Question

16 what should email policies in an organization focus on? proper usage and avoiding malicious content reducing the number of emails sent increasing the speed of email delivery enhancing the graphics of email content 17 what is a firewall? a type of computer virus a software application for creating spreadsheets a device for printing documents a system that protects a network by controlling incoming and outgoing traffic 18 what is the benefit of a star topology? high - speed data transfer rates direct connection between computers without a central server complex setup procedures centralized management and easy troubleshooting 19 what is the role of permissions in network security? granting or restricting access to specific files and folders enhancing graphics capabilities increasing the speed of data transfer reducing the need for computer maintenance

Explanation:

1. Email policies aim to ensure proper use and safeguard against malicious content like phishing or malware - laden attachments. Other options are not the main focus of policies.
2. A firewall is a system that controls network traffic to protect against unauthorized access, not a virus, spreadsheet - creating software, or a printing device.
3. Star topology has centralized management and easy troubleshooting as devices connect to a central hub or switch. High - speed data transfer isn't exclusive to it, and it has a central server. Complex setup isn't a benefit.
4. Permissions in network security are about granting or restricting access to files and folders to maintain security. Graphics, data transfer speed, and computer maintenance are not related to the role of permissions.

Answer:

1. Proper usage and avoiding malicious content
2. A system that protects a network by controlling incoming and outgoing traffic
3. Centralized management and easy troubleshooting
4. Granting or restricting access to specific files and folders