312-38 Exam Dumps : Certified Network Defender (CND)

The IEEE 802.16 is a series of wireless broadband standards, also known as WirelessMAN, that are designed for Metropolitan Area Networks (MANs). It specifies the air interface, including the medium access control layer (MAC) and physical layer (PHY), of combined fixed and mobile point-to-multipoint broadband wireless access systems. This standard supports rapid deployment of broadband wireless access systems and encourages competition by providing alternatives to wireline broadband access.

References: The information is verified by the IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Broadband Wireless Access Systems1, and further details can be found in the IEEE 802.16 Working Group’s documents23.

 A TCP null scan attempt is a technique used in network scanning where the TCP packet sent has no flags set. This type of scan can sometimes penetrate through routers and firewalls that filter incoming packets based on certain flags because the absence of flags can prevent the packet from being filtered out. The TCP null scan is particularly useful for identifying open ports on a target system. If a port is open, the target system will not respond to the null scan, but if the port is closed, the system will send a TCP RST packet in response. This scanning method is not supported by Windows because Windows systems typically respond with a RST packet regardless of whether the port is open or closed, making it ineffective for distinguishing between the two states on those systems.

References: The TCP null scan’s ability to bypass certain types of filters and its behavior in response to open and closed ports are documented in various network security resources, including the Nmap documentation and other network security analysis articles12. These sources confirm the effectiveness of TCP null scans in penetrating through filters set up by routers and firewalls and their unsupported status on Windows systems.

Inline policies are exclusive to AWS IAM identities, which include users, groups, and roles. These are policies that you create and manage and are directly embedded into a single IAM identity. Unlike managed policies, which can be attached to multiple IAM identities, inline policies are strictly one-to-one; they are an integral part of the IAM identity to which they are attached. This means that if the user, group, or role is deleted, the inline policy is also deleted. Inline policies are typically used for ensuring that specific permissions are tightly bound to an IAM identity and are not inadvertently assigned elsewhere.

References: The information provided is based on the AWS documentation on IAM policies, which outlines the different types of policies and their use cases, including the unique characteristics of inline policies12. For the most accurate and detailed reference, it is recommended to consult the official documents and study guides from the Certified Network Defender (CND) course by the EC-Council.