Business Impact Analysis (BIA) is the process that determines the potential impacts of business function disruptions and gathers information needed to develop recovery strategies. A critical part of BIA is examining Recovery Point Objectives (RPOs) and Recovery Time Objectives (RTOs) for a disaster recovery strategy.
RPOs define the maximum age of files that must be recovered from backup storage for normal operations to resume after a disaster, while RTOs specify the maximum amount of time that a resource can remain unavailable after a disaster.
References: The role of BIA in examining RPOs and RTOs is a fundamental concept in disaster recovery and business continuity planning, which is covered in the EC-Council's Certified Network Defender (CND) curriculum. The importance of BIA in disaster recovery is also supported by industry best practices and guidelines12.

Explanation/Reference:

Explanation

Dsniff is a set of tools that are used for sniffing passwords, e-mail, and HTTP traffic. Some of the tools of Dsniff include dsniff, arpredirect, macof, tcpkill, tcpnice, filesnarf, and mailsnarf. Dsniff is highly effective for sniffing both switched and shared networks. It uses the arpredirect and macof tools for switching across switched networks. It can also be used to capture authentication information for FTP, telnet, SMTP, HTTP, POP, NNTP, IMAP, etc.
Answer option B is incorrect. Cain is a multipurpose tool that can be used to perform many tasks such as Windows password cracking, Windows enumeration, and VoIP session sniffing. This password cracking program can perform the following types of password cracking attacks:
Dictionary attack
Brute force attack
Rainbow attack
Hybrid attack
Answer options D and C are incorrect. These tools are port scan detection tools that are used in the Linux operating system.