Final answer:
SolarWinds Network Mapper is designed for generating network topology maps and is the tool most suited for passively gathering the required information.
Step-by-step explanation:
To answer the question about tools for passively gathering information required to generate a network topology map: among the tools listed, SolarWinds Network Mapper is specifically designed to create network topology maps. Tools like Wireshark and Nessus are not primarily used for mapping but for capturing and analyzing network traffic and conducting security assessments, respectively. While nmap can perform host discovery and service enumeration, its typical use is more active scanning rather than passive.