Netstat is truly a very overlooked tool for network troubleshooting so I believe that it would be beneficial to post all of the switches and options available with NETSTAT.
Netstat displays protocol statistics and current TCP/IP network connections.
Netstat can be run in any version of Windows by opening a Command window and using the following:
NETSTAT [-a] [-b] [-e] [-n] [-o] [-p proto] [-r] [-s] [-v] [interval]
-a Displays all connections and listening ports.
-b Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in the [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.
-e Displays Ethernet statistics. This may be combined with the -s option.
-n Displays addresses and port numbers in numerical form.
-o Displays the owning process ID associated with each connection.
-p proto Shows connections for the protocol specified by proto; proto may be any of: TCP, UDP, TCPv6, or UDPv6. If used with the -s option to display per-protocol statistics, proto may be any of: IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6.
-r Displays the routing table.
-s Displays per-protocol statistics. By default, statistics are shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6; the -p option may be used to specify a subset of the default.
-v When used in conjunction with –b, will display sequence of components involved in creating the connection or listening port for all executables.
interval Redisplays selected statistics, pausing interval seconds between each display. Press Ctrl+C to stop redisplaying statistics. If omitted, netstat will print the current configuration information once.
I have attached this as a file below so you can download and print it.