<span>Global configuration mode can be accessed by entering the enable command.</span><span>
The device prompt for this mode ends with the ">" symbol.</span>
Answer:
SMTP
Explanation:
This is the SMTP or the Simple Mail Transfer Protocol. It is the push protocol and is used to send the mail message. Whereas POP3 and IMAP are meant for retrieving the message. These are the three main types of protocols associated with mail services. And the correct answer here is certainly the SMTP.
Most <u>Malware</u> focus on gaining entry over the internet to a secure computer system by finding a working user ID and password combination.
<u>Explanation:</u>
A malware is a small computer program which works on the user’s system without knowing to the user. Different malware works differently.
Some malware sits on the user computer, create multiple unnecessary files and make the hard drive full, some people create viruses to show their computer skills which they tend to prove in a wrong way, some malware sits in the computer to steal data especially while using internet.
So there are malware's like Virus, Worm, Trojan, spyware, etc.
Answer:
The correct answer to the following question will be "Local mapping".
Explanation:
- A data independence standard in global DBMSs where questions can be constructed without understanding the local formats. Knowledge of quotas of pieces and components is however important.
- With the transparency of local mapping, the user wants to determine both fragment location and name of data items, keeping in mind any replication that may occur.
- This is clearly a more complicated and time-consuming question for all the users to answer than the first. A program that only offers it the amount of transparency would be unlikely to be satisfactory to later part-users.
Therefore, "Local mapping" is the right answer.
Answer:
Let f be a function
a) f(n) = n²
b) f(n) = n/2
c) f(n) = 0
Explanation:
a) f(n) = n²
This function is one-to-one function because the square of two different or distinct natural numbers cannot be equal.
Let a and b are two elements both belong to N i.e. a ∈ N and b ∈ N. Then:
f(a) = f(b) ⇒ a² = b² ⇒ a = b
The function f(n)= n² is not an onto function because not every natural number is a square of a natural number. This means that there is no other natural number that can be squared to result in that natural number. For example 2 is a natural numbers but not a perfect square and also 24 is a natural number but not a perfect square.
b) f(n) = n/2
The above function example is an onto function because every natural number, lets say n is a natural number that belongs to N, is the image of 2n. For example:
f(2n) = [2n/2] = n
The above function is not one-to-one function because there are certain different natural numbers that have the same value or image. For example:
When the value of n=1, then
n/2 = [1/2] = [0.5] = 1
When the value of n=2 then
n/2 = [2/2] = [1] = 1
c) f(n) = 0
The above function is neither one-to-one nor onto. In order to depict that a function is not one-to-one there should be two elements in N having same image and the above example is not one to one because every integer has the same image. The above function example is also not an onto function because every positive integer is not an image of any natural number.
