Skip to navigation menu

Skip to main content

Residential Communications
Teachers College, Columbia University
teachers college logo columbia univertsity logo
Residential Communication > Frequently Asked Questiions

Site Navigation

Residential Communication

Frequently Asked Questiions

Frequently Asked Questions

1. How much does a ResNet connection cost?

There is no additional fee for a ResNet connection; it is included in the rent.

2. What is an IP Address?

IP (Internet Protocol) is the standard way of regulating data transmission between computers on the Internet. An IP ADDRESS is the numeric address of a computer in the format used on the Internet. For example, the IP address of CUNIX is Each computer on the internet needs an IP address and your computer obtains one when you connect it to the wall jack.

3. I'm having trouble getting my ResNet connection to work. What should I do?

Check your Ethernet cable to be sure that it is working, them make sure that it is properly secured in the wall jack and at  your computer. Your Residential Consultant can also assist you.

4. Where in Teachers College can I connect with Wireless ?

Wireless network access is available throughout most of the Teachers College campus.  Check this link to See more info.

5. How can I check if the IP I'm currently using is over quota?

Users can check if the IP they are currently using is over quota by going here:

6. How do I find the Ethernet and Wireless MAC (Physical Address)?

The Physical address is exactly 12 hexadecimal numbers. Any leading zeroes are significant and must be entered. You can also obtain the hardware address by doing the following:
For PC/Windows 2000/XP:
Click on the  Start button, choose Run, and  type cmd. This will bring you up to a dark DOS window. Type ipconfig /all.

C:\Documents and Settings\class> ipconfig /all
                     Ethernet adapter Local Area Connection:
                     Physical Address. . . . . . . . . : 00-00-F4-DA-1E-19
                     IP Address . . . . . . . . . . . . :    160.39.xx.yy
                     Default Gateway . . . . . . . . . : 160.39.xx.1

Your Ethernet Hardware Address should appear in the Physical Address field. You may also consult the CUIT Internet Connection Guide for Windows XP at or ask your Residential Consultant.

For Windows 7:
Click start, Type "cmd" at the area of the blinking cursor. At the DOS prompt,. Type ipconfig /all.  or getmac .


For Mac OS X Computer:
From the Apple pull-down menu, choose System Preferences -> Network select Built-In Ethernet from the Show: Choose Ethernet, the 12 digit Hardware Address will show in the field. Consult the CUIT online guide:,