Answer / guest

Answer: D

Repeaters work at the Physical layer of the OSI model by
regenerating

the signal to extend the distance it can travel.

Answer / harsh singh

repeater works on physical layer

Answer / kunal

Repeaters work at the Physical layer of the OSI model by
regenerating the signal to extend the distance it can travel.
But it depends on which type of repeater it is sometimes it
works on network layer also.

Answer / mhd mirshad

D : Physical Layer

Answer / gaikwad bhanudas

Physical

Answer / r. hatman

Physical (L1), because if it would work at Network layer,
then it would in effect be a Router.

From software/firmware perspective I would guess that
typically device which is configured (or is limited just) to
be a Repeater, will forward anything it receives from L1
receive (callback) function to the L1 send function. This
can also be a loop back built into the L1 module or
technically L1 module can be without it and data is looped
back at some higher layer but in effect this is still a L1
function. Often this has to be implemented as a
"store-and-forward" system, since you cannot often both send
and receive to same media at the same time.

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