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

 The correct Wireshark filter to detect a SYN/FIN DDoS attempt is tcp.flags==0X029. This filter is designed to capture packets where both the SYN and FIN flags are set, which is an unusual combination and indicative of a SYN/FIN attack. In a typical three-way TCP handshake, the SYN and FIN flags are not set in the same TCP segment. A SYN flag is used to initiate a connection, and a FIN flag is used to politely close a connection. Therefore, seeing both flags set in the same packet suggests a possible SYN/FIN DDoS attack.

References: The answer is based on the standard behavior of TCP flags in network communications and the detection of anomalous flag combinations that signify potential DDoS attacks. While specific references to the EC-Council’s Certified Network Defender (CND) course materials cannot be provided here, the explanation aligns with the general knowledge of network security practices and the use of Wireshark for network analysis.

 Network Interface Cards (NICs) operate at the Physical layer of the OSI model. This layer is responsible for the actual physical connection between devices. It transmits individual bits from one node to the next and is involved in the electrical, mechanical, procedural, and functional aspects of activating, maintaining, and deactivating physical connections. It’s also where hardware like cables, switches, and NICs come into play.

References: The information provided aligns with the OSI model’s definition and the role of the Physical layer as described in networking literature and resources such as GeeksforGeeks and freeCodeCamp articles on the OSI model12.

The address 1080:0:FF:0:8:800:200C:4171 is an IPv6 address. IPv6 addresses are 128-bit identifiers for interfaces and sets of interfaces. In this case, the address includes a block ::FFFF: (or 0:FF), which is a reserved subnet prefix to facilitate IPv4 to IPv6 migration. This is known as an IPv4-mapped IPv6 address. It is used to represent an IPv4 address in an IPv6 address format. The last 32 bits of the address represent an IPv4 address, which in this case corresponds to 127.0.0.1 - the loopback address in IPv4 used to establish an IP connection to the same machine or computer being used by the end-user.

References: The explanation is based on standard IPv6 addressing rules and the specific structure of IPv4-mapped IPv6 addresses. The information is consistent with the ECCouncil’s Network Defender (CND) course objectives regarding understanding and analyzing network protocols and addressing12.