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2 years ago

Why is it important to identify cables and conductors?

Computers and Technology

1 answer:

nlexa [21]2 years ago

8 0

Answer:

While we almost never get to see most of the cables, they power everything so it only makes sense that you should know what the different types of cables and wires are, so that you can pick accordingly and have your equipment, devices and appliances powered properly.

It is also important to identify cables and conductors for safety purposes, such as emergencies linked with electricity.

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Why is a DNS cache poisoning attack dangerous? Check all that apply. A. Errrr...it's not actually dangerous. B. It allows an att

larisa [96]

Answer:

(B) It allows an attacker to redirect targets to malicious webserver.

(D) It affects any clients querying the poisoned DNS server.

Explanation:

DNS cache poisoning is a serious type of attack that is designed to exploit the vulnerabilities inherent in a Domain Name Server (DNS) where a user is redirected from a real server to a fake one. It is also called DNS spoofing.

Normally, when your browser tries to visits a website through a given domain name, it goes through the DNS server. A DNS server maintains a list of domain names and their equivalent Internet Protocol addresses. This server (DNS) then responds to the request with one or more IP addresses for the browser to reach the website through the domain name.

The computer browser then get to the intended website through the IP address.

Now, if the DNS cache is poisoned, then it has a wrong entry for IP addresses. This might be via hacking or a physical access to the DNS server to modify the stored information on it. Therefore, rather than responding with the real IP address, the DNS replies with a wrong IP address which then redirects the user to an unreal website.

Although they might not be able to control your computer remotely as long as you are not trying to visit a web page via the poisoned information, there are other dangers attached to this type of attack.

Once the DNS server has been poisoned, any client trying to query the server will also be affected since there is no direct way of knowing if the information received from the server is actually correct.

4 0

4 years ago

# q7 - create function readFileFirstLast() to meet the conditions below

MAVERICK [17]

Answer:

See explaination

Explanation:

def readFileFirstLast(filename):

# doc string

''' Function accept the filename and opens the fle

and reads all lines and strips new line character and

stores first and last in a string and return that string'''

#eception handle if file not found

try:

#opening the file

f = open(filename)

#reading the first line and striping the ne line

string = f.readline().strip()

#iterating until last line

for line in f:

pass

#concate the last line after strip the new line character to the string

string = string + " " + line.strip()

#return the string

return string

except:

#if file not found

return "File not found"

#taking the file name from user

filename = input("Enter a file name: ")

#printing the doc string in function

print("\ndoc_sting: \n"+ readFileFirstLast.__doc__+"\n")

#printing the returned string by calling the readFileFirstLast()

print("output string :")

print(readFileFirstLast(filename))

3 0

3 years ago

A user's computer will not boot. A technician notices four indicator lights on the backside of the

vaieri [72.5K]

Answer:

Explanation:

Computer manual is the user guide that comes along with the computer set to inform the users about the functions, ways to assemble the parts, and so on.

The user manual consists of guide for the users specially for electronic products such as computers, refrigerators; softwares, and so on. These manuals are written by technical writers, programmers, etc.

In the given scenario the technician needs to refer to computer manual to know the meaning of the lights on the backside of the computer.

So, the correct answer is option B.

6 0

3 years ago

A cycle merchant allows 15% discount on the marked price of a bicycle and still he makes a profit

lions [1.4K]

Answer:

The program in Java is as follows:

public class Main{

public static void main(String[] args) {

double discount_percent = 0.15;

double discount_amount = 600;

double profit = 0.20;

double marked_price = discount_amount/discount_percent;

double cost_price = marked_price/(1 + profit);

System.out.println("Marked Price: "+marked_price);

System.out.println("Cost Price: "+cost_price);

}}

Explanation:

For explanation purpose, let

$MP \to$ Marked Price

$\%D \to$ Percentage discount

$D \to$ Discounted amount

$\%P \to$ Percentage Profit

$C \to$ Cost Price

The marked price (i.e. selling price) is calculated discount using:

$MP = \frac{D}{\%D}$

The derived formula of the cost price from percentage profit and Marked Price is:

$C = \frac{M}{1 + \%P * 100}$

So, the explanation is as follows:

The next three lines declare and initialize the given parameters

double discount_percent = 0.15;

double discount_amount = 600;

double profit = 0.20;

Calculate marked price

double marked_price = discount_amount/discount_percent;

Calculate cost price

double cost_price = marked_price/(1 + profit);

Print marked price

System.out.println("Marked Price: "+marked_price);

Print Cost price

System.out.println("Cost Price: "+cost_price);

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3 years ago

____________ reference is used when you want to use the same calculation across multiple rows or columns.

vlada-n [284]

Answer:

relative cell

Explanation:

So, if you want to repeat the same calculation across several columns or rows, you need to use relative cell references. For example, to multiply numbers in column A by 5, you enter this formula in B2: =A2*5. When copied from row 2 to row 3, the formula will change to =A3

7 0

3 years ago

Read 2 more answers

Why is it important to identify cables and conductors?​

Why is it important to identify cables and conductors?