Technical Configuration Requirements and Guidelines


Use the following technical configuration requirements and guidelines to prepare your computers and network to administer iBT exams. This information applies to computers running all components of the testing system: LSCP (cache proxy), administrative station and testing workstations unless stated otherwise.


You may require assistance from the local technical staff at your test center to implement these computer and network configurations. Contact the helpdesk/technical support for any questions or concerns regarding the information below.


1. Computer Requirements: Please refer to the CTAS Facility Requirements posted on the ETS CTAS website ( for the hardware, software, and connectivity specifications. Hosting the LSCP does not require a computer running a server operating system. The operating system should reside on and boot from the computer?s local hard disk. Virtual machines and thin clients are not supported.


2. Administrative Privileges: Administrative privileges are required to install and operate the iBT software on each computer. Users running Windows 7or Windows 8 must set User Account Control to NEVER NOTIFY.


3. Windows User Account/Login: The iBT software applications can be launched via desktop shortcuts. These shortcuts are specific to the user?s Windows profile. If a different Windows account is used, the iBT shortcuts will not appear on the desktop. To create shortcuts for a different user, launch the iBT application using the Internet accessed URLs.


4. Prepare Internet Explorer: Internet Explorer Internet Security should be configured at Medium level or lower.


5. Desktop Firewalls: We strongly recommend that desktop security firewalls (Internet Security Suites or Windows built-in firewalls) should be disabled or configured to allow unrestricted network communication between computers running the Administrative Station, LSCP, and Testing Workstation applications.


6. Other Desktop Security Configurations: Desktop security systems, such as Centurion Guard, Deep Freeze, Drive Shield, Clean Slate, Fortress, and similar products, control which software can permanently reside on the computer hard drive by erasing a software installation after a system reboot or at a scheduled time. DISABLE such security configurations on the LSCP computer. Not disabling such security configurations will result in loss of candidate test responses. In addition, disable such configurations on all testing workstations prior to iBT test delivery.


7. LAN Communication: All test delivery computers MUST reside on the same subnet of the LAN with NO blocking of any TCP ports. Use network switches (do not use hubs) that support 100 Mbps or higher on the LAN.


8. WAN Communication: All test delivery computers MUST have broadband Internet connectivity. Each computer may utilize up to 50 Kbps of Internet bandwidth.


9. LAN-WAN Separation: If your Local Area Network (LAN) is configured in a way that LAN connectivity is interrupted when you lose Internet connectivity, you should consider alternative devices or configurations to prevent this by isolating the LAN device (network switch) from Wide Area Network device (Internet router) for your testing facility or lab. Isolating the LAN device will allow you to continue to deliver tests that are already launched in the event the Internet connectivity is lost. However, a new test launch or a restart will require Internet connectivity to be restored.


10. Network Firewalls: Test centers that access the Internet via firewalls or proxy servers should ensure:

a. TCP ports 443 and 80 are open.

b. must be added as a trusted domain to allow file download/upload without content filtering.

Note: Do not use a fixed IP address in place of for trusted sites.

c. Download of files with extension types EXE, JAR, JNLP, XML, and DLL must be allowed.


11. LSCP Computer IP Address: Configure the LSCP computer either by assigning it a fixed IP address or by configuring your DHCP Server(s) such that the lease renewal process assigns it the same IP address as it had prior to renewal. DO NOT run desktop security applications such as ESET or Kaspersky in a way that would result in masking the cache proxy IP address as it will prohibit network communication between administrative stations, LSCP, and testing workstations.


12. Multiple LSCP Configurations: All test delivery computers that are launched for a unique test center ID or site code and reside on the same subnet must be located near each other because they are part of one test delivery system. If the physical locations are different, then each delivery system must reside on a different subnet in order to use the same test center ID (site ID).


13. Regional Settings/Options: iBT requires that all computers? Regional Options/Settings and Keyboard Input Locale are configured for U.S. English. The software checks for these settings before launching. Ensure that Regional Options/Settings for U.S. English are installed and that the default keyboard locale is set to U.S. English.


14. Non-U.S. English Computer Names: DO NOT use non-U.S. English characters for computer names.


15. Configure Power Options: All test delivery computers? Power Schemes should be configured so that the hard disk and monitor stay ON and the systems do not go into hibernation or standby mode.


16. Configure Desktop Screen Savers: All test delivery computers? Desktop Screen Savers should be disabled.


17. Configure Instant Messenger Services, such as MSN Messenger or similar applications, in such a way that they do not run automatically at the time of startup or login to Windows. Running these applications may not allow you to launch iBT on the testing computers.


18. Video Display Colors: iBT software requires the display adapter to be set for 32-bit colors.


19. Wide Screen Monitors: Wide screen monitors must support an aspect ratio of 4:3.


20. Headsets and Audio Test: Always use iBT certified headsets to ensure good quality audio response recording. While preparing test stations, run the Verification Tool Audio Recording and Playback test and ensure the audio playback quality is good.


21. iBT Software Installer: iBT requires a specific version of the Java Runtime Environment and other software components, which can be downloaded from the following link: Download the iBT Bundle Installer from this link onto your computer hard drive and install as an administrator. Reboot the computer after the installation is complete.


22. Screen Magnification Software: Install ZoomText software from the following link: to test candidates who have been authorized to use the screen magnification and/or modifiable colors (color switching) accommodations. The ZoomText software is currently supported on Windows 7 only (do not install/operate it on Windows 8).


23. Positioning LSCP and Administrative Station: The administrative station should be located near the testing workstations, preferably inside the testing room near the entrance or just outside the entrance. This allows for good flow when staff are checking-in test takers at the admin station and escorting them to their assigned testing stations. It is acceptable for the LSCP to be located in another room, but it should be nearby so the Test Center Administrator can access it easily.


24. Hardware or Software Changes: Whenever a testing computer?s hardware or software is changed or upgraded, you are required to run the Verification Tool tests and Round Trip demo tests at least a day before your next test administration date to verify that everything is working as expected after changes are applied.



Revised on September 10, 2014