Encapsulation and decapsulation

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First of all, thank you for the precious content, I cannot grasp the concept of encapsulation when it comes to layer 2 header creation before sending info, since a MAC address should be written in this phase based on the destination IP address from the upper layer, especially when the destination IP belongs to a different subnet while the ARP service of the connected device cannot retrieve the MAC address

@Ali-Musa said in Encapsulation and decapsulation:

First of all, thank you for the precious content, I cannot grasp the concept of encapsulation when it comes to layer 2 header creation before sending info, since a MAC address should be written in this phase based on the destination IP address from the upper layer, especially when the destination IP belongs to a different subnet while the ARP service of the connected device cannot retrieve the MAC address

I started to type this all out but realized I have a more comprehensive explanation that Wes and I did in the older but still useful CCENT show: https://app.itpro.tv/course/ccent-updated-2018/understandapplyosi-model2-ci

thank you sir