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| Section | Objectives |
|---|---|
| Topic 1: Network Security Controls | - Firewalls, IDS/IPS, and network access control - Secure network devices configuration |
| Topic 2: Threats and Vulnerabilities | - Malware and attack vectors - Network reconnaissance and exploitation techniques |
| Topic 3: Network Security Monitoring | - Traffic monitoring and anomaly detection - Log analysis and SIEM fundamentals |
| Topic 4: Incident Response and Recovery | - Incident handling lifecycle - Disaster recovery and business continuity |
| Topic 5: Data and Application Security | - Data protection mechanisms and encryption basics - Endpoint and application hardening |
| Topic 6: Network Defense Fundamentals | - Network security principles and architectures - Security policies and procedures |
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NEW QUESTION # 790
Which of the following cables is made of glass or plastic and transmits signals in the form of light?
Answer: C
NEW QUESTION # 791
Which of the following is the full form of SAINT?
Answer: A
NEW QUESTION # 792
John works as an Ethical Hacker for www.company.com Inc. He wants to find out the ports that are open in www.company.com's server using a port scanner. However, he does not want to establish a full TCP connection. Which of the following scanning techniques will he use to accomplish this task?
Answer: A
Explanation:
According to the scenario, John does not want to establish a full TCP connection. Therefore, he will use the TCP SYN scanning technique. TCP SYN scanning is also known as half-open scanning because in this type of scanning, a full TCP connection is never opened. The steps of TCP SYN scanning are as follows:
1.The attacker sends a SYN packet to the target port.
2.If the port is open, the attacker receives the SYN/ACK message.
3.Now the attacker breaks the connection by sending an RST packet.
4.If the RST packet is received, it indicates that the port is closed.
This type of scanning is hard to trace because the attacker never establishes a full 3-way handshake connection and most sites do not create a log of incomplete TCP connections.
Answer option C is incorrect. In TCP SYN/ACK scanning, an attacker sends a SYN/ACK packet to the target port. If the port is closed, the victim assumes that this packet was mistakenly sent by the attacker, and sends the RST packet to the attacker. If the port is open, the SYN/ACK packet will be ignored and the port will drop the packet. TCP SYN/ACK scanning is stealth scanning, but some intrusion detection systems can detect TCP SYN/ACK scanning.
Answer option D is incorrect. TCP FIN scanning is a type of stealth scanning through which the attacker sends a FIN packet to the target port.
If the port is closed, the victim assumes that this packet was sent mistakenly by the attacker and sends the RST packet to the attacker. If the port is open, the FIN packet will be ignored and the port will drop that packet.
TCP FIN scanning is useful only for identifying ports of non-Windows operating systems because Windows operating systems send only RST packets irrespective of whether the port is open or closed.
Answer option B is incorrect. Xmas Tree scanning is just the opposite of null scanning. In Xmas Tree scanning, all packets are turned on. If the target port is open, the service running on the target port discards the packets without any reply. According to RFC 793, if the port is closed, the remote system replies with the RST packet.
Active monitoring of all incoming packets can help system network administrators detect an Xmas Tree scan.
NEW QUESTION # 793
Which of the following OSI layers establishes, manages, and terminates the connections between the local and remote applications?
Answer: D
Explanation:
The session layer of the OSI/RM controls the dialogues (connections) between computers. It establishes, manages and terminates the connections between the local and remote application. It provides for full-duplex, half-duplex, or simplex operation, and establishes checkpointing, adjournment, termination, and restart procedures. The OSI model made this layer responsible for graceful close of sessions, which is a property of the Transmission Control Protocol, and also for session checkpointing and recovery, which is not usually used in the Internet Protocol Suite. The Session Layer is commonly implemented explicitly in application environments that use remote procedure calls.
Answer option C is incorrect. The Application Layer of TCP/IP model refers to the higher-level protocols used by most applications for network communication. Examples of application layer protocols include the File Transfer Protocol (FTP) and the Simple Mail Transfer Protocol (SMTP). Data coded according to application layer protocols are then encapsulated into one or more transport layer protocols, which in turn use lower layer protocols to affect actual data transfer.
Answer option A is incorrect. The Data Link Layer is Layer 2 of the seven-layer OSI model of computer networking. It corresponds to or is part of the link layer of the TCP/IP reference model. The Data Link Layer is the protocol layer which transfers data between adjacent network nodes in a wide area network or between nodes on the same local area network segment. The Data Link Layer provides the functional and procedural means to transfer data between network entities and might provide the means to detect and possibly correct errors that may occur in the Physical Layer. Examples of data link protocols are Ethernet for local area networks (multi-node), the Point-to-Point Protocol (PPP), HDLC, and ADCCP for point-to-point (dual-node) connections.
Answer option B is incorrect. The network layer controls the operation of subnet, deciding which physical path the data should take, based on network conditions, priority of service, and other factors. Routers work on the Network layer of the OSI stack.
NEW QUESTION # 794
The GMT enterprise is working on their internet and web usage policies. GMT would like to control internet bandwidth consumption by employees. Which group of policies would this belong to?
Answer: D
Explanation:
The control of internet bandwidth consumption by employees falls under the Network Services Specific Security Policy. This category of policy is designed to manage and secure the services that are provided over the network, which includes internet access and usage. It encompasses the rules and procedures that govern how network services, such as bandwidth, are allocated and used within an organization. By implementing such policies, GMT enterprise aims to ensure that the network's bandwidth is utilized effectively and in alignment with the company's operational requirements and objectives.
References: The answer is derived from the understanding of network security policies as outlined in the Certified Network Defender (CND) course by EC-Council, which emphasizes the importance of specific policies for managing network services and resources.
NEW QUESTION # 795
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