, such as an external hard drive or cloud storage. In the event of a system failure, the user can restore the files from the backup.
