312-38 EC-Council Network Security Administrator (ENSA) - Practice Questions

Question 16

Which among the following is used to limit the number of cmdlets or administrative privileges of administrator, user, or service accounts?

Select an option, then click Submit answer.

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Just Enough Administration (EA)
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User Account Control (UAC)
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Windows Security Identifier (SID)
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Credential Guard

Question 17

The agency Jacob works for stores and transmits vast amounts of sensitive government data that cannot be compromised. Jacob has implemented Encapsulating Security Payload (ESP) to encrypt IP traffic. Jacob wants to encrypt the IP traffic by inserting the ESP header in the IP datagram before the transport layer protocol header. What mode of ESP does Jacob need to use to encrypt the IP traffic?

Select an option, then click Submit answer.

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Jacob should use ESP in pass-through mode.
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Jacob should utilize ESP in tunnel mode.
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He should use ESP in gateway mode.
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He should use ESP in transport mode.

Question 18

Which of the following key features is used by TCP in order to regulate the amount of data sent by a host to another host on the network?

Select an option, then click Submit answer.

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Sequence number
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TCP timestamp
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Congestion control
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Flow control

Reference / correct answer:

Flow control

Flow control is the process of regulating the amount of data sent by a host to another host on the network. The flow control mechanism controls packet flow so that a sender does not transmit more packets than a receiver can process. TCP uses a sliding window flow control protocol. In each TCP segment, the receiver specifies in the receive window field the amount of additional received data (in bytes) that it is willing to buffer for the connection. The sending host can send only up to that amount of data before it must wait for an acknowledgment and window update from the receiving host. Answer option A is incorrect. TCP uses a sequence number for identifying each byte of data.

Answer option B is incorrect. TCP timestamp helps TCP to compute the round-trip time between the sender and receiver.

Answer option C is incorrect. Congestion control concerns controlling traffic entry into a telecommunications network, so as to avoid congestive collapse by attempting to avoid oversubscription of any of the processing or link capabilities of the intermediate nodes and networks and taking resource reducing steps, such as reducing the rate of sending packets. It should not be confused with flow control, which prevents the sender from overwhelming the receiver.

312-38 – EC-Council Network Security Administrator (ENSA)