4.03-1. Network Address Translation (a). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A? [Note: You can find more examples of problems similar to this here.] S: D: B S: NAT translation table WAN side addr 138.76.29.7, 5051 138.76.29.7 The source IP address is: The destination IP address is: The source port number is: The destination port number is: LAN side addr 10.0.0.1, 2020 ****** 10.0.0.4 S D: 10.0.0.1 2020 S: 128.119.40.186 5051 D: 10.0.0.1 10.0.0.2 10.0.0.3

Exercise 5.2.6 Use your textbook and the Internet to determine the communication steps in an ARP Request and Response. What steps are involved and how is each message sent ( broadcast to all devices or unicast to a single device)? 1. Based on the interface and the forwarding IP address, ARP consults the appropriate ARP cache for an entry for the forwarding IP address. If an entry is found, ARP skips to step 6. 2. If the entry is not found, ARP builds an ARP Request frame containing the MAC address of the interface sending the ARP Request, the IP address of the interface sending the ARP Request, and the forwarding IP address. ARP then broadcasts the ARP Request using the appropriate interface. 3. All hosts receive the broadcasted frame and the ARP Request is processed. If the receiving host's IP address matches the requested IP address (the forwarding IP address), its ARP cache is updated with the address mapping of the sender of the ARP Request. If the receiving host's IP address does…

An IP address can be written as a 32-bit number. For a class B network, the two most significant bits are set to 10. The 16 most significant bits are used as a network ID, and the 16 least significant bits are used as a host ID. However, the host ID cannot be all O's or all 1's. How many hosts (i.e., host IDs) can there be on a class B network? Type your answer.

Consider the subnet address 210.84.40.0, divided into 3 subnets. If we want to maximize the number of hosts per subnet, what subnet mask should we use? What would the numbers of the first 2 and last 2 subnets be, along with their address range and their broadcast? Explain your answers.

2. The following illustration shows a transmission from Host A to Host B using Network Address Translation (NAT). Host A is located inside a Local Area Network (LAN) with an IP address of 192.168.1.2. The LAN is connected to the Wide Area Network (WAN), i.e. the Internet, through a router R1 that conducts NAT. R1 has two interfaces with an internal LAN IP address (192.168.1.1) and and external WAN IP address (127.45.10.35). Host B is located outside the LAN and is a well-known server, e.g., Google's server. Host B has an IP address of 130.160.23.45. Port numbers for the application components running at both hosts are provided in the figure. For a single message M1 being sent from Host A to Host B, please fill in the blanks in the illustration below with the source IP address and Port number at Host A and at the Router R1. Any information not provided may be assumed, however, please state your assumption clearly. Host A Local Area Network (LAN) IP: 192.168.1.2 Port: 5252 Source IP…

Please idk if i got this right

Consider the following virtual circuit network with three reserved virtual circuits: уC1: H1, А, С, Е, Н2 VC2: H3, A, F, D, H4 ус3: НЗ, А, F, D, E, H2 Host H4 Host H3 Нost H2 Host H1 Draw the routing table of router D and the routing table of router C. *you may design a table using the HTML editor or write the content of routing table record by record (record per line).

Consider the network address 199.200.30.0. We want at least two subnets and between 60 and 70 hosts per subnet. What subnet mask should we use? What would the numbers of the first 2 and last 2 subnets be, along with their address range and their broadcast? Explain your answer.

4.3-2a Network Address Translation (a). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A? S: D: B S: D NAT translation table WAN side addr 138.76.29.7, 5051 10.0.0.1, 2020 138.76.29.7 The source IP address is: The destination IP address is: The source port number is: LAN side addr The destination port number is: 10.0.0.4 S D: S: D: [Choose ] [Choose] 5051 80 128.119.40.186 2020 10.0.0.4 10.0.0.1 138.76.29.7 10.0.0.1 10.0.0.2 10.0.0.3