FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -SaaS (Software-as-a-Service) SaaS-also known as cloud-based software or cloud applications-is application software that’s hosted in the cloud, and that users access via a web browser, a dedicated desktop client, or an API that integrates with a desktop or mobile operating system.

Detailed explanation-2: -A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies. At its most basic, a firewall is essentially the barrier that sits between a private internal network and the public Internet.

Detailed explanation-3: -A log file is an event that took place at a certain time and might have metadata that contextualizes it. Log files are a historical record of everything and anything that happens within a system, including events such as transactions, errors and intrusions.

Detailed explanation-4: -The Domain Name System (DNS) maps human-readable domain names (in URLs or in email address) to IP addresses. For example, DNS translates and maps the domain freecodecamp.org to the IP address 104.26. 2.33.