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3 years ago

Which of the following is NOT a component of a DFD?

Computers and Technology

1 answer:

OverLord2011 [107]3 years ago

3 0

Answer:

Relationship between external entities

Explanation:

There are four primary components in all data flow diagrams: entity, process, data store and data flow.

External entity

Also recognized as performers, sources or sinks, and terminators, internal entities generate and consume information flowing between the diagramming entity and system. These data flows are the DFD's inputs and outputs.

Datastore

No activities are generated by a data store, but it merely maintains data for subsequent access. Data stores may consist of long-term files or a batch of documents stored for a short time while waiting for processing.

Dataflow

Dataflow between external entities, procedures and information shops is depicted by an arrow symbol indicating the flow direction.

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"Explain the functionality of the different layers found in the network protocol stack of an operating system such as Linux"

arsen [322]

Answer:

There are 7 layers in linux.

Explanation:

As networking is difficult and complex.

Imagine if every application had to know how to communicate on every step that would be more than just complex. So, rather than reinvent something which will help it to communicate let’s just make something that will automatically controls the communication and for that protocols came in to live.

As for the linux operating system, it is not exceptional from other operating systems.

There are 7 layers on network protocol stack use to communicate with other network protocol stack.

1. Application layer

2. System call interface

3. Protocol agnostic interface

4. Network protocol

5. Device agnostic interface

6. Device drivers

7. Physical hardware

All the layers vary in their functionality.

One more important thing to remember is that the network protocol stack layers is not one way its 2 way communication. First, when a client request to a network and second, when the request is full filled.

The top most layer is a part of user space, the next five layers comes in the kernel space and the final layer is the physical layer.

Application layer:

When a client or user request to a network the request initially comes to this layer.

On this layer we use tcp/ip protocol.

System call interface(SCI):

When application layer make a call to the kernel this layer handles that call. And take the request to the next layer.

Protocol agnostic interface:

This layer has two functions “talking” or “listening”. There is a thing called sockets which perform these functions and each socket has an id which is used specifically for an application.

Network protocol:

This layer is used for how the data is sent or received.

Device agnostic interface:

It is used to connect data from/to kernel user space and the network device drivers which allows the data to prepare itself for transmission over the medium from the network device.

Physical hardware :

This layer is responsible for the data packets transmission and received from the network medium being used whether cable or wireless.

5 0

3 years ago

How has the global marketplace used emerging technologies to expand businesses

madam [21]

Answer:

Information Technology (IT) has revolutionized the way organizations conduct business by enabling small and medium businesses to level the playing field with larger organizations. Small businesses use an array of technology based on everything from computer server stations to portable mobile devices to expand competitive advantages in the global economic marketplace and marketing environment. So, small & medium business organizations owners are considering implementing information technology (IT) in their planning process for streamlined integration. Thus, this process is leading to future business expansion locally as well as globally. This decision allows proprietors to create smooth business operations using the most effective information technology available. On the other hand, the Internet has further linked the overseas suppliers of goods and services and their buyers. During the e-commerce era, internet traffic is increasing day by day, and e-commerce business is in the hyper growth stage. Information technology tremendously helps to boost the expansion of the current and future of marketing environment; communication technology became faster than ever. Though, globalization creates a little challenge for multinational companies to share resources and knowledge across a number of businesses inside and outside the country. Outsourcing and freelancer ease this challenge because multinational companies recruit talent freelancers and outsource their projects to the highly expert vendors and then the works are done through the team of people very effectively and efficiently.

Explanation:

6 0

2 years ago

Which are guidlines for using themes? Check all that apply

Andreyy89

Answer: A. Using different cell styles can help you differentiate different types of data.

B. Fonts should be easily readable and of appropriate size.

D. Be consistent with themes across worksheets and workbooks.

Explanation:

A theme refers to the preset package that contains functionality details and graphical appearance.

The guidelines for using themes include:

• Using different cell styles can help you differentiate different types of data.

• Fonts should be easily readable and of appropriate size.

• Be consistent with themes across worksheets and workbooks.

Therefore, the correct options are A, B and D.

7 0

3 years ago

What occurs when information is copied from an internet source to another computer?

Margarita [4]

The answer is pasting

3 0

3 years ago

Which of the following questions will most likely be answered by displaying data on a line graph?

Artemon [7]

I'm pretty sure the answer is b

4 0

3 years ago