a. Further suppose that by accident, each ISP has configuredits AP to operate over channel 11. Will the 802.11 protocolcompletely break down in this situation? Discuss what happens whentwo stations, each associated with a different ISP. attempt totransmit at the same time. b. now suppose that one AP operates over channel 1 and theother over channel 11.
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- Let’s consider you have a Class C IP address 204.15.5.0/24. You have to determine whether it is possible to createfollowing network with the given IP address? If yes, what could be the possible ranges of IP addresses for thesubnetworks? Let’s consider the above network. If you are using VLSM /CIDR, determine what subnet mask numbers allow therequired number of hosts.Given a scenario where there are two ISPs each running its own Access Point, and each using its own block of IP addresses. a) Consider that each Access Point was configured to run over channel 1, by each of the ISPs. Would the 802.11 protocol completely break down in this scenario? Explain using the following: if there are two stations, each associated with a different ISP, describe what happens when they both attempt to transmit at the same time. b) Suppose instead that one Access Point was configured to run over channel 1 and the other over channel 11. How do your answers in part a change using this scenario? Consider now, that the two Access Points are within the same ISP, located in two neighboring buildings. The interconnection device between the two APs is a switch. A user may move from one AP to another when signal strength decreases as the user moves. The switch is supposed to know which AP the user is connected to. Switches are self-learning; however, they were not…Let’s consider you have a Class C IP address 204.15.5.0/24. You have to determine whether it is possible to createfollowing network with the given IP address? If yes, what could be the possible ranges of IP addresses for thesubnetworks?
- Also answer: 2. The ISP that owns all these networks is short on IP addresses, so they use a NAT router for R2. How many public IP addresses will C and D use together assuming they use as many private 10.X IP addresses as they can? How many total public IP addresses will be used by the entire network? Why doesn’t the ISP care about how many private IP addresses are used?Question 5. Write a note on the following a. Compare the header format of IPv4 and IPv6. How tunneling is used to transition fromIPv4 to IPv6?b. Use Dijkstra’s algorithm on the following network to find shortest paths. c. Data 01110001101010100 is received where receiver uses odd parity. Is the data corrupted.Justify your answerd. What are the three main classes of MAC protocols? Explain each a one or two linese. Give steps of ARP mapping from IP to MAC address.A) IPv6 is now being deployed globally. Including the Interframe Gap, calculate themaximum data utilisation of TCP/IPv6 packets over a 100 Mbps Ethernet network.b) SLTP is a new transport protocol that runs over UDP. Including the Interframe gap,calculate the maximum data utilisation of SLTP/UDP/IPv6 packets over a 100 MbpsEthernet network.c) In order to make the setup in part b) totally secure, it has been decided to have twoadditional IPv6 headers. The first header is an Encryption header to allow the packet tobe encrypted. The second header is an IPv6 tunnelling header allowing a VPN to be setup. Calculate by how much this new arrangement decreases the maximum utilisation andcomment on your results.
- Given a scenario where there are two ISPs each running its own Access Point, and each using its own block of IP addresses. Consider that each Access Point was configured to run over channel 1, by each of the ISPs. Would the 802.11 protocol completely break down in this scenario? Explain using the following: if there are two stations, each associated with a different ISP, describe what happens when they both attempt to transmit at the same time. Suppose instead that one Access Point was configured to run over channel 1 and the other over channel 11. How do your answers in part a change using this scenario? Please answer question 1 and 2.After establishing a connection with the local DNS server PC1 now knows the IP and MAC addresses of PC2. Suppose PC1 [IP Address: 192.168.2.1, MAC Address: 0010.1191.A946] is sending an ARP packet to PC2 [IP Address: 192.168.2.2, MAC Address: 0110.1290.AD23]. What will be written in the target MAC address before the packet reaches PC2 ?Supposed the scenario bellow, we have 3 networks to be submitted with the ip address 192.171.0.0/16. Network 1 has 150 host, network 2 has 100 and network 3 has 7 host. VLSM Decompose the given ip address to these networks using VLSM, and write the ip adress and the subnet mask for router 1, switch 0 , switch 2 , switch 3 , PC0 , PC1 , PC2
- Assuming standard 1500 byte Ethernet max payloads: how many IPv4 fragments will be needed to transfer 2000 bytes of user data with a single UDP send? And, how do the 2000 bytes get split over the frags?Suppose an IP datagram is fragmented into 10 fragments, each with an independent loss probabilityof 1%. What is the probability of receiving the datagram correctly at the destination if (a) thedatagram (each fragment) is transmitted once; (b) the datagram (each fragment) is transmittedtwice?In order to implement a DNS amplification attack, the attacker must trigger the creation of a sufficiently large volume of DNS response packets from the intermediary to exceed the capacity of the link to the target organization. Consider an attack where the DNS response packets are 500 bytes in size (ignoring framing overhead). a. How many of these packets per second must the attacker trigger to flood a target organization using a 30-Mbps link? A 100-Mbps link? Or a 1-Gbps link? b. If the DNS request packet to the intermediary is 60 bytes in size, how much bandwidth does the attacker consume to send the necessary rate of DNS request packets for each of these three cases?