Internet Group Management Protocol (IGMP)




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The Netstat –b option


The Netstat tool displays a variety of information about active TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, and IPv4 and IPv6 statistics. In Windows Server 2003 Service Pack 1, the Netstat tool supports a new –b option that displays the set of components that are listening on each open TCP and UDP port.

With Windows Server 2003 with no service packs installed, you can use the –o option to display the set of ports being listened on and the corresponding process ID (PID). You can then lookup the PID in the display of the tasklist /svc command to discover the name of the process that owns the port. However, in some cases, there are multiple services within a single process and it is not possible to determine which service within the process owned the port.

With the –b option, Netstat displays the TCP or UDP port, the file names corresponding to the components of the service that owns the port, and the PID. From the file names and PID, you can determine which of the services in the display of the tasklist /svc command owns the port.



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Internet Group Management Protocol (IGMP)

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