All Ethernet interfaces are equal in their ability to send frames onto the network. No one gets a higher priority than anyone else, and democracy reigns. This is what is meant by Multiple Access. Since signals take a finite time to travel from one end of an Ethernet system to the other, the first bits of a transmitted frame do not reach all parts of the network simultaneously. Therefore, it's possible for two interfaces to sense that the network is idle and to start transmitting their frames simultaneously. When this happens, the Ethernet system has a way to sense the collision of signals and to stop the transmission and resend the frames. This is called Collision Detect. All Ethernet interfaces are equal in their ability to send frames onto the network. No one gets a higher priority than anyone else, and democracy reigns. This is what is meant by Multiple Access. Since signals take a finite time to travel from one end of an Ethernet system to the other, the first bits of a transmitted frame do not reach all parts of the network simultaneously. Therefore, it's possible for two interfaces to sense that the network is idle and to start transmitting their frames simultaneously. When this happens, the Ethernet system has a way to sense the collision of signals and to stop the transmission and resend the frames. This is called Collision Detect.

सीएसएमए / सीडी प्रोटोकॉल कार्यों कुछ एक डिनर पार्टी की तरह एक अंधेरे कमरे में. टेबल के आसपास हर कोई चुप की अवधि के लिए (कैरियर नब्ज) बोलने से पहले सुनना चाहिए. एक बार एक स्थान होता है हर एक समान कुछ (मल्टीपल एक्सेस कहने का मौका दिया है). अगर दो लोग एक ही पल वे उस तथ्य का पता लगाने में बात करना शुरू करो, और (टकराव की जांच बोल छोड़ दिया.)