A host has been assigned the following IP address and mask: 192.169.45.161/20. Find the network address...
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A host has been assigned the following IP address and mask: 192.169.45.161/20. Find the network address (Fill in the blanks in the table: 30 points). IP Address in Binary Mask in Binary Network address in Binary Network address in Decimal 11000000 192. b. How many usable hosts can you get from this IP address and mask: 192.169.45.161/20 (5 points) c. A new shopping mall has obtained an IPv4 network address, 205.72.16.0/24. Management of the shopping mall would like to create 6 subnets, with each subnet serving 32 hosts. Could it be done? Demonstrate the reason with numbers (5 pionts). 2. The following packets Arriving Packet 1: Arriving Packet 2: Arriving Packet 3: This routing table shows this router's current routing table content. Find the next-hop router for each arriving packet using the 3-step routing decision rules. Explain your reasoning (30 points). Row 1 2 3 4 5 6 7 8 9 10 11 12 have arrived at a router: Destination IP Address 174.16.9.35 Destination IP Address 104.156.5.44 Destination IP Address 72.116.19.212 Note: 1. 2. 104.156.5.44 120.15.179.0 140.186.35.0 104.156.5.0 13 194.59.0.0 14 174.16.0.0 15 194.59.72.0 16 17 197.14.0.0 72.116.18.0 18 116.72.59.0 19 72.116.20.0 20 104.156.5.0 21 0.0.0.0 Destination IP of Arriving Packet 174.16.9.35 72.116.19.212 Destination Network 174.16.9.0 68.5.44.0 64.16.0.0 197.14.0.0 167.94.35.0 194.0.0.0 104.156.0.0 196.5.0.0 64.16.0.0 Routing Table Mask All Rows that Match 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.0.0.0 (/8) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.255.0.0 (16) 255.255.0.0 (/16) 255.255.255.0 (24) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 0.0.0.0 (10) Metric (Hop Next-Hop Count) Router Row Next Hop Selected Router -- 6 8 5 3 2 4 4 3 6 4 5 8 7 8 4 10 5 7 4 -- Local C A C A C D B E A C B A C A A E The outgoing router interface column is omitted from the table. Row 21 shows the default route. D C B Reason 3. Determine IP and frame header information for a data packet. F1 Client X Client X RA Interface FO RA Interface F1 RB Interface FO RB Interface F1 Server Y Source address FO RA Source address Source address FO IP Address 130.158.104.6 130.158.104.27 192.32.191.11 192.32.191.12 10.5.8.11 10.5.8.167 RB The configuration in the figure above shows three networks interconnected through two routers. Client X is sending a packet to Server Y. At the data link layer, the packet is encapsulated in a frame on each of the three networks (30 points). Destination address a. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from Client X to interface FO of RA Frame Header F1 Destination address MAC Address 88:77:66:55:44:33 F6:E5:D4:C3:B2:A1 A1:B2:C3:D4:E5:F6 33:44:55:66:77:88 12:34:56:65:43:21 AB:CD:EF:99:88:77 Frame/Packet from Client X to interface FO of RA b. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from interface F1 of RA to interface FO of RB. Frame Header IP Packet Header Server Y IP Packet Header Source address Destination address Source address Destination address IP Packet Header Source address Frame/Packet from interface F1 of RA to Interface FO of RB c. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from interface F1 of RB to Server Y. Frame Header Destination address Data Destination address Frame/Packet from interface F1 of RB to Server Y Hi Data Hi Data Hi A host has been assigned the following IP address and mask: 192.169.45.161/20. Find the network address (Fill in the blanks in the table: 30 points). IP Address in Binary Mask in Binary Network address in Binary Network address in Decimal 11000000 192. b. How many usable hosts can you get from this IP address and mask: 192.169.45.161/20 (5 points) c. A new shopping mall has obtained an IPv4 network address, 205.72.16.0/24. Management of the shopping mall would like to create 6 subnets, with each subnet serving 32 hosts. Could it be done? Demonstrate the reason with numbers (5 pionts). 2. The following packets Arriving Packet 1: Arriving Packet 2: Arriving Packet 3: This routing table shows this router's current routing table content. Find the next-hop router for each arriving packet using the 3-step routing decision rules. Explain your reasoning (30 points). Row 1 2 3 4 5 6 7 8 9 10 11 12 have arrived at a router: Destination IP Address 174.16.9.35 Destination IP Address 104.156.5.44 Destination IP Address 72.116.19.212 Note: 1. 2. 104.156.5.44 120.15.179.0 140.186.35.0 104.156.5.0 13 194.59.0.0 14 174.16.0.0 15 194.59.72.0 16 17 197.14.0.0 72.116.18.0 18 116.72.59.0 19 72.116.20.0 20 104.156.5.0 21 0.0.0.0 Destination IP of Arriving Packet 174.16.9.35 72.116.19.212 Destination Network 174.16.9.0 68.5.44.0 64.16.0.0 197.14.0.0 167.94.35.0 194.0.0.0 104.156.0.0 196.5.0.0 64.16.0.0 Routing Table Mask All Rows that Match 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.0.0.0 (/8) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.255.0.0 (16) 255.255.0.0 (/16) 255.255.255.0 (24) 255.255.0.0 (/16) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 255.255.255.0 (/24) 0.0.0.0 (10) Metric (Hop Next-Hop Count) Router Row Next Hop Selected Router -- 6 8 5 3 2 4 4 3 6 4 5 8 7 8 4 10 5 7 4 -- Local C A C A C D B E A C B A C A A E The outgoing router interface column is omitted from the table. Row 21 shows the default route. D C B Reason 3. Determine IP and frame header information for a data packet. F1 Client X Client X RA Interface FO RA Interface F1 RB Interface FO RB Interface F1 Server Y Source address FO RA Source address Source address FO IP Address 130.158.104.6 130.158.104.27 192.32.191.11 192.32.191.12 10.5.8.11 10.5.8.167 RB The configuration in the figure above shows three networks interconnected through two routers. Client X is sending a packet to Server Y. At the data link layer, the packet is encapsulated in a frame on each of the three networks (30 points). Destination address a. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from Client X to interface FO of RA Frame Header F1 Destination address MAC Address 88:77:66:55:44:33 F6:E5:D4:C3:B2:A1 A1:B2:C3:D4:E5:F6 33:44:55:66:77:88 12:34:56:65:43:21 AB:CD:EF:99:88:77 Frame/Packet from Client X to interface FO of RA b. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from interface F1 of RA to interface FO of RB. Frame Header IP Packet Header Server Y IP Packet Header Source address Destination address Source address Destination address IP Packet Header Source address Frame/Packet from interface F1 of RA to Interface FO of RB c. Record the destination/source MAC addresses and IP addresses for the frame/packet transmitted from interface F1 of RB to Server Y. Frame Header Destination address Data Destination address Frame/Packet from interface F1 of RB to Server Y Hi Data Hi Data Hi
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Auditing and Assurance services an integrated approach
ISBN: 978-0132575959
14th Edition
Authors: Alvin a. arens, Randal j. elder, Mark s. Beasley
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