Q: 5
Which of the following is a method of multiplexing data where a communication channel is divided into an arbitrary number of variable bit-rate digital channels or data streams. This method allocates bandwidth dynamically to physical channels having information to transmit?
Options
Discussion
C. no doubt here
C/D? D's a classic trap but pretty sure C fits with the whole dynamic allocation part.
I was thinking B here, since async TDM does adjust time slots based on traffic, so it feels like bandwidth could be dynamically assigned. Saw similar phrasing on a practice test. Might be mixing up statistical and async TDM though! If anyone's got the official guide handy, let me know if I'm off.
It's gotta be C for this one. Statistical multiplexing is the approach that handles variable bit-rate and allocates bandwidth only to channels with data to send. Saw similar wording pop up on practice exams lately. Pretty sure that's what they're asking for, but open to pushback if anyone thinks otherwise.
It’s C here. D is a common trap since FDM splits channels, but it’s not variable or dynamic like the question says. Seen similar wording on some practice sets. If you think it’s another option, check if "dynamic" is the key word-you’ll see C fits better.
A is wrong, C fits better here. Statistical multiplexing is what dynamically shares bandwidth for variable bit-rate streams, not fixed slots like TDM. Pretty sure C is what they're going for.
Definitely recommend checking the official ISC2 guide and trying some practice exams for questions like this. C
If the channels are async but not strictly dynamic, wouldn't B also fit here?
B
C tbh, A is tempting but static time slots trip people up on these.
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