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3 years ago

Which of the following is the single best rule to enforce when designing complex passwords?

Computers and Technology

1 answer:

saw5 [17]3 years ago

3 0

Answer:

B. Longer passwords

Explanation:

If the password is longer, it requires more incorrect attempts to find it, so the system could identify a potential hacker attempt. Smaller but more complex passwords could be identified by mistype or forgotten passwords.

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Oxnard Casualty wants to ensure that their e-mail server has 99.98 percent reliability. They will use several independent server

sattari [20]

Answer:

The smallest number of servers required is 3 servers

Explanation:

Given

$Reliability = 99.98\%$

$Individual Servers = 95\%$

Required

Minimum number of servers needed

Let p represent the probability that a server is reliable and the probability that it wont be reliable be represented with q

Such that

$p = 95\%\\$

It should be noted that probabilities always add up to 1;

So,

$p + q = 1$ '

Subtract p from both sides

$p - p + q = 1 - p$

$q = 1 - p$

Substitute $p = 95\%\\$

$q = 1 - 95\%$

Convert % to fraction

$q = 1 - \frac{95}{100}$

Convert fraction to decimal

$q = 1 - 0.95$

$q = 0.05$

------------------------------------------------------------------------------------------------

To get an expression for one server

The probabilities of 1 servers having 99.98% reliability is as follows;

$p = 99.98\%$

Recall that probabilities always add up to 1;

So,

$p + q = 1$

Subtract q from both sides

$p + q - q = 1 - q$

$p = 1 - q$

So,

$p = 1 - q = 99.98\%$

$1 - q = 99.98\%$

Let the number of servers be represented with n

The above expression becomes

$1 - q^n = 99.98\%$

Convert percent to fraction

$1 - q^n = \frac{9998}{10000}$

Convert fraction to decimal

$1 - q^n = 0.9998$

Add $q^n$ to both sides

$1 - q^n + q^n= 0.9998 + q^n$

$1 = 0.9998 + q^n$

Subtract 0.9998 from both sides

$1 - 0.9998 = 0.9998 - 0.9998 + q^n$

$1 - 0.9998 = q^n$

$0.0002 = q^n$

Recall that $q = 0.05$

So, the expression becomes

$0.0002 = 0.05^n$

Take Log of both sides

$Log(0.0002) = Log(0.05^n)$

From laws of logarithm $Loga^b = bLoga$

So,

$Log(0.0002) = Log(0.05^n)$ becomes

$Log(0.0002) = nLog(0.05)$

Divide both sides by $Log0.05$

$\frac{Log(0.0002)}{Log(0.05)} = \frac{nLog(0.05)}{Log(0.05)}$

$\frac{Log(0.0002)}{Log(0.05)} = n$

$n = \frac{Log(0.0002)}{Log(0.05)}$

$n = \frac{-3.69897000434}{-1.30102999566}$

$n = 2.84310893421$

$n = 3 (Approximated)$

Hence, the smallest number of servers required is 3 servers

6 0

3 years ago

QUESTION 1

slava [35]

Answer is Bit defender Internet security
B

6 0

3 years ago

Alcohol is a gateway drug. true or false?

Llana [10]

Yes because when you are continued or addicted to a certain drug (alcohol) you can get addicted to harder substances

8 0

3 years ago

Read 2 more answers

What’s the purpose of balancing or monitoring your checking account?

emmasim [6.3K]

B) To help you calculate how much money you have in your account.

3 0

3 years ago

Read 2 more answers

Task 1 – File Input

e-lub [12.9K]

Answer:

Check the explanation

Explanation:

using System;

using System.IO;

public class Program

{

public static void Main()

{

string[] lines;

Console.WriteLine("enter name of the file");

String fileName=Console.ReadLine();

Console.WriteLine("enter path of the file");

String filePath=Console.ReadLine();

using (StreamReader streamReader = File.OpenText(filePath))

{

String text = streamReader.ReadToEnd();

lines = File.ReadAllLines(filePath);

}

Console.WriteLine("Enter path of the file to write");

String outputFilePath = Console.ReadLine();

bool fileExist = File.Exists(outputFilePath);

if (fileExist)

{

overWriteOrChangeFileName(outputFilePath);

}

else

{

File.Create(outputFilePath);

File.WriteAllLines(outputFilePath, lines);

}

Console.Write("Input file Path"+filePath);

Console.Write("output file path"+outputFilePath);

void overWriteOrChangeFileName(String filePathtoCheck){

Console.WriteLine("File exists. Do you want to overwrite the file or do you want to change the location and file name of the new file.Press Y to overwrite and press C to change the location and filename");

String userInput=Console.ReadLine();

if(userInput.Equals("Y")){

File.WriteAllLines(outputFilePath, lines);

}else{

Console.WriteLine("enter new path of the file including filename");

String NewFileName=Console.ReadLine();

outputFilePath=NewFileName;

if(File.Exists(outputFilePath)){

overWriteOrChangeFileName(outputFilePath);

}

else

{

File.Create(outputFilePath);

File.WriteAllLines(outputFilePath, lines);

}

3 0

4 years ago