- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Distinguish between Pure ALOHA and Slotted ALOHA
Pure ALOHA
Pure ALOHA is an unslotted, fully-decentralized protocol. It is extremely easy and trivial to execute. The basic form is - "when you want to talk, just talk!" So, a node that wants to transmit will go ahead and send the packet on its communication channel, with no consideration whatsoever as to whether anybody else is transmitting or not.
Slotted ALOHA
In the slotted ALOHA, stations are enabled to send frames in slots only. If longer than one station transmits in a similar slot, it will generate a collision. This reduces the appearance of collisions in the network system. Here, every station has to maintain the record of the time slot. The process of transmission will be initiated by any station at the beginning of the time slot only.
Comparison
The major differences between Pure ALOHA and Slotted ALOHA are as follows−
| Pure ALOHA | Slotted ALOHA |
|---|---|
| Pure ALOHA was introduced by Norman and his associates at the University of Hawaii in 1970. | Slotted ALOHA was introduced by Roberts in 1972. |
| In pure ALOHA, whenever a station has data to send, it transmits it without waiting. | In slotted ALOHA, a user waits till the next time slot begins to transmit the data. |
| The frames are transmitted at arbitrary times. | The time is divided up into discrete slots, and the frame is sent at the start of the slot. |
| The performance is given by S = Ge−2G | The performance is given by S = Ge−G |
| Due to the very low utilization factor, it cannot be used for satellites. | It is used in broadcast satellites. |
| It does not require global time. | It requires global time synchronization, as it is divided up into discrete slots. |
| The maximum utilization is about 18%. | The maximum utilization is about double that of Pure ALOHA, i.e., 37%. |
| The implementation is very simple. | The implementation is complex due to the synchronization of all the stations. |
- Related Questions & Answers
- Differences between Pure Aloha and Slotted Aloha
- Slotted ALOHA
- Pure ALOHA
- What is slotted ALOHA in computer networks?
- What is Pure ALOHA in computer networks?
- ALOHA Protocol in computer network
- Distinguish between entrepreneurship and management.
- Distinguish between profitability and liquidity.
- Distinguish between GST and SST
- Distinguish between EBIT and net income.
- Distinguish between active and passive investment.
- Distinguish between the TCP and UDP.
- Distinguish between contingent liabilities and provisions
- Difference Between Virtual and Pure Virtual Function
- Distinguish between period cost and product cost.