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Archive for the ‘Networking’ Category

Active ports – monitoring ports

01.16.2009 · Posted in Networking, Tools

An alternative to netstat command and it’s graphical too! This is a great tool that allows you to monitor what tcp or udp ports are opened in your local machine. You can use it to find out what ports are being used by what applications. It displays a local and remote IP address along with ...

Troubleshooting TCP/IP

12.03.2008 · Posted in Networking

Before troubleshooting any connection issue, you need to know about these facts The following table lists the default IP addressing classes and masks: Class Address Range Default Mask A 1.0.0.0 to 126.255.255.255 255.0.0.0 B 128.0.0.0 to 191.255.255.255 255.255.0.0 C 192.0.0.0 to 223.255.255.255 255.255.255.0 D 224.0.0.0 to 239.255.255.255 (multicast addresses) E 240.0.0.0 to 255.255.255.255 (experimental addresses) ...