Network Time Protocol (NTP) Service

(Portions adapted from an OIT KnowledgeBase page.)

Network Time Protocol (NTP) Service allows devices to set their date/time clock to a known-good clock, and to keep their clock synchronized with a high degree of accuracy.

CS provides several NTP servers for use by devices attached to the campus network.

At the time of this writing, the NTP service we provide supports version 4 of the Network Time Protocol, and provides backward-compatibility with version 1, version 2, and version 3.

Remote Desktop Protocol (RDP), VNC, and other Remote Desktop Access Software

Microsoft's remote desktop protocol (RDP), virtual network computing (VNC), and other remote desktop access software allow users to remotely control another computer. Popular uses of the technology include remote technical support, and accessing files on one's work computer from one's home computer, etc. The software transmits the keyboard presses and mouse clicks from one computer to another relaying the screen updates back in the other direction, over a network.

Virtual LANs (VLANS)

A virtual LAN, commonly known as a vLAN or as a VLAN, is a method of creating independent logical networks within a physical network. Several VLANs can co-exist within such a network. This helps in reducing the broadcast domain.

OIT Network Connections

The Princeton University campus network is connected to both the Internet (a world-wide collection of inter-connected networks that all use the TCP/IP protocols) and to Internet 2 (a consortium of over 207 universities working in partnership with industry and government to develop and deploy advanced network applications and technologies). The connections to the Internet and I2 provide the campus with a vast array of services and information including access to the world-wide web and electronic mail.

Internet 2

Princeton University is a member and participant in Internet 2 which is a very high-speed network supporting communication and research among I2 members. Many educational, government, and research organizations are members of Internet 2. Internet 2 is similar in structure to the Internet (both use TCP/IP), but I2 provides significantly higher communication speed end-to-end which improves service and enables new applications.

File Transfers

From time to time, you may need to get one or more files into or out of the department. This file transfer can be done in a few different ways, some secure, and some not. The recommended method of transferring a file is to either use an encrypted mechanism, or one that does not require you to enter a username and password. The preferred method is to use scp / sftp, which is part of the SSH suite of programs.

CS Department Firewall

The CS Department runs a firewall to protect internal hosts from unwanted external network traffic. Due to the nature of firewalls this can sometimes cause problems for some applications or services that reside behind the firewall. If you are experiencing a problem that you believe is caused by the firewall please contact and we can work with you to find a solution. By default we block all incoming network ports from outside the department into those network subnets where we place personal workstations.

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