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  1. Home
  2. EC-COUNCIL Certification
  3. 312-38 Exam
  4. EC-COUNCIL.312-38.v2024-08-10.q281 Dumps
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Question 106

A stateful multilayer inspection firewall combines the aspects of Application level gateway, Circuit level gateway and Packet filtering firewall. On which layers of the OSI model, does the Stateful multilayer inspection firewall works?

Correct Answer: A
A stateful multilayer inspection firewall operates across multiple layers of the OSI model, specifically the Network, Session, and Application layers. It combines the features of packet filtering, circuit-level gateway, and application-level gateway firewalls. This type of firewall inspects the state and context of network traffic, ensuring that all packets are part of a known and valid session. It can make decisions based on the connection state as well as the contents of the traffic, providing a thorough inspection across these layers.
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Question 107

Which of the following is a maintenance protocol that permits routers and host computers to swap basic control information when data is sent from one computer to another?

Correct Answer: B
Internet Control Message Protocol (ICMP) is a maintenance protocol that allows routers and host computers to swap basic control information when data is sent from one computer to another. It is generally considered a part of the IP layer. It allows the computers on a network to share error and status information. An ICMP message, which is encapsulated within an IP datagram, is very useful to troubleshoot the network connectivity and can be routed throughout the Internet.
Answer option D is incorrect. BGP stands for Border Gateway Protocol. It is an interautonomous system routing protocol and is a form of Exterior Gateway Protocol (EGP). This protocol is defined in RFC-1267 and RFC-1268. It is used for exchanging network reachability information with other BGP systems. This information includes a complete list of intermediate autonomous systems that the network traffic has to cover in order to reach a particular network. This information is used for figuring out loop-free interdomain routing between autonomous systems.
BGP-4 is the latest version of BGP.
Answer option A is incorrect. Internet Group Management Protocol (IGMP) is a communication protocol that multicasts messages and information among all member devices in an IP multicast group. However, multicast traffic is sent to a single MAC address but is processed by multiple hosts. It can be effectively used for gaming and showing online videos. IGMP is vulnerable to network attacks.
Answer option C is incorrect. Simple Network Management Protocol (SNMP) is a part of the TCP/IP protocol suite, which allows users to manage the network. SNMP is used to keep track of what is being used on the network and how the object is behaving.
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Question 108

Blake is working on the company's updated disaster and business continuity plan. The last section of the plan covers computer and data incidence response. Blake is outlining the level of severity for each type of incident in the plan. Unsuccessful scans and probes are at what severity level?

Correct Answer: B
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Question 109

Daniel who works as a network administrator has just deployed an in his organizations network. He wants to calculate the False Positive rate for his implementation. Which of the following formulas will he use to calculate the False Positive rate?

Correct Answer: A
The False Positive rate (FPR) is a measure used in statistics and network security to evaluate the performance of a security system. It is calculated by dividing the number of false positives (FP) by the sum of false positives (FP) and true negatives (TN). The formula is represented as:
FPR=FP+TNFP
This rate indicates how often benign activities are incorrectly flagged as malicious, which is crucial for a network administrator like Daniel to understand the reliability of the security measures implemented.
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Question 110

With which of the following forms of acknowledgment can the sender be informed by the data receiver about all segments that have arrived successfully?

Correct Answer: D
Selective Acknowledgment (SACK) is one of the forms of acknowledgment. With selective acknowledgments, the sender can be informed by a data receiver about all segments that have arrived successfully, so the sender retransmits only those segments that have actually been lost. The selective acknowledgment extension uses two TCP options: The first is an enabling option, "SACK-permitted", which may be sent in a SYN segment to indicate that the SACK option can be used once the connection is established. The other is the SACK option itself, which can be sent over an established connection once permission has been given by "SACK-permitted". Answer option A is incorrect. Block Acknowledgment (BA) was initially defined in IEEE 802.11e as an optional scheme to improve the MAC efficiency. IEEE 802.11n capable devices are also referred to as High Throughput (HT) devices.Instead of transmitting an individual ACK for every MPDU, multiple MPDUs can be acknowledged together using a single BA frame. Block Ack (BA) contains bitmap size of 64*16 bits. Each bit of this bitmap represents the status (success/failure) of an MPDU. Answer option B is incorrect. With Negative Acknowledgment, the receiver explicitly notifies the sender which packets, messages, or segments were received incorrectly that may need to be retransmitted. Answer option C is incorrect. With Cumulative Acknowledgment, the receiver acknowledges that it has correctly received a packet, message, or segment in a stream which implicitly informs the sender that the previous packets were received correctly. TCP uses cumulative acknowledgment with its TCP sliding window.
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