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i am ccna certified.Password Cracking Attacks: This type of attack involves getting a hash of the password and then converting it to the original password in plain text. To perform such an attack, the attacker needs to use certain tools, such as an extractor to guess the hash, a rainbowtable to look up plaintext passwords, and a passwordsniffer to extract authentication information. possible passwords and their hashes in a given system and puts the result into a lookup table called "rainbowtable". This way, the attacker can get the hash value from the victim's system and then put it in the rainbow table to search for that hash value to get the plaintext password. To deter rainbow table attacks, you need to disable LM hashes and use long, complex passwords.Password sniffing attack: This is where the threat maker first grabs the authentication packet transmitted between the client and the server, and then extracts the password hash or enough authentication information to perform password cracking. Password logging attacks: Such attacks generally have to rely on password loggers or Trojan horses. 13.2.13 Wireless Attacks Several attacks against wireless networks are shown below. Installation of rogue access points (APs): A common technique is for an attacker to install an AP that acts as a back door to access the network and all systems within the network.Interference with wireless signals: The purpose of this type of attack is to completely or partially disable the wireless network, resulting in a full or partial DoS attack. Evil twin attack (eviltwinattack): A highly lethal attack on WLAN infrastructure. The basic idea of this attack is to deploy a "twin" AP controlled by the attacker near the attacked WLAN network.The attacker "drives" all the way to scan and discover the wireless APO is named "driving attack" because the attacker can "drive" along and obtain a large number of SSIDOs in a very short period of time. Driving" along the way to obtain a large amount of wireless network information. Bluejacking attack: An attacker actively sends messages to other devices via Bluetooth.IV attacks: An attacker modifies the initialization vector (IV) of a wireless packet that has been encrypted during transmission. The attacker does so in order to obtain a large amount of information related to a single unencrypted packet and to generate another encryption key with which to encrypt other wireless packets with the same IV.WEP/WPA attacks: Both WEP and multiple versions of WPA are vulnerable to a variety of vulnerabilities that are insufficient to combat the attack.WPS attacks: Attackers can use WPS password guessing tools to perform these attacks, with the goal of obtaining the WPS password and using it to access the network and the data within the network.