What is the Media Access Method Used by Ethernet
1. Giới thiệu
– Briefly introduce Ethernet as a widely used technology for local area networks (LANs).
– Explain that Ethernet utilizes a specific media access method to control access to the network.
2. Definition of Media Access Method
– Define media access method as the set of rules and procedures that govern how communication devices access a shared network medium.
– Explain that media access methods determine how devices share the available bandwidth and avoid collisions.
3. Explanation of Ethernet’s Media Access Method
– Discuss that Ethernet uses a contention-based media access method called Carrier Sense Multiple Access with Collision Detection (CSMA/CD).
– Describe how CSMA/CD operates:
– Devices listen to the network medium before transmitting to ensure it is idle (Carrier Sense).
– If multiple devices try to transmit simultaneously, a collision is detected (Collision Detection).
– Colliding devices stop transmission and wait for a random time before retrying.
– Highlight that CSMA/CD allows devices to share the available bandwidth fairly and efficiently.
4. Advantages of CSMA/CD in Ethernet
– Explain that CSMA/CD allows Ethernet to support multiple devices and provide flexible network configurations.
– Discuss that CSMA/CD can dynamically adapt to changing network conditions, such as adding or removing devices.
– Mention that CSMA/CD is a robust and widely adopted media access method in Ethernet.
5. Limitations of CSMA/CD in Ethernet
– Acknowledge that CSMA/CD has certain limitations, such as the potential for collisions and decreased efficiency with increasing network traffic.
– Explain that CSMA/CD becomes less effective in larger networks or when the network load is high.
– Mention the introduction of Ethernet switches, which mitigate collisions and improve network performance.
6. Phần kết luận
– Recap that Ethernet, as a popular LAN technology, employs the CSMA/CD media access method.
– Emphasize the benefits of CSMA/CD in allowing fair and efficient sharing of network resources.
– Discuss that advancements in Ethernet technology, such as the use of switches, have addressed some limitations of CSMA/CD.
– Conclude by highlighting the ongoing evolution of Ethernet and its continued relevance in modern networking.
