m R5 R3 R4 the step-by-step operation of Dijkstra\'s algorithm for R3. ( 16 pts)

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m R5 R3 R4 the step-by-step operation of Dijkstra's algorithm for R3. ( 16 pts) Show Name two problems that would arise ifall routing in the Internet was done usi b. State and Dijkstra's algorithm. Does Distance-Vector routing surer pla Does Distance-Vector routing suffer from these what are the differences between routing and forw arding? Briefly explai them. (6 pts) Q5: A Day of Life (8-4 pts-32pts) MAScrverSi, ro Consider the network scenario shown in the figure on next page. FTP server, SI , ro R1,R2, R3, R4 and R5 are all part of the same autonomous system ( ) with IP block 128.228.38.0/26. ASI ismulti-homed with two ISPs, ISPI and and ISP2 Router I the gateway router ofAS1 that is connected to the two ISPs. Router RT is NAT enal R1 is andis connected to the network through interface The FTP server er SI h S1 has a privat address 10.0.0.16. On the other side of the Internet, there is another autonomous system AS2 th a contains router R6 attached with a server S2 running both DHCP an d DNS. R6 also connects a wireless Access Point (AP) through Ethernet link. Client CI is a wireless mobile device that joins the network through the AP. Note that AS2 can be reached through both ISP1 and ISP2 as well. Answer the following questions:

Explanation / Answer

Question 5:

When a mobile device tries to connect to the network for the first time, the Dynamic Host Configuration Protocol (DHCP) is the first protocol that is being used to get the IP address and other network configurations.

To get the IP address, the DHCP of the client sends a DHCPDISCOVER message. DHCPDISCOVER is a broadcast message in the network layer that uses 255.255.255.255 as it's destination address and 0.0.0.0 as it's source address.

Now, as DHCPDISCOVER is a broadcast message and it needs to be send to all devices because the client don't have any knowledge about the network and it doesn't have any information about the DHCP server address. This is why, this message should be send to all devices and in order to do that, the data link layer destination address i.e., the destination MAC address must be the MAC Broadcast Address which is FF:FF:FF:FF:FF:FF so that every device in the subnet must receive the packet.

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