An operating system for a computer is software that help all the computer's software and hardware understand each other. It manages all the parts of the computer, without the operating system the computer can not do anything
Answer:
Option (4) is correct answer
Explanation:
IPsec stands for Internet protocol security. It is a protocol that works between two communication points. It provides integrity, confidentiality and data authentication for any network. It is used for Virtual private network. There are two types of VPN, From which an organization needs to choose one.
IPsec and OpenSSl in which IPsec VPN uses IP security.
Benefits of this network are as follows--
- Option 1 states that it works after the transport layer which is true.
- Option 2 states that when any user leaves the organization they have no need to take back the martial which he had already provided to the organization which is also the benefit of IPsec.
- Option 3 states that it provides security that is also correct because it is a protocol that is designed to provide security.
Hence option D (all of the above ) are correct.
Answer:
The output of code will be 10
Explanation:
We need to find output of following code:
C = 1
Sum = 0
while (c less than 10):
C = c + 3
sum = sum + c
print (sum)
Solution:
We will check the condition of while loop, if the condition is true, then the statements inside the loop will be executed. Since brackets are not available so, only one statement is linked with while loop.
First while loop will be executed c < 10 (1<10) the condition becomes true, and statement c=c+3 will be executed ( 4=1+3) and then loop condition will be checked (4<10) the condition becomes true, and statement c=c+3 will be executed ( 7=4+3) and then loop condition will be checked (7<10) the condition becomes true and statement c=c+3 will be executed ( 10=7+3) and then loop condition will be checked (10<10) the condition becomes false, so we will come outside loop body and execute: sum=sum+c (10=0+10) and print sum i. e 10
So, The output of code will be 10
