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Lesechka [4]
2 years ago
14

In this problem, you will derive the efficiency of a CSMA/CD-like multiple access protocol. In this protocol, time is slotted an

d all adapters are synchronized to the slots. Unlike slotted ALOHA, however, the length of a slot (in seconds) is much less than a frame time (the time to transmit a frame). Let S be the length of a slot. Suppose all frames are of constant length L = kRS, where R is the transmission rate of the channel and k is a large integer. Suppose there are N nodes, each with an infinite number of frames to send. We also assume that dprop < s,="" so="" that="" all="" nodes="" can="" detect="" a="" collision="" before="" the="" end="" of="" a="" slot="" time.="" the="" protocol="" is="" as="">
⢠If, for a given slot, no node has possession of the channel, all nodes contend for the channel; in particular, each node transmits in the slot with probability p. If exactly one node transmits in the slot, that node takes possession of the channel for the subsequent k â 1 slots and transmits its entire frame.

If some node has possession of the channel, all other nodes refrain from transmitting until the node that possesses the channel has finished transmitting its frame. Once this node has transmitted its frame, all nodes contend for the channel.

Note that the channel alternates between two states: the productive state, which lasts exactly k slots, and the nonproductive state, which lasts for a random number of slots. Clearly, the channel efficiency is the ratio of k/(k + x), where x is the expected number of consecutive unproductive slots

a. For fixed N and p, determine the efficiency of this protocol.
b. For fixed N, determine the p that maximizes the efficiency.
c. Using the p (which is a function of N) found in (b), determine the efficiency as N approaches infinity
d. Show that this efficiency approaches 1 as the frame length becomes large
Computers and Technology
1 answer:
tatuchka [14]2 years ago
5 0

Answer:

He is correct

Explanation:

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Write a while loop that prints userNum divided by 2 (integer division) until reaching 1. Follow each number by a space. Example
jasenka [17]

Answer:

public class Main

{

public static void main(String[] args) {

    int userNum = 40;

    while(userNum > 1){

        userNum /= 2;

        System.out.print(userNum + " ");

    }

}

}

Explanation:

*The code is in Java.

Initialize the userNum

Create a while loop that iterates while userNum is greater than 1. Inside the loop, divide the userNum by 2 and set it as userNum (same as typing userNum = userNum / 2;). Print the userNum

Basically, this loop will iterate until userNum becomes 1. It will keep dividing the userNum by 2 and print this value.

For the values that are smaller than 1 or even for 1, the program outputs nothing (Since the value is not greater than 1, the loop will not be executed).

4 0
2 years ago
Jim is writing a program to calculate the wages of workers in a teddy bear factory.
34kurt

Answer:

The algorithm is as follows;

1. Start

2. Input TeddyBears

3. Input Hours

4. WagebyTeddy = 2 * TeddyBears

5. WagebyHour = 5 * Hours

6. If WagebyHour > WagebyTeddy then

6.1 Print WagebyHour

7. Else

7.1. Print WagebyTeddy

8. Stop

Explanation:

The following variables are used;

TeddyBears -> Number of teddy bears made

Hours -> Number of Hours worked

WagebyTeddy -> Wages for the number of teddy bears made

WagebyHour -> Wages for the number of hours worked

The algorithm starts by accepting input for the number of teddy bears and hours worked from the user on line 2 and line 3

The wages for the number of teddy bears made  is calculated on line 4

The wages for the number of hours worked  is calculated on line 5

Line 6 checks if wages for the number of hours is greated than wages for the number of bears made;

If yes, the calculated wages by hour is displayed

Otherwise

the calculated wages by teddy bears made is displayed

3 0
2 years ago
Write a copy constructor for carcounter that assigns origcarcounter.carcount to the constructed object's carcount. sample output
Drupady [299]

#include <iostream>

using namespace std;

class CarCounter {

  public:

     CarCounter();

     CarCounter(const CarCounter& origCarCounter);

     void SetCarCount(const int count) {

         carCount = count;

     }

     int GetCarCount() const {

         return carCount;

     }

  private:

     int carCount;

};

CarCounter::CarCounter() {

  carCount = 0;

  return;

}

CarCounter::CarCounter(const CarCounter &p){

carCount = p.carCount;

}

void CountPrinter(CarCounter carCntr) {

  cout << "Cars counted: " << carCntr.GetCarCount();

  return;

}

int main() {

  CarCounter parkingLot;

  parkingLot.SetCarCount(5);

  CountPrinter(parkingLot);

  return 0;

}

Sample output:  

Cars Counted: 5

8 0
2 years ago
Read 2 more answers
The __________ of a desktop computer is the case that houses the computerâs critical parts, such as the processing and storage d
Phantasy [73]
You said it in your question. The case! Though it's also given other names, such as housing, chassis, enclosure etc.
4 0
2 years ago
The word “computer” has become associated with anything related to screens and keyboard. However, these are not the only parts t
Digiron [165]

Explanation: The CPU is the main control chip which calculates what has to be done in order for your computer to function.

(Very interesting question you had. Hope this answer helps)

4 0
2 years ago
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