Understanding Slotted Aloha Protocol

What is Aloha?

• A random access protocol designed for wireless LAN

• A controlled access protocol

• A channelization protocol

• A protocol for wired networks

What are the two types of Aloha?

• Pure Aloha and Slotted Aloha

• Random Aloha and Controlled Aloha

• Slotted Aloha and Channelized Aloha

• Pure Aloha and Controlled Aloha

How does slotted Aloha improve efficiency?

• By allowing data sending only at the beginning of time slots

• By allowing data sending at any time

• By reducing the number of stations

• By increasing the collision duration

What happens if a station misses the allowed time slot?

• It must wait for the next time slot

• It can send data anytime

• It loses the chance to send data

• It can send data in the current slot

In slotted Aloha, when can the sending of data occur?

• Only at the beginning of time slots

• At any time during the slot

• Only at the end of time slots

• Whenever a station has data

What is the vulnerable time in slotted Aloha?

• Frame transmission time

• Time slot duration

• Collision duration

• Data sending time

What happens if a station misses out the allowed time?

• It can send a frame immediately.

• It must wait for the next time slot.

• It can send a frame at any time.

• It will lose the opportunity to send.

How does the throughput formula for slotted Aloha differ from pure Aloha?

• It is G into e power minus G.

• It is G into e power minus 2G.

• It is G into e power minus 3G.

• It is G into e power minus G squared.

What is the maximum throughput in slotted Aloha for G equal to 1?

• 0.184

• 0.368

• 0.5

• 0.25

What is the main advantage of slotted Aloha?

• Simplicity in implementation.

• Reduces the number of collisions to half.

• Higher throughput than pure Aloha.

• Allows continuous transmission.