can someone please explain the source mac address

hankooknara

pc1 ----switch1

---

(e0)routera(e1)

---

switch2

---

pc2

Pratice test answers that source MAC pc2 will see(if pc1 wanted to talk to pc2), will be e0's mac address as source.. why not e1's source of router A?
I thought

when router A sees the packet to pc2, it has to do arp and then rebuild its ethernet trailer & header but source mac would be e1..

Can someone please explain this to me or point me to the URL?

agustinchernitsky

It should be the e1 MAC in the src field, since the router will create a new frame to send to PC2.

Check for errata on that question.

!30

Hey !

I'll try to get this one for you :

pc1 ----switch1

---

(e0)routera(e1)

---

switch2

---

pc2

When PC1 comunicate's with PC2 , PC2 will see like source address coming from PC1 e1 ( router ) MAC .
When PC2 comunicate's with PC1 , PC1 will see like source address cominng from PC2 e0 ( router ) MAC.

When PC1 per example send's the pachet to PC2 , it first get's from PC1 with PC1 MAC address like a source , it passes thourgh swtich1 unchanged and then routed thourgh e0 ( gw ) to e1 ( changes the source in MAC address or router e1 ) and so on PC2 saws router e1 MAC address.

Maybe you got the point now ?

darkuser

hmmmm
cant even answer their own questions .....