Free Subnet Calculator from Solarwinds generates all subnets with real-time DNS, PING and CIDR tests. This networking tool performs DNS resolution, address translation, supports CIDR and Address Class information. It calculates subnets based on Subnet Mask, Mask Bits, Host Bits, Number of Subnets and Hosts per Subnet. It can even generate reports. The Advanced Subnet Calculator from SolarWinds is the industry leader and FREE.

• License: Freeware
• Language: English
• Release: 2007-10-08
• Size: 9 Mb
• Cost: Free

The Advanced IP Address Calculator is a freeware Windows 95/98/NT/2000/XP utility that lets you to calculate every aspect of your subnet configuration in a few mouse clicks! It was designed for any network engineer who needs a fast way to determine subnets.

• License: Freeware
• Language: English
• Release: 2004-07-01
• Size: 272 Kb
• Cost: Free

NetworkActiv Port Scanner is a freeware, 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, remote OS fingerprinting, trace-route, ping, and much more.

• License: Freeware
• Language: English
• Release: 2006-07-09
• Size: 1 Mb
• Cost: Free

Multi-threaded TFTP server used to upload/download executable images and configs to routers and switches. It runs on most Microsoft® operating system, including Windows® XP, Vista, 2000, and 2003. While there are other free TFTP servers available, SolarWinds TFTP Server is the most robust, widely-trusted and, easy-to-use solution that helps network engineers with projects ranging from single file transfers to large network auditing projects.

• License: Freeware
• Language: English
• Release: 2007-10-08
• Size: 6 Mb
• Cost: Free

Professional Toolset is an arsenal of over 30 Network Discovery, Monitoring and Management tools. Installs in seconds and allows you to be producing reports in minutes. Monitor traffic on a router with BANDWIDTH MONITOR, generate a detailed Network Inventory with IP NETWORK BROWSER, have the NETWORK MONITOR email you when a server fails. Additional tools: MAC ADDRESS DISCOVERY, DNS AUDIT, MIB WALK, PROXY PING, ROUTER CONFIG VIEWER, and many more.

• License: Shareware
• Language: English
• Release: 2006-04-24
• Size: 916 Mb
• Cost: 445.00 $

Ping Scanner Pro has 18 network tools, it can ping one address a lot of times or a lot of addresses one time. It will also tell you what MAC addresses are on your subnet, and perform DNS lookup or reverse DNS lookup. It does Traceroute, Whois, subnet calculation, Port scanner, troughput test and many more. The results can be saved as CSV, Ascii, DOC or XLS or printed out. further Finger, troughput test, subnet calculator, open connections, an

• License: Shareware
• Language: English
• Release: 2002-03-19
• Size: 1 Mb
• Cost: 39.00 $

SemSim Cisco CCNA subnetting tutorial & practice questions. Subnetting is explained with examples. Learn to subnet and understand concepts such as subnet mask and ip addressing. The tutorial is follwed by a subnetting quiz to test your understanding. Post assessment exercises after the course gives you hands on practice. Topics covered include: define subnet and subnet masks, IP subnetting math, Network & private addressing

• License: Shareware
• Language: English
• Release: 2004-09-23
• Size: 3 Mb
• Cost: Free