Which one is incorrect about VLR ( )?
A. The VLR is a database that is maintained by an MSC.
B. VLR store temporary information about all subscribers.
C. VLR communicates with the HLR of the roaming subscriber to request data.
D. VLR maintain information about the subscriber’s current location in the network
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Back to the Figure 1 IP Integration Phases in Mobile Wireless, which statement on the below is incorrect ( )?
A. The first phase of these infrastructures based on circuit-switched voice and data services.
B. The second quadrant depicts the implementation phase of 3G technologies.
C. In the third phase, voice and data are consolidated onto a packet-based infrastructure from the RAN or radio network control (RNC) outward.
D. The fourth phase includes 3G services plus the implementation of IP-based radio and mobility components to develop a true end-to-end, all-IP wireless network solution.
Which standards of the “G” treat reliability factor as the hardest obstacle ( ) ?
A. 1G
B. 2G
C. 3G
D. 4G
Who sets those standards for real ( ) ?
A. Seller
B. Programmer
C. ITU-R
D. Government officer
Which one below is telling the truth ( ) ?
A. 1G A term already widely used before 2G was available.
B. Nothing new were added to the menu since 2G was appeared.
C. 3G should be capable of handling around 2 Megabits per second
D. 4G should be capable of handling around 2 Megabits per second
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