Answer:
The CPU. The CPU is the heart of the computer. A program is a sequence of instructions stored in main memory. When a program is run, the CPU fetches the instructions and executes or follows the instructions.
Explanation:
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A student is curious about how a Web site appears on his computer screen. There is a communication between the client and the server in the Application Layer.
Explanation:
- When we choose to open a webpage (in any browser) the seventh layer of the OSI model - called Application layer will help to do that.
- What happens after we write the webpage address in address bar is that the Application layer protocol (also called HTTP) formats and sends the request from the client's browser (Internet Explorer, Mozilla Firefox , Opera, Safari etc.) to the server.
- It also formats and sends the server's respond back to client's browser. This process happens very fast and all the OSI model layers are processing in it (not only the Application layer).
- All the layers are working together and each of them is responsible for some particular job, but all together they work as one. The layers communicate with each other and in case of error they will retry and fix the error or if they are unable to do it, the responsible layer will inform the user about the source of the problem.
- What happens when page is requested and received? If we will remove the graphical and visual image and look at the process that computer does. We will see a set of commands, mathematical algorithms, symbols, letters and not understandable codes and processes.
- When data is sent from "A" to "B", a transport layer is responsible to send and deliver it correctly and exactly the same, what was requested.
- If the request, processed by "A" (sender) is too long, the transport layer will divide it in segments (called segmentation process) to understand well and not make a mistake while sending the data to "B" (recipient). After this process data is travelling through the network to the "B" (recipient), if the sent data is segmented or divided, the transport layer is responsible for reassemble it again and "B" (recipient) receives its requested data (It can be web page or other data).
- If the transport layer will not do the segmentation process, then the next - network layer - will check the data and if the requested message is too long it will fragment it (called fragmentation process) and will provide the same as transport layer had to do.
- All the layers processes are connected to each other and work cooperatively.
Answer:
Python script is given below
Explanation:
charge = float(input('Enter the amount you were charged. $'))
#setting the formula for tip and tax
tip = charge*.18
tax = charge*.07
#printing the values
print('Charge for the food: %.2f' % charge)
print('The tip amount: %.2f' % tip)
print('Tax amount: %.2f' % tax)
print('Total amount: %.2f' % (charge+tip+tax))
Answer:
The TCP/IP is the transmission control protocol and internet protocol and in the TCP/IP model the transport layer is the second layer.
The primary responsibility of this layer is that it is basically used to deliver messages to the host and that is why it is known as end to end layer.
It basically provide the point to point connection between the destination to server host for delivering the various types of the services efficiently and reliably.
In the TCP/IP model the transport layer are basically responsible for transferring the data or service error free between the server to destination host.
