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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 type of control repairs the effects of damage from an attack? Physical control Technical control Corrective control Logical
Inessa [10]

Answer:

Corrective Control

Explanation:

Physical Control are devices that limit access or otherwise protect a resource, such as fences, doors, locks and fire extinguishers.

Technical Control are devices or processes that limit access to resources. Examples include user authentication, antivirus software, and firewalls. Technical controls are also called <em>Logical Control</em>

Corrective Control repair the effects of damage from an attack.  Corrective contol include: include virus removal procedures, firewall table updates, and user authorisation database updates.

8 0
4 years ago
You are a very small company that sells healthcare insurance plans. You estimate that the breach of your customer database will
lozanna [386]

Answer:

C. Accept the risk

Explanation:

The first option is close but might not be suitable for a small company considering it's cost.

The second option which is to spend fifty thousand dollars per year on a data loss prevention solution is projected to cost you more than the risk.

The third option isn't specific and lacks a course of action.

6 0
3 years ago
Write a C Program to Print the initial letter of Name Ferdous
Murrr4er [49]

Answer:

The answer to this question is given below in the explanation section.

Explanation:

The question is about writing a C program that prints the initial letter of Name Ferdous.

Therefore, below is the given complete code that prints the first letter of the name Ferdous.

<em>#include <stdio.h> </em><em>/*import strandard input/output library*/</em>

<em>#include<string.h></em><em> /*import string library to handle string type of data*/</em>

<em> </em>

<em>int main(void) </em><em> /*started the program execution- program entry point*/</em>

<em>{ </em>

<em>char *str = "Firdous";</em><em>   /*char to pointer str contains string "Firdous"*/</em>

<em>int len = strlen(str);  </em><em> /*this line of code is not neccary, but if you print other character for example last character of the name then you can use it*/</em>

<em>printf("First Letter of the name is: %c", str[0]); </em><em>  /*print first letter of the name*/</em>

<em>} </em><em>  /**program terminated*/</em>

5 0
3 years ago
Which option is an appropriate database function syntax?
kodGreya [7K]

Answer:

=DSUM(A4:D8, "Unit Cost", A1:B2)

Explanation:

From the list of given options, it's obvious that the question relates to Excel database sum function.

The correct answer among the list of options is:

=DSUM(A4:D8, "Unit Cost", A1:B2)

Where

DSUM represents the function itself

A4:D8 represents the range

"Unit cost" represents the field

and

A1:B2 represents the criteria of the function

Analysing other options:

Option 1: The equality sign (=) before excel formulas is missing

Option 2: Sum is used instead of DSUM and there's a missing bracket before the range

Option 3: There's a missing comma between the range, the field and the criteria

Hence, the last option (4) answers the question.

5 0
3 years ago
Read 2 more answers
1.an electronic index of books A. web page
zimovet [89]
It was quite difficult to understand what you need. Anyway, I've got it. I guess you need to much all the terms to each sentence. So I think I've done it right. Check it out:

1.an electronic index of books - <span>B. computer catalog
</span><span>
2.a device which categorizes and locates web sites - </span><span>H. search engine
</span><span>
3.to draw a conclusion - </span>D. infer<span> 

4.a block of information stored in an HTML file on a server - </span><span>A. web page
</span><span>
5.the table of contents of a web site - </span><span>G. home page
</span><span>
6.a software package which retrieves information from any or all available Internet servers - </span><span>I. browser
</span><span>
7.a highlighted word or phrase within a web page which acts as a "bridge" to another web page or site - </span><span>F. hyperlink
</span><span>
8.a topic sentence - </span><span>C. key sentence
</span><span>
9.a term which aids in narrowing a web search - </span>E. keyword
5 0
3 years ago
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