NetworkActiv Scanner is a Cost effective, Fast, Easy to use, Advanced network scanner with many useful features. This is not just a network scanner, with this you can perform DNS dig, whois, and much more. No other network scanner compares to the performance, versatility, ease of use, and features of NetworkActiv Scanner... Main features are: TCP connect() scanning (standard TCP port scan), TCP SYN scanning (fast and "quiet" TCP port scan), Fast UDP port scanning with auto-speed control and reliable results, UDP sub-net scanning!, High speed ping scanning of sub-nets (UDP or ICMP), TCP sub-net scanning, Integrated fast trace-route, Remote OS detection: Ability to make an educated guess about the OS (Operating System) of a remote host, this is done by advanced TCP/IP stack fingerprinting, Wizard Mode: Walks you through step-by-step to perform network scanning, trace-route, and much more. This is very easy to use and learn, even by a beginner, Whois Client: Ability to perform whois with ease, you can eather specify a whois server, or have it attemp to determine a whois server automatically (works with most domains), DNS Dig system: Performs DNS dig quicky with ease, choose between TCP and UDP, specify a DNS server or have it attemp to determine the authoritative server automatically (works with most domains). Also, support for many RR's (Resource Records), Simple Port Scan Mode for easy and quick port scans, Nice looking interface, with multi-skin support, Tells you if remote computer being scanned is stealth, User setable max speed (ranging from 2 PPS to non-limited), Tells you the host responses for TCP connect() port scan and sub-net scan, Tells you the port use from huge lists of ports as found, Random order, reverse order, and "Only Scan Known Ports" scan capable, and much more.