Is the following description correct? The goal of ATM, that is, the biggest feature of ATM, is to achieve the best network resource utilization for any form of business distribution. To achieve this goal, statistical multiplexing of network resources is necessary.

What is the difference between alarm shielding and alarm suppression?

The FTP, TFTP, or SFTP mode can be used to transfer files during the upgrade of the access network. The FTP mode is recommended.

In the UA5000 chassis with PVM as the main control board, which statement about the user board is correct?

Is the following description correct? VDSL2 provides uplink and downlink symmetrical/asymmetrical transmission rates on a pair of twisted pairs. The transmission distance is about 3km. The maximum downlink rate is 52M (symmetrical rate) and the maximum uplink rate is 12M (asymmetrical rate).