Only solve part d and e Q #1 Consider three LANs interconnected by two routers,
ID: 3599970 • Letter: O
Question
Only solve part d and e
Q #1 Consider three LANs interconnected by two routers, as shown below. A Subnet 1 D Subnet 3 Subnet 2 Figure 5.38 - Three subnets, interconnected by routers a Redraw the diagram to include adapters. b. Assign IP addresses to all of the interfaces. For subnet use addresses of the form 11.11.111.xxx; for subnet 2 uses addresses of the form 122.222.222.xxx; and for subnet 3 uses addresses of the form 133.133.133.xxx. They C. Assign MAC addresses to all of the adapters. d. Consider sending an IP datagram from Host A to Host F. Suppose all of the ARP tables are up to date. Enumerate all the steps, as done for the single-router example in section 5.4.2 (in the book). e. Repeat (d), now assuming that the ARP table in the sending host is empty (and the other tables are up to date ).Explanation / Answer
D) a) Forwarding table in A will determine that data will be sent or routed to interface 111.111.111.002.
b) The adapter in A craetes a ethernet packet with ethernet destination address 22-22-22-22-22-22.
c) first router on the A side will recieves the packet and extracts the datagram and forwading table in the router will indicate the datagram which is to be routed to 122.222.222.002
d) Then this router will send the ethernet packets with the destiation address as 55-55-55-55-55-55 and source adderess as 33-33-33-33-33-33 with ip address of 122.222.222.002
e)Until the packet is reached at the Host F , This process will continue
E ) Here ARP in Host A should determine the MAC address of 111.111.111.002. Then Host A sends an ARP Query packet within the broadcast Ethernet Frame. The router on sending side will recieve the query packet and then it sends it to the Host A as an ARP response packet. This ARP response packet is carried by the ethernet frame with destination address as 00-00-00-00-00-00.
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