Understanding Computer Memory and Processor Management
Memory: There Are Two Types: Internal: Stores data temporarily while programs are running. – Ancillary (also called external memory) that stores information in the long run, even after shutdown. Main Features of Memory:
- Capacity: Represents the global volume of information (in bytes) that can be stored in memory.
- Access Time: Corresponds to the time interval between the application read/write and data availability.
- Cycle Time: Represents the minimum time interval between two successive hits.
- Throughput:
The OSI Model: A Layered Approach to Networking
Internetworking Models
When networks first came into being, computers could typically communicate only with computers from the same manufacturer. For example, companies ran either a complete IBM solution or an DECnet solution, not both together. In the late 1970s, the OSI (Open System Interconnection) model was created by the International Organization for Standardization to break this barrier. The OSI model was meant to help vendors create standard network devices.
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OSI Model: Understanding the Layers of Networking
Internetworking Models
When networks first came into being, computers could typically communicate only with computers from the same manufacturer. For example, companies ran either a complete IBM solution or an DECnet solution, not both together. In the late 1970s, the OSI (Open System Interconnection) model was created by the International Organization for Standardization to break this barrier. The OSI model was meant to help vendors create standard network devices.
The OSI model is the primary architectural
Read MoreMicrosoft Excel: A Comprehensive Guide to Features and Functionality
Excel Features and Functionality
Data Entry and Manipulation
- AutoSum: Automatically calculates formulas, a powerful feature of electronic spreadsheets.
- Conditional Formatting: Changes the formatting (font color, border, shading) of cells based on their values. You can select one or more cells and create conditions for when and how they are formatted. These conditions can be based on the selected cell’s contents or the contents of another cell.
- Formatting Options: Control the following formats:
- Number
Cybersecurity Threats: Adware, Phishing, Viruses, and Trojans
What is Adware?
Adware is a type of free software supported by advertisements that show up in pop-up windows or on a toolbar on your computer or browser. Most adware is annoying, but safe. However, some adware is used to gather your personal information, track the websites you visit, or even record your keystrokes.
Where Does Adware Come From?
Just like spyware, adware is most often built into free software, but can also be installed on your browser or operating system through a security hole.
How to
Read MoreCybersecurity Threats: Adware, Phishing, Viruses, and Trojans
What is Adware?
Adware is a type of free software supported by advertisements that show up in pop-up windows or on a toolbar on your computer or browser. Most adware is annoying, but safe. However, some adware is used to gather your personal information, track the websites you visit, or even record your keystrokes.
Where Does Adware Come From?
Just like spyware, adware is most often built into free software, but can also be installed on your browser or operating system through a security hole.