How does port knocking work?Select one:a.By requiring users to send a specific sequence of packets to a series of open ports in order to access a specific portb.By requiring users to send a specific sequence of connection attempts to a series of closed ports in order to access a specific portc.By requiring users to send a specific sequence of connection attempts to a series of open ports in order to access a specific portd.By requiring users to send a specific sequence of packets to a series of closed ports in order to access a specific port

What is the primary purpose of port knocking?Select one:a.To allow only authorized access to specific ports on a target hostb.To obscure open ports on a target hostc.To gather information about the services running on a target hostd.To gather information about the network topology of a target host

Which of the following is NOT a limitation of using port knocking?Select one:a.It requires the use of additional software or protocols to implement and manage the port knocking sequenceb.It may not work with all types of firewall rules or network configurationsc.It provides complete anonymity and cannot be traced back to the sourced.It can be complex to set up and configure, especially for large networks or multiple target hosts

What is the purpose of a port scan in ethical hacking? To identify open network ports To exploit vulnerabilities in network services To gain unauthorized access to a system To perform a denial-of-service attack

Which of the following responses from a firewall indicates that a port is open and actively listening for connections?Select one:a.RSTb.FINc.SYN-ACKd.ACK

In the context of network security, port scanning is a technique used by both security professionals and potential attackers to identify open ports on a networked device. Why is port scanning considered a critical preliminary step in the reconnaissance phase of a cyber-attack? Group of answer choicesIt facilitates the encryption of traffic between the attacker and the target device, ensuring the attacker's activities remain undetectedIt directly provides the attacker with administrative access to network devices by exploiting default port configurations.It allows the attacker to overload the network device by opening too many connections, causing a denial of service.It enables the identification of active services and potential vulnerabilities associated with open ports on the target device.