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| Section | Objectives |
|---|---|
| Network Security Controls | - Secure network devices configuration - Firewalls, IDS/IPS, and network access control |
| Network Security Monitoring | - Log analysis and SIEM fundamentals - Traffic monitoring and anomaly detection |
| Incident Response and Recovery | - Incident handling lifecycle - Disaster recovery and business continuity |
| Network Defense Fundamentals | - Network security principles and architectures - Security policies and procedures |
| Threats and Vulnerabilities | - Network reconnaissance and exploitation techniques - Malware and attack vectors |
| Data and Application Security | - Data protection mechanisms and encryption basics - Endpoint and application hardening |
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NEW QUESTION # 739
In an Ethernet peer-to-peer network, which of the following cables is used to connect two computers, using RJ-
45 connectors and Category-5 UTP cable?
Answer: B
Explanation:
In an Ethernet peer-to-peer network, a crossover cable is used to connect two computers, using RJ-45 connectors and Category-5 UTP cable.
Answer options D and A are incorrect. Parallel and serial cables do not use RJ-45 connectors and Category-5 UTP cable. Parallel cables are used to connect printers, scanners etc., to computers, whereas serial cables are used to connect modems, digital cameras etc., to computers.
Answer option B is incorrect. A loopback cable is used for testing equipments.
NEW QUESTION # 740
Which of the following layers refers to the higher-level protocols used by most applications for network communication?
Answer: A
NEW QUESTION # 741
How is the chip-level security of an loT device achieved?
Answer: A
Explanation:
Chip-level security for IoT devices is achieved by implementing security measures directly into the hardware, such as secure boot, secure firmware updates, and device authentication. This involves storing cryptographic keys in a tamper-resistant environment within the chip, ensuring that sensitive information remains secure even in the event of physical attacks on the device. Closing insecure network services is part of a broader security strategy that includes chip-level measures to protect against cyberattacks. It's important to note that while changing passwords and encrypting interfaces are also security measures, they do not pertain specifically to chip-level security.
NEW QUESTION # 742
With which of the following forms of acknowledgment can the sender be informed by the data receiver about all segments that have arrived successfully?
Answer: A
Explanation:
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.
NEW QUESTION # 743
Which of the following IEEE standards defines the demand priority access method?
Answer: A
NEW QUESTION # 744
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