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Ivan
4 years ago
8

P6. In step 4 of the CSMA/CA protocol, a station that successfully transmits a frame begins the CSMA/CA protocol for a second fr

ame at step 2, rather than at step 1. What rationale might the designers of CSMA/CA have had in mind by having such a station not transmit the second frame immediately (if the channel is sensed idle)?
Computers and Technology
1 answer:
Karo-lina-s [1.5K]4 years ago
8 0

Answer:

To avoid collision of transmitting frames.

Explanation:

CSMA/CA, carrier sense multiple access is a media access control protocol of wireless networks that allows for exclusive transmission of frames and avoidance of collision in the network. When a frame is not being sent, nodes listening for an idle channel gets their chance. It sends a request to send (RTS) message to the access point. If the request is granted, the access point sends a clear to send (CTS) message to the node, then the node can transmit its frame.

Many nodes on a wireless network are listening to transmit frames, when a frame is transmitting, the node has to wait for the access point to finish transmitting, so it sends a RTS message again to exclusively transmit a second frame.

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. Write a function called is_sorted that takes a list as a parameter and returns True if the list is sorted in ascending order a
aalyn [17]

Answer:

There are multiple ways to solve the given problem, I will be presenting the most simple and easy way of solving this problem in few lines of code.

Python code:

def is_sorted(user_list):

   return user_list == sorted(user_list)

user_list=input("Please enter a list: ")

user_list = user_list.split()

print(is_sorted(user_list))

print("Your list: ", user_list)

Explanation:

A function is_sorted is created which takes a list as input and using the sorted() function of python which returns true when the list is sorted in ascending order and returns false when the list is not sorted in ascending order.

Driver code includes getting input list from the user and using split() function to create a list separated by space then printing the output of is_sorted function and in the last printing the contents of that list.

Output:

Please enter a list: 1 3 6 9

True

Your list:  ['1', '3', '6', '9']

Please enter a list: 15 7  2 20

False

Your list:  ['15', '7', '2', '20']

8 0
4 years ago
You would like to enter a formula that subtracts the data in cell B4 from the total of cells B2 and B3. What should the formula
anastassius [24]

Answer:

=b2 b3-b4 or something close to that, I hope this helps ^^

Explanation:

6 0
4 years ago
“What does it mean when we “rework” copyrighted material?”
Alja [10]
We use ideas and thoughts that have already been protected by the law which is called Copyright. We reworking copyright material means we are taking somebody's ideas and calling it ours. Which is not right by the law.
3 0
3 years ago
Read 2 more answers
What shows on the web, what is behind the web (source code) and what is placed on the server (database) , is known as web source
slega [8]

Answer:

A. True

Explanation:

Websites are created using html, css, javascript and other web based programming languages. When a website page is requested, the host server sends the copy of the source code to the web browser of the client system, the web browser is able to interpret the source code and displays the graphical representation on the web browser for the client.

3 0
4 years ago
You would like the user of a program to enter a customer’s last name. Write a statement thaUse the variables k, d, and s so that
mojhsa [17]

Answer:

1st question:

Use the variables k, d, and s so that they can read three different values from standard input an integer, a float, and a string respectively. On one line, print these variables in reverse order with exactly one space in between each. On a second line, print them in the original order with one space in between them.

Solution:

In Python:

k = input()  #prompts user to input value of k i.e. integer value

d = input()  #prompts user to input value of d i.e. float value

s = input()  #prompts user to input value of s i.e. a string

print (s, d, k)  #displays these variable values in reverse order

print (k, d, s)#displays these variable values in original order

In C++:

#include <iostream>    // to use input output functions

using namespace std;   //to identify objects like cin cout

int main() {    //start of main function

  int k;   //declare int type variable to store an integer value

  float d; //  declare float type variable to store a float value

  string s;   //  declare string type variable to store an integer value

  cin >> k >> d >> s;    //reads the value of k, d and s

  cout << s << " " << d << " " << k << endl;     //displays these variables values in reverse order

  cout << k << " " << d << " " << s << endl;   } // displays these variable values in original order

Explanation:

2nd question:

You would like the user of a program to enter a customer’s last name. Write a statement that asks user "Last Name:" and assigns input to a string variable called last_name.

Solution:

In Python:

last_name = input("Last Name:")

# input function is used to accept input from user and assign the input value to last_name variable

In C++:

string last_name;  //declares a string type variable named last_name

cout<<"Last Name: ";  // prompts user to enter last name by displaying this message Last Name:

cin>>last_name; // reads and assigns the input value to string variable last_name

The programs alongwith their outputs are attached.

6 0
4 years ago
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