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Question 3 (15 Marks) Choose any valid MAC and IP addresses of your choice for Hosts A and B and the default gateway. Draw an appropriate network diagram. (a) A switched LAN has the following network ID: 192.168.2.0. Host A which is connected to switch port gio/2 needs to send data to a different host, Host B, which is connected to switch port gi0/7 on the same switch. Host A has MAC address A1 and IP address A2 while Host B has MAC address B1 and IP address B2. (1) Beginning at layer 3 which has just received information from the upper layer - Layer 4. explain the significant steps in the process of Host A constructing the frame to be sent. Make clear the information passed between layers and the key contents of the packet and/or frame. [5 Marks] (6) Assume the switch had an empty MAC address table before the process in (a) above started. What would be the content of the MAC address table (1) just before the frame is sent from the source, Host A (11) just after the frame is forwarded through the switch to destination, Host B (iii) just before Host B sends a frame back to Host A and (iv) just after the frame is forwarded through the switch to Host A. Explain the reason behind the said the content of the mac table at each of the four stages. [5 Marks] (c) Host B wants to send a broadcast packet (Layer 3 broadcast) to all hosts on network 192.168.2.0. (1) Beginning at layer 3. explain the significant steps in the process of Host B constructing the packet and/or frame to be sent out. Make clear the information passed between layers and the key contents of the packet and frame. (11) The frame sent from B Page 3 of 5 Question 3 (15 Marks) Choose any valid MAC and IP addresses of your choice for Hosts A and B and the default gateway. Draw an appropriate network diagram. (a) A switched LAN has the following network ID: 192.168.2.0. Host A which is connected to switch port gio/2 needs to send data to a different host, Host B, which is connected to switch port gi0/7 on the same switch. Host A has MAC address A1 and IP address A2 while Host B has MAC address B1 and IP address B2. (1) Beginning at layer 3 which has just received information from the upper layer - Layer 4. explain the significant steps in the process of Host A constructing the frame to be sent. Make clear the information passed between layers and the key contents of the packet and/or frame. [5 Marks] (6) Assume the switch had an empty MAC address table before the process in (a) above started. What would be the content of the MAC address table (1) just before the frame is sent from the source, Host A (11) just after the frame is forwarded through the switch to destination, Host B (iii) just before Host B sends a frame back to Host A and (iv) just after the frame is forwarded through the switch to Host A. Explain the reason behind the said the content of the mac table at each of the four stages. [5 Marks] (c) Host B wants to send a broadcast packet (Layer 3 broadcast) to all hosts on network 192.168.2.0. (1) Beginning at layer 3. explain the significant steps in the process of Host B constructing the packet and/or frame to be sent out. Make clear the information passed between layers and the key contents of the packet and frame. (11) The frame sent from B Page 3 of 5