Which random access protocol uses equal-sized slots and assumes synchronized nodes?

nodes start to transmit only at slot beginning

in ALOHA if 2 or more nodes transmit in slot, all nodes detect collision

Which random access protocol has a maximum efficiency of 18%?

node can send new frame in next slot

Slotted ALOHA

slotted ALOHA is not decentralized

In CDMA, how are different nodes distinguished from each other?

slotted ALOHA’s max efficiency is

no synchronization

What is the advantage of slotted ALOHA over pure ALOHA?

Which random access protocol has a higher maximum efficiency: Slotted ALOHA or pure ALOHA?

collision probability …. with no synchronization

defer transmission

requires one master node to poll each of the nodes in a round-robin fashion.

CSMA with collision detection

collision detection … in wired, … with wireless

colliding transmissions aborted, reducing channel wastage

"invites" other nodes to transmit in turn.

… play role in in determining collision probability

If NIC senses channel: if…: start frame transmission