Click on the Apple menu on the top-left corner of the screen and select
System Preferences.

Click on the Network icon located on the
Internet & Network section.

After the Network Preferences window opens, click the pop-up
menu next to Show: and select Built-in
Ethernet
Click on the TCP/IP button.
Click on the pop-up menu next to Configure IPv4: and select
Manually.
Enter in the IP Address, Subnet Mask and
Router (sometimes called Gateway) that corresponds with
the
jack number in your office.
Note: If the Subnet Mask: and
Router are not editable, click on the PPPoE
button and uncheck Connect using PPPoE. Then go back to the
TCP/IP button.
In the DNS Servers: box, type 128.8.74.2
and 128.8.76.2.
In the Search Domains: box, type umd.edu.
Click on the Apply Now button.
