On Mac OS X, if you go to System Preferences -> Network -> Advanced -> DNS on the left is an area where DHCP DNS resolvers show up, or you can enter in your own to override any that your router is dishing out.
On the right is a large field for "Search Domains:".
I am sure there is an analogous field on Windows and Linux as well.
I have looked at google, and also the help pages, which do not say much...
Domains are searched in the order you list them, and the search stops when a valid name is found.
To search a name hierarchy, use search domains of varying scope. For example: building.campus.university.edu, campus.university.edu, university.edu.
Can someone explain to me, or point me to a link that explains what this field is for, and what benefits there may be by me learning different value to enter into it.
I am also curious if anyone has seen any noticeable gains by altering the value for the default MTU from 1500 on Mac OS X when communicating over wireless-N.