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2 years ago

Brief deacription of how hard drives have evolved

Computers and Technology

1 answer:

Zepler [3.9K]2 years ago

4 0

Answer:

The first HDD was created by IBM in 1956 and was the size of a refrigerator. The total storage capacity was 5 MB and only two heads were used to read the disks. The 1970s offered a hard disk drive in much smaller shells with the ability to store roughly 60 MB.

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Technician A says that the reserve rating of a battery is the amount of steady current that a fully charged battery can supply f

Andre45 [30]

Answer:

Neither A nor B

Explanation:

<em>Reserve capacity</em> is the number of minutes that a new, fully charged battery can discharge continuously and maintain a terminal voltage equal to or greater than 1.75 volts per cell.

<em>An ampere-hour </em>is an electric charge unit and its abbreviation is Ah.

It measures the amount of electric charge flowing through a battery in the case that amount supplies a current of 1 amp for 1 hour.

5 0

2 years ago

How many possible password of length four to eight symbols can be formed using English alphabets both upper and lower case (A-Z

Fynjy0 [20]

Answer:

In a password, symbol/characters can be repeated. first calculate the total

symbols which can be used in a password.

So there are total 26(A-Z),26(a-z),10(0-9) and 2(_,$) symbols.

that is equal to 26+26+10+2=64.

Total number of password of length 4:

here at each place can filled in total number of symbols i.e 64 way for each

place.Then total number of possible password is:

64*64*64*64=16777216

Total number of password of length 5:

here at each place can filled in total number of symbols i.e 64 way for each

place.Then total number of possible password is:

64*64*64*64*64=1073741824

Similarly,

Total number of password of length 6:

64*64*64*64*64*64=68719476736

Total number of password of length 7:

64*64*64*64*64*64*64=4398046511104

Total number of password of length 8:

64*64*64*64*64*64*64=281474976710656

Hence the total number of password possible is:285,942,833,217,536

7 0

3 years ago

For each policy statement, select the best control to ensure Ken 7 Windows Limited fulfills the stated requirements and also pro

elena-14-01-66 [18.8K]

Answer:

1. Option (a) is the correct answer. "Place a firewall between the Internet and your Web server".

2. Option (e) is the correct answer. "Require encryption for all traffic flowing into and out from the Ken 7 Windows environment".

3. Option (d) is the correct answer. "Implement Kerberos authentication for all internal servers".

4. The correct answer is option (g) "Require all personnel attend a lunch and learn session on updated network security policies".

5. Option (c) is the correct answer. "Enforce password complexity".

Explanation:

1. Users who tried to use ken 7 network resources for social media access will not be enable to do so.

2. Encryption for inflow and outflow of traffic from Ken 7 windows environment will monitor any personal devices which is connected to Ken 7 windows network.

3. The implementation of Kerberos authentication will deny anonymous users access to protected resources in Ken 7 infrastructure.

4.All personnel will be taught the network policies to avoid sending report to unsecured printers.

5. The more complex passwords are, the more secured the server will be. A complex password should be enforce for network security.

8 0

2 years ago

2.8 Code Practice: Question 1

-BARSIC- [3]

Answer:

The program to this question can be given as:

Program:

#include <stdio.h> //define header file

int main() //define main method.

{

int a1,b1,c1; //define variable

printf("Enter three numbers:\n"); //message

scanf("%d",&a1); //input numbers.

scanf("%d",&b1);//input numbers.

scanf("%d",&c1);//input numbers.

if (a1>b1) //check condition

{

//check condition

if(a1>c1)//inner if block

{

printf("The largest number: %d", a1); //message

}

else //inner else block

{

printf("The largest number: %d", c1);//message

}

else //else block

{

//check condition

if(b1>c1) //inner if block.

{

printf("The largest number: %d", b1);//message

}

else //else block

{

printf("The largest number: %d",c1);//message

}

return 0; //return 0.

}

Output:

Enter three numbers:

The largest number: 44

Explanation:

The description of the above program can be given as:

In the C language program firstly we define the header file. Then we define the main function. In the main function, we define three variables that are "a1, b1 and c1". In this variable, we take input from the user.
Then we define the conditional statements. In the if block we check if the value of a1 is greater then the value of b1 if this condition is true so we use another condition that if the value of a1 is greater then the value of c1. so, it will print the largest value. If the above condition is not true then it will go to else section.
In the else part we check the condition that if the value of b1 is greater then the value of c1. if it is true it will print the largest number value.

4 0

3 years ago

Read 2 more answers

What are the differences and similarities of computer virus and biological virus. Give 4 examples

Papessa [141]

Answer:

During recent months, we’ve witnessed an unexpected and distressing pandemic of a coronavirus disease. What I find especially distressing about it is how the worldwide adversity was caused by just a tiny thing — namely, a virus called SARS-CoV-2.

However, biological viruses have always been a potent threat to humanity, as historic pandemics have proved. No wonder viruses became an ideal weapon model in a totally different world — a world of programming. The first computer viruses were created as early as in the 1970s. Starting as pranks, they evolved to become a major threat to the stability of computer networks worldwide. And the more I think of viruses, both biological and digital, the more amazed I am by their similarities.

We don’t know what kind of challenges viruses of either type will cause in the future, but understanding how they infect, the symptoms they induce, how they spread, and the damage they can cause can help us fight both.

The Common Thread

Let’s start with the basics: What does a virus look like?

computer virus of 1999

Click image for larger version

Figure 1: Pictured on the left is an electron microscope image of SARS-CoV-2 particles - the pandemic-causing coronavirus. Source: NIAID-RML. Pictured on the right is a code snippet of a Melissa, the notorious email-spreading computer virus of 1999. Source: Gizmodo.

The images in Figure 1 might look vastly different, but, essentially, they’re the same: a string of code. In the coronavirus, it’s the RNA genome in a shell; in Melissa, it’s computer code. In both cases, the code is an “instruction” for the virus to follow.

Explanation:

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6 0

2 years ago