Answer:
Explanation:
When most non-technical people hear the term “seven layers”, they either think of the popular Super Bowl bean dip or they mistakenly think about the seven layers of Hell, courtesy of Dante’s Inferno (there are nine). For IT professionals, the seven layers refer to the Open Systems Interconnection (OSI) model, a conceptual framework that describes the functions of a networking or telecommunication system.
The model uses layers to help give a visual description of what is going on with a particular networking system. This can help network managers narrow down problems (Is it a physical issue or something with the application?), as well as computer programmers (when developing an application, which other layers does it need to work with?). Tech vendors selling new products will often refer to the OSI model to help customers understand which layer their products work with or whether it works “across the stack”.
Layer 7 - Application
To further our bean dip analogy, the Application Layer is the one at the top--it’s what most users see. In the OSI model, this is the layer that is the “closest to the end user”. It receives information directly from users and displays incoming data it to the user. Oddly enough, applications themselves do not reside at the application layer. Instead the layer facilitates communication through lower layers in order to establish connections with applications at the other end. Web browsers (Google Chrome, Firefox, Safari, etc.) TelNet, and FTP, are examples of communications that rely on Layer 7.
Layer 6 - Presentation
The Presentation Layer represents the area that is independent of data representation at the application layer. In general, it represents the preparation or translation of application format to network format, or from network formatting to application format. In other words, the layer “presents” data for the application or the network. A good example of this is encryption and decryption of data for secure transmission - this happens at Layer 6.
A system of interconnected computers that share a central storage system and various peripheral devices such as a printers, scanners, or routers. Each computer connected to the system can operate independently, but has the ability to communicate with other external devices and computers
<span>Read more: http://www.businessdictionary.com/definition/computer-system.html</span>
Answer:
Examples of modern applications include office suites, graphics software, databases and database management programs, web browsers, word processors, software development tools, image editors and communication platforms. System software. These software programs are designed to run a computer's application programs and hardware.
Explanation:
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Answer:
True.
The code skips the else command
Explanation:
I will answer this question with the following code segment
<em>n = 1</em>
<em>If n > 0:</em>
<em> Print("greater than 0")</em>
<em>else:</em>
<em> Print("not greater than 0")</em>
<em />
From the code segment above
<em>Print("greater than 0")</em> will be executed because the condition <em>If n > 0 </em>is true
Since the if condition is true, the else condition will not be executed
Answer:
D. He should designate all the files in the shared folder as read-only.
Explanation:
The steps Rony should take while using a peer-to-peer (P2P) network to prevent his original files from being overwritten by another P2P user is that He will make the file as read-only.
In making the file read-only, other users who have access to the shared folder can only read the file without modifying it's content.
By default, he is already the owner of the file, so option B is not the correct answer.
Also making the file executable give other users higher privilege, so option A is also not correct.
