16. A war-dialing tool provides: 16.1 A list of Web servers; 16.2 A list of installed protocols; 16.3 A list of all nodes to the destination; 16.4 A list of discovered telephone lines with modems. 17. Finding a live host is based on: 17.1 Traceroute utility; 17.2 Ping utility 17.3 Redirect utility; 17.4 Find a host utility 18 For learning network topology: 18.1 Traceroute 18.2 Ping; 18.3 HTTP protocol; 18.4 FTP protocol is used. 19. A network-based IDS captures: 19.1 All data on the LAN; 19.2 Only viruses; 19.3 Only programs; 19.4 Only malicious program. 20 The tiny fragment attack: 20.1 Designed to overload network with many small fragment; 20.2 Designed to suppress all small packets; 20.3 Designed to fool the IDS by creating very small packet; 20.4 Designed to generate only small fragments