(i) Explain with reason whether 124.279.2.4 is a feasible IP address. (2 marks) (ii) Consider the...

   

Transcribed Image Text:

(i) Explain with reason whether 124.279.2.4 is a feasible IP address. (2 marks) (ii) Consider the non-subnetted network. For the IP address 193.245.2.1, how many bits are for network L.D., and how many bits are for host I.D.? (2 marks) (iii) Assume an odd parity bit is added to a sequence of binary data. The data sequence is 1100101. After the odd parity bit is added at the end of the data sequence, what is the transmit data? (1 mark) (b) Consider a computer network as shown in Figure Q2. Interface Interface 2 Client (in private network) Network 18.0.0.0 Interface 3 Router Interface 3 Interface 1 Router D Figure Q2 Web Server (in private network) Interface Interface 2 Router E Network 17.000 In Figure Q2, there are five routers, i.e., Router A, Router B, Router C, Router D, and Router E. One client in a private network is connected to Interface 2 of Router A, and a web server (Port Number is 80) in a private network is connected to Interface 2 of Router C. Network 18.0.0.0 is connected to Router B, and network 17.0.0.0 is connected to Router E. The IP addresses and MAC addresses of the interfaces belonging to Routers A-E, the client, and the web server are listed in Table Q2-1 to Table Q2-6, respectively. Interface IP Address 131.123.0.1 192.168.0.2 (private IP Address) 159.168.0.2 2 Table Q2-1: Router A 3 MAC Address EE-BB-CC-11-22-33 EE-BB-CC-44-55-66 EE-BB-CC-77-88-99 Interface 2 3 Table Q2-2: RouterB IP Address 152.100.1.2 131.123.1.5 MAC Address DD-AA-CC-11-22-33 DD-AA-CC-44-55-66 Interface 1 2 Interface 2 Table Q2-3: Router Ⓒ IP Address 152.100,0.1 172.16.1.4 (private P Address) MAC Address EE-AA-BB-11-22-33 EE-AA-BB-44-55-66 Table Q2-5: Router E IP Address 147.62.1.4 MAC Address EE-AA-CC-11-22-33 Interface 1 3 Network Destination 17.0.0.0 18.0.0.0 Device Client Table Q2-4: Router D IP Address 159.168.15 147/62.2.1 Web Server Table Q2-6: Client and Web Server IP Address MAC Address 192.168.0.5 AA-BB-CC-11-22-33 (private IP Address) 172.162.5 (private P Address) MAC Address Routing Table of Router A Gateway DD-AA-BB-11-22-33 DD-AA-BB-44-55-66 Consider the routing table of Router A and fill out the Gateway and Interface components when the destination networks are 17.0.0.0 and 18.0.0.0. (4 marks) AA-BB-CC-44-55-66 Interface Assume that the client with a private IP address (Table Q2-6) wants to visit the web server with a private IP address (Table Q2-6). The client first sends a message to the web server via Router A, Router B, and Router C. Then, the web server sends a reply to the client via Router C, Router B, and Router A. (ii.1) First, consider the message from the client to the web server. For the data frame from Interface 1 of Router A to Interface 3 of Router B, what are the source IP address, destination IP address, source MAC address, destination MAC address, and destination Port Number? (5 marks) (ii.2) Then, consider the reply from the web server to the client. For the data frame from the web server to Interface 2 of Router C, what are the source IP address, destination IP address, source MAC address, and destination MAC address? (4 marks) (iii) Calculate the maximum number of devices that can be accommodated in the network 17.0.0.0 (excluding the all-zero and all-one addresses). (2 marks) (i) Explain with reason whether 124.279.2.4 is a feasible IP address. (2 marks) (ii) Consider the non-subnetted network. For the IP address 193.245.2.1, how many bits are for network L.D., and how many bits are for host I.D.? (2 marks) (iii) Assume an odd parity bit is added to a sequence of binary data. The data sequence is 1100101. After the odd parity bit is added at the end of the data sequence, what is the transmit data? (1 mark) (b) Consider a computer network as shown in Figure Q2. Interface Interface 2 Client (in private network) Network 18.0.0.0 Interface 3 Router Interface 3 Interface 1 Router D Figure Q2 Web Server (in private network) Interface Interface 2 Router E Network 17.000 In Figure Q2, there are five routers, i.e., Router A, Router B, Router C, Router D, and Router E. One client in a private network is connected to Interface 2 of Router A, and a web server (Port Number is 80) in a private network is connected to Interface 2 of Router C. Network 18.0.0.0 is connected to Router B, and network 17.0.0.0 is connected to Router E. The IP addresses and MAC addresses of the interfaces belonging to Routers A-E, the client, and the web server are listed in Table Q2-1 to Table Q2-6, respectively. Interface IP Address 131.123.0.1 192.168.0.2 (private IP Address) 159.168.0.2 2 Table Q2-1: Router A 3 MAC Address EE-BB-CC-11-22-33 EE-BB-CC-44-55-66 EE-BB-CC-77-88-99 Interface 2 3 Table Q2-2: RouterB IP Address 152.100.1.2 131.123.1.5 MAC Address DD-AA-CC-11-22-33 DD-AA-CC-44-55-66 Interface 1 2 Interface 2 Table Q2-3: Router Ⓒ IP Address 152.100,0.1 172.16.1.4 (private P Address) MAC Address EE-AA-BB-11-22-33 EE-AA-BB-44-55-66 Table Q2-5: Router E IP Address 147.62.1.4 MAC Address EE-AA-CC-11-22-33 Interface 1 3 Network Destination 17.0.0.0 18.0.0.0 Device Client Table Q2-4: Router D IP Address 159.168.15 147/62.2.1 Web Server Table Q2-6: Client and Web Server IP Address MAC Address 192.168.0.5 AA-BB-CC-11-22-33 (private IP Address) 172.162.5 (private P Address) MAC Address Routing Table of Router A Gateway DD-AA-BB-11-22-33 DD-AA-BB-44-55-66 Consider the routing table of Router A and fill out the Gateway and Interface components when the destination networks are 17.0.0.0 and 18.0.0.0. (4 marks) AA-BB-CC-44-55-66 Interface Assume that the client with a private IP address (Table Q2-6) wants to visit the web server with a private IP address (Table Q2-6). The client first sends a message to the web server via Router A, Router B, and Router C. Then, the web server sends a reply to the client via Router C, Router B, and Router A. (ii.1) First, consider the message from the client to the web server. For the data frame from Interface 1 of Router A to Interface 3 of Router B, what are the source IP address, destination IP address, source MAC address, destination MAC address, and destination Port Number? (5 marks) (ii.2) Then, consider the reply from the web server to the client. For the data frame from the web server to Interface 2 of Router C, what are the source IP address, destination IP address, source MAC address, and destination MAC address? (4 marks) (iii) Calculate the maximum number of devices that can be accommodated in the network 17.0.0.0 (excluding the all-zero and all-one addresses). (2 marks)

Answer rating: 100% (QA)

i The IP address 12427924 is not a feasible IP address because the valid range for each octet in an ... View the full answer