Networking Concepts

Correct Answer: A security system that monitors and controls traffic between two networks

A firewall is a security system that monitors and controls traffic between two networks, acting as a barrier between a trusted and an untrusted network. It can be either a software program or a hardware device. It prevent unauthorized access from external sources and stop data leakage from internal sources. The answer stating that a firewall boosts Wi-Fi signals is incorrect because that's the responsibility of a Wi-Fi extender, not a firewall. The answer claiming that a firewall provides anonymous browsing is also incorrect because that is the function of VPNs, proxy servers, or the Tor network, not firewalls. And finally, the answer stating that a firewall scans for viruses is wrong. While some firewalls do provide some degree of antivirus protection, this is not their primary purpose. That is the role of antivirus software.

Correct Answer: SMTP

SMTP, which stands for Simple Mail Transfer Protocol, is the primary application layer protocol used for email transmission. This protocol is responsible for sending, receiving, and relaying outgoing mail messages. On the other hand, FTP (File Transfer Protocol) is used for transferring files between servers and clients while HTTP (Hypertext Transfer Protocol) is used for transmitting hypertext over the internet, they are not used for email transmission. SSH (Secure Shell) is a network protocol used for securely performing network services over an unsecured network, and while it can be used in the process of email transmission, it is not the primary protocol used for this purpose.

Correct Answer: A subnet is a smaller network created from a larger network. It allows for better organization and management of network resources, and can improve network security.

The correct answer is 'A subnet is a smaller network created from a larger network. It allows for better organization and management of network resources, and can improve network security.' This is because a subnet, or subnetwork, is essentially a smaller network carved out of a larger one. It helps efficiently manage and allocate network resources as well as providing some levels of security by limiting the network broadcast to a smaller network area. The other answers are incorrect for the following reasons: 'A subnet is another name for a switch' is wrong because a switch is a hardware device that filters and forwards packets between LAN segments, not a subnet. 'A subnet is a type of firewall used to prevent unauthorized access to a network' is incorrect as a subnet is not a firewall, which is a network security device that monitors and filters incoming and outgoing network traffic. Lastly, 'A subnet is a tool used to scan a network for vulnerabilities' is wrong since a subnet is not a tool but a component of a network.