Figure 35 Hosts

Figure 3-6. Host Transmission

1. Suppose host A begins transmitting a frame at time t (see Figure 3-6).

Figure 3-6. Host Transmission

Figure 3-7. Calculation of Transmission Time

It takes one link latency, denoted as d, for the frame to reach host B. It could be stated that the first bit of A's frame arrives at B at time t + d, as shown in Figure 3-7.

Figure 3-7. Calculation of Transmission Time

2. Suppose an instant before host A's frame arrives, host B begins to transmit its own frame (see Figure 3-8), illustrated here as t-1. Host B will see the segment as idle because there is no traffic on the wire.

Figure 3-8. Multiple Transmissions

Figure 3-8. Multiple Transmissions

B's frame will immediately collide with A's frame, and this collision will be detected by host B (see Figure 3-9).

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