Page 77 - M. Abrahim Thesis
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Computer Network 2021
Figure 3-22 shown a BPDU Communication
Figure 3-23 shown a BPDU Protocol Layout
Consequently, switches have five operating modes:
• Blocking—A port in blocking state sends and listens to BPDUs but does not forward
frames. By default, all ports are in blocking state when the switch is turned on.
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