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oee [108]
3 years ago
9

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

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:
DerKrebs [107]3 years ago
5 0

Answer:

There could be a collision if a hidden node problem occurs.

Explanation:

CSMA/CA(carrier sense multiple access/ collision avoidance) is a multiple access method in wireless networking, that allows multiple node to transmit. Collision avoidance of this method is based on preventing signal loss or downtime as a result of collision of transmitting multi signals.

If a node at step 4(transmit frame) sends the first frame, the node still needs to send a RTS(request to send) and to receive a Clear to send (CTS) from the WAP, the is to mitigate the issue of hidden node problem as all frame are treated as unit, so other listening nodes, not detected would seek to connect and transmit as well.

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What is the proper order for the fetch-execute cycle?
vesna_86 [32]

Control Unit – controls all parts of the computer system. It manages the four basic operations of the Fetch Execute Cycle as follows:

Fetch – gets the next program command from the computer’s memory

Decode – deciphers what the program is telling the computer to do

Execute – carries out the requested action

Store – saves the results to a Register or Memory

Arithmetic Logic Unit (ALU) – performs arithmetic and logical operations

Register – saves the most frequently used instructions and data

5 0
3 years ago
The spreadsheet ends after you reach column Z and row 99. True or false
Mandarinka [93]

Answer:

False

Explanation:

Excel Spreadsheet 2010 and above have 2^14 columns i.e. 16384 columns and 2^20 rows i.e. 1048576 rows.

First 26 columns are from A to Z and then the next column will user another Digit and start with A, so the 27th column will be AA.

26th column = Z

27th column = AA

28th column = AB

etc.

8 0
3 years ago
Which of the following dimensions of e-commerce technology involves the integration of video, audio, and text marketing messages
crimeas [40]

Answer:

Richness (Information Richness)

Explanation:

Information richness refers to the complexity of combining  video, audio and  make a marketing advert, the information generated is considered rich. other features or dimensions include; interactivity, information density, personalization etc

3 0
4 years ago
Using your digital camera, frame a well-lit scene with the following settings:
yan [13]

Answer:(Answers may vary.)

Initial shutter speed: 1/50 second

Initial aperture: f/8

Result: Dark/light image

Shutter speed: 1/30 second (if the original image is dark)

Aperture: f/8

Result: A lighter image

Shutter speed: 1/80 second (if the original image is light)

Aperture: f/8

Result: A darker image

Initial shutter speed: 1/50 second

Initial aperture: f/8

Result: Dark/light image

ISO: 400, 200, 100  (if the earlier image is overexposed)

ISO: 100, 200, 400 (if the earlier image is underexposed)

Explanation:

6 0
3 years ago
Write a program that passes an unspecified number of integers from command line and displays their total.
Svetradugi [14.3K]

Answer:

Explanation:

I will go straight to the code, and hope it didn't confuse you.

Here is it

public static void main(String[] args)

int [] x = new int [args.length]

for (int y = 0; y< args.length;yi++)

int[y] = (int) args [y]

5 0
3 years ago
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