Answer:
Physical and data link layer.
Explanation:
The ethernet cable is used at the physical layer. The physical layer consists of hardware components. This layer is responsible for transmission of data bits between two nodes via a physical wire. The data link layer provides the means in which data packets are transmitted from one node to another.
Suppose two computers (A & B) are directly connected through Ethernet cable. A is sending data to B, the packets would be sent from computer A to computer B if computer B is free if not it would wait until computer B is not transmitting before it can start sending data packets to computer B.
The reason nonessential protocols are a security issue that you should be concerned about is that: A. nonessential ports provide additional areas of attack.
<h3>What is information security?</h3>
Information security can be defined as a preventive practice which is typically used to protect an information system (IS) that use, store or transmit information, from potential theft, attack, damage, or unauthorized access, especially through the use of a body of technologies, encryption, frameworks, processes and network engineers.
In Cyber security, the reason nonessential protocols are a security issue that an end user should be concerned about is that nonessential ports would provide additional areas of attack because all protocols have weaknesses based on the principle of least privilege.
Read more on information security here: brainly.com/question/14286078
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Complete Question:
You have instructed all administrators to disable all nonessential ports on servers at their sites. Why are nonessential protocols a security issue that you should be concerned about?
Nonessential ports provide additional areas of attack.
Nonessential ports can't be secured.
Nonessential ports require more administrative effort to secure.
Answer:
(11n-5) / 12 is correct answer.
Explanation:
The Probability that key will match to nth term = 1/2
The Probability that key will match to n-1th term = 1/3
As all other probabilities are equal
The Total Probability that key matches to any of 1 to n-2 index = 1 - 1/2 - 1/3 = 1/6
The Probability that key matches to any of 1 to n-2 index = (1/6) / n-2 = (1/6)* (n-2))
Let P(i) = Probability that key matches to ith index.
The Average time complexity = 22 i=1 P(i) * i
The Average time complexity = 1/(6(n-2) * ( sum of 1 to n-2 ) + (n-1) / 3 + n/2
The Average time complexity = 1/(6(n-2) * ( n-2)*(n-1) / 2 + ( n-1) / 3 + n/2
The Average time complexity = 1/6 * (n-1)/2 + (n-1)/3 + n/2
The Average time complexity = (n-1)/12 + (n-1)/3 + n/2
The Average time complexity = (n-1 + 4 * n - 4 * 1 +6 * n)/12
The Average time complexity = 11n-5 / 12
so (11n-5) / 12 is correct answer.
