If you are using special ports or different usernames on different ssh-hosts you can simplify your connect commands with a .ssh/config file like the one in the following example.
Host test1
HostName 8.8.8.8
Port 12345
User myname
Host test2
HostName fubuntu
User horaz
Host *
User root
ssh test1 equals ssh myname@8.8.8.8 -p 12345. The last entry lets you use root for all other hosts.