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2 years ago

What is the key difference between UDP and TCP protocols in TCP/IP reference model?

Computers and Technology

2 answers:

kramer2 years ago

7 0

Answer:

TCP is a connection oriented protocol.

UDP is a connectionless protocol.

Explanation:

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g100num [7]2 years ago

5 0

Answer:

TCP is a connection-oriented protocol, whereas UDP is a connectionless protocol. The speed for TCP is slower while the speed of UDP is faster.

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The Speed of Sound (Java Project. Please make it easy to understand. I'm a beginner at this. I believe we are supposed to use a

Ilya [14]

Answer:

The program of this question can be given as:

Program:

//import pacakge for user input.

import java.util.Scanner;

//define class

public class SpeedofSound

{

public static void main(String a[]) //define main function

{

//define variable.

String medium;

double distance,time=0;

//creating Scanner class object for input from user.

Scanner s=new Scanner(System.in);

//print message.

System.out.printf("Enter medium(air,water or steel) : ");

medium=s.nextLine(); //taking input.

//print message.

System.out.printf("Enter the distance that the sound will travel : ");

distance=s.nextDouble(); //taking input.

switch(medium) //checking condtion between range.

{

case "air":

time=distance/1100; //apply formula

break;

case "water":

time=distance/4900; //apply formula

break;

case "steel":

time=distance/16400; //apply formula

break;

default:

System.out.printf("Sorry, you must enter air,water or steel"); //error for invalid input of medium

System.exit(0);

}

System.out.printf("It take "+time+" seconds"); //print final answer.

}

Output:

Enter medium(air,water or steel) : air

Enter the distance that the sound will travel : 200

It take 0.18181818181818182 seconds

Explanation:

In this program first, we import packages for user input. Then we declare the class in the class we declare all the variables and then we create the scanner class object. It is used for taking input from the user. Then we use the switch statement It is used for condition. It works between the ranges. In the switch statement, we apply all the formula that is given in the question. and at the last, we print the output using printf function in java.

6 0

3 years ago

"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

Several students are making presentations for a science class. The chart describes the concept that each student will present to

Sedbober [7]

Question

Student presentation concepts from another source

Letitia - a step-by-step process of breaking down glucose into energy

Mana - repeating process of the steps of the cell division, going from interphase to division, and back to interphase.

Paul - a series of organisms that show similar characteristics and compare them to those that do not

Which best describes the SmartArt graphic layout each student should use?

Answer:

Letitia would use a process, Maria would use a cycle, and Paul would use a relationship.

Explanation:

Letita's assignment requires her to show how glucose can be broken down into energy, this requires a series of steps in s linear fashion, meaning it would be best suited to a process-style diagram.

Marta's project involves showing the steps of the cell cycle: the clue is in the name. This process is not linear, and instead repeats itself, meaning it fits to a cycle diagram (i.e. a circular diagram)

Paul is comparing and contrasting different organisms. Therefore, he should use a relationship diagram to show shared characteristics as well as features that differ.

4 0

3 years ago

After reviewing device security you learn that a malicious user in an airport

NARA [144]

Answer:

Sniffing.

Explanation:

Data theft can be defined as a cyber attack which typically involves an unauthorized access to a user's data with the sole intention to use for fraudulent purposes or illegal operations. There are several methods used by cyber criminals or hackers to obtain user data and these includes DDOS attack, SQL injection, man in the middle, phishing, sniffing, etc.

Sniffing can be defined as a form of cyber attack in which a malicious user gains access to a private network with the intent of finding out what information is stored on the network.

A packet sniffer also known as a packet analyzer, is a computer software or hardware tool that can be used to intercept, log and analyze network traffic and data that passes through a digital network.

Basically, an unauthorized packet sniffer is used to steal user informations.

This ultimately implies that, sniffing typically involves monitoring and capturing internet traffic (data packets) that are transmitted through a private network in real-time by using a sniffing tool, which may either be a hardware or software.

In this scenario, a malicious user in an airport terminal seating area was able to connect wirelessly to a traveling employee's smartphone and downloaded her contact list. Thus, the type of attack that has taken place is referred to as sniffing.

4 0

3 years ago

What is it called when u want 2 or more cells into 1

den301095 [7]

Answer:

Concatenate

Explanation:

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5 0

3 years ago

Read 2 more answers