The netstat -n command displays active TCP connections, but addresses and port numbers are expressed numerically and no attempt is made to determine names12. This option can be useful for checking the output in integer form, as well as for avoiding possible delays caused by name resolution12.
The netstat command without any parameters displays active TCP connections, but addresses and port numbers are resolved to their corresponding names, such as hostnames and service names12. This option can be less informative and more time-consuming than the -n option12.
The netstat -a command displays all active TCP connections and the TCP and UDP ports on which the computer is listening12. This option can be useful for checking the availability and status of ports, but it does not show the output in integer form12.
The netstat -e command displays Ethernet statistics, such as the number of bytes and packets sent and received12. This option can be useful for checking the network performance and utilization, but it does not show the network connections or their addresses and port numbers12.
Reference:
1: CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Tools and Troubleshooting
2: netstat | Microsoft Learn
3: 28 Netstat Commands {A Comprehensive List With Examples} - phoenixNAP
4: How to Use the Netstat Command - Lifewire