I have a question: Does the default getway router of the school use arp to transfer to the ISP router, same with the ISP router to the DNS server? I just thought if the datagram is encapsulated by a link layer protocol from the school to the ISP what would be the source MAC address , the MAC address from the laptop or the MAC address of the schools router. TIA =)
Each time the packet traverses a router, the link-layer header will be replaced and use a new source and destination MAC address. So when it reaches the ISP, the source MAC address will be from the upstream interface of the school's router. More detail in this video: ua-cam.com/video/w_2l9bsN4cE/v-deo.html
You are my life saver! Thank you for making all these videos. They are very clear and easy to understand.
Happy to hear that!
Helped Me For My Uni Exams. Thanks Mate. Appreciated
Very clear and concise, thank you!
Glad it was helpful!
Thank you for this video, with it it's really easy to connect all the dots and it's something that my prof missed in his lecture!
You're very welcome! Glad it is helpful!
This was great! Thanks
I have a question: Does the default getway router of the school use arp to transfer to the ISP router, same with the ISP router to the DNS server? I just thought if the datagram is encapsulated by a link layer protocol from the school to the ISP what would be the source MAC address , the MAC address from the laptop or the MAC address of the schools router.
TIA =)
Each time the packet traverses a router, the link-layer header will be replaced and use a new source and destination MAC address. So when it reaches the ISP, the source MAC address will be from the upstream interface of the school's router. More detail in this video: ua-cam.com/video/w_2l9bsN4cE/v-deo.html