When a Layer 2 Ethernet switch receives an ingress frame, it processes the header information in a specific sequential order. Place the steps taken by the switch into the correct chronological order from first to last.
- 1The switch receives an Ethernet frame on an ingress switch port.
- 2The switch inspects the source MAC address and adds or updates the entry in the MAC address table with the ingress port.
- 3The switch inspects the destination MAC address and searches for a matching entry in its MAC address table.
- 4The switch forwards the frame out the matching destination port, or floods it out all ports in the VLAN except the ingress port if unknown.
Cevap
The correct order of switch operation is: 1) The frame arrives on an ingress port, 2) The switch learns or updates the source MAC address and port mapping in the MAC address table, 3) The switch performs a table lookup for the destination MAC address, and 4) The switch forwards or floods the frame out the appropriate port(s).
A Layer 2 Ethernet switch always follows a standard pipeline: frame reception on ingress, source MAC learning and table updating, destination MAC address lookup, and finally executing unicast forwarding or VLAN flooding.
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Anahtar Kavram
Layer 2 Frame Ingress Processing and MAC Table Pipeline