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With a leased line, there are two common types of schemes that allow multiple logical signals to share a single physical channel. These technologies are referred to as _________ and _________.
TDM
HSRP
Redundancy
STDM
VRRP
Time-division multiplexing or TDM is a physical layer concept. It is a method of putting multiple data streams in a single signal by separating the signal into multiple segments having a very short duration. These data streams are reassembled at the receiving end based on the timing. Statistical Time Division Multiplexing or STDM is another method like TDM developed to overcome the inefficiency of TDM. In STDM, however, statistics are analyzed related to the typical workload of each input device and determines. It uses variable time slot length that allow channels to compete for any free slot space.
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