Here are the list of Network commands in Unix

ping command in unix
ping host – ping host and output results

whois domain – get whois information for domain
dig command in unix
dig domain – get DNS information for domain
dig -x host – reverse lookup host

wget command in unix
wget file – download file
wget -c file – continue a stopped download

To know list of other commands, here are the list of tutorials

For unix shortcuts, visit Unix shortcuts

Learn about other top Unix Tutorials in the Unix Command Reference