ECCouncil 312-38 Exam Dumps - Actual Questions Answers

A Circuit Level Gateway operates at the session layer of the OSI model. It monitors the TCP handshake to ensure that the session is legitimate and can intercept the communication. This type of firewall does not inspect the packets themselves but rather ensures that the connection is valid. It can be seen as a middleman that relays TCP connections between the user and the external network, making it appear as if the firewall is the source or destination of the communication. This is a cost-effective solution that complements the existing packet filtering firewall by adding session-level control without the need for deep packet inspection or application-level gateways, which can be more resource-intensive.

References: The functionality of Circuit Level Gateways is described in various cybersecurity resources, including LinkedIn’s explanation of common types of firewalls used in operating systems, which outlines how they operate at the session layer and establish virtual circuits1. Additionally, GeeksforGeeks provides an overview of the Session Layer in the OSI model, which is where Circuit Level Gateways function2.

The Field-Based Approach in event correlation involves systematically checking and comparing all fields for both positive and negative correlations to determine the relationships across one or multiple fields. This approach is methodical and intentional, examining the data within each field and across fields to identify patterns and connections that may indicate security events or incidents.

References: The explanation is based on the principles of event correlation as described in network security literature and aligns with the Certified Network Defender (CND) objectives that focus on identifying and analyzing security events through various correlation methods.

The Zero-trust network model is designed to ensure strict identity verification for every user or device attempting to access network resources, regardless of whether they are inside or outside the network perimeter. This model operates on the principle of “never trust, always verify,” which means that no one is trusted by default, and verification is required from everyone trying to gain access to resources on the network. On the other hand, the Castle-and-Moat model operates on the principle that once inside the network, users or devices are generally trusted. This model does not enforce strict identity verification for every user or device within the network, which is a fundamental difference from the Zero-trust model.

References: The information about the Zero-trust network model aligns with the Certified Network Defender (CND) course objectives, which include understanding various network security models and their characteristics. The Zero-trust model’s emphasis on strict identity verification is a key aspect of modern network security practices12. The Castle-and-Moat model’s approach of trusting users once they are inside the network is contrasted with the Zero-trust model in various security literature34.