Imagine that Computer Z generates a layer-3 packet that is intended to be send to Computer Y. In order to send the packet, Computer Z first embeds the packet into a data-link layer frame and then sends the frame over the network. Switch G eventually receives Computer Zs frame. The frame is an Ethernet frame with a source and destination MAC address fields in its header among other fields. Does the destination MAC address field contain the MAC address of Switch G or the MAC address of Computer Y? Explain your answer in detail.

5. Now imagine that Switch G and Switch H were replaced with layer-3 routers. With that in mind, answer the sub-questions below.

a. If Switch A were to receive a data-link layer frame broadcasted by Computer Y, the computers on which LANs would receive that broadcast? Explain your answer in detail.

b. If Computer Z intends to send a layer-3 packet specifically to Computer Y, would it be able to address the data-link layer frame with Computer Ys MAC address? Explain your answer in detail.

c. Suppose that a total of few hundred employees work in Building 1 and Building 2 with many more

LANs than what is illustrated in the diagram. What would be the advantages and disadvantages of this

new configuration (replacing Switch G and Switch H with layer-3 routers) compared to the original

configuration?

Part 1: Backbone Networks one network below, then answer the series of questions. Building 1 Building 2 COMPUTER Y COMPUTER Z SWITCHA LAN 1 LAN 3 HD LEGEND Gbps Ethernet Layer- 2 Switch 10 Gbps Ethernet Layer-2 Switch SWITCH B EE SWITCH E LAN 2 LAN 4 Computer w/ 1 Gbps Ethernet Network Adapter -Category 6 Ethernet Cable SWITCH G SWITCHHH SWITCHF