6.4-1 Network- and Link-layer addressing: an end-to-end-scenario (1a). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. Match the source/destination network- or link-layer address at the location (3) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 A (1) What is the source MAC address on the frame at point (3)? What is the source IP address of the datagram at point (3)? 68-01-BC-58-AF-24 128.119.50.107 [Choose ] D5-AO-EE-9A-73-D5 49-FA-BO-3C-E2-7C (2) 72-9E-4A-31-9C-42 What is the destination MAC address on the frame at point (3)? What is the destination IP address of the datagram at point (3)? The MAC address of the switch between host B and location (3). 128.119.240.116 128.119.240.15 CC-A 68-01-BC-58-AF-24 128. 128.119.50.60 128.119.50.107 [Choose] 49-FA-B0-3C-E2-7C 128.119.50.60 [Choose] [Choose ] [Choose] < 4C-90-AA-74-06-1F 128.119.240.52 <
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- 6.4-3 Network- and Link-layer addressing: an end-to-end-scenario (1c). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. Match the source/destination network- or link-layer address at the location (5)by choosing a value from the pulldown list. [Note: You can find more examples of problems similar to this here.]6.4-2 Network- and Link-layer addressing: an end-to-end-scenario (1b). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. Match the source/destination network- or link-layer address at the location (4) by choosing a value from the pulldown list. [Note: You can find more examples problems similar to this here.] 49-FA-BO-3C-E2-70 128.119.50.60 68-01-BC-58-AF-24 128.119.50.107 4C-9D-AA-74-D6-1F 128.119.240.52 77-34-F1-EF-14-72 128.119.97.18 (1) (2) (5) 72-9E-4A-31-9C-42 128.119.240.15 D5-A0-EE-9A-73-D5 128.119.240.116 CC-A5-81-OB-AE-33 128.119.97.194 What is the source MAC address on the frame at point (4)? 1.128.119.50.60 * What is the destination MAC address on the frame at point (4)? 2.72-9E-4A-31-9C-42 e What is the source IP address of the datagram at point (4)? 3. 128.119,50.107 - What is the destination IP address of the datagram at point (4)?…6.4-1 Network- and Link-layer addressing: an end-to-end-scenario (1a). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. Match the source/destination network- or link-layer address at the location (3) by choosing a value from the pulldown list. [Note: You can find more examples of problems similar to this here.] 49-FA-BO-3C-E2-70 128.119.50.60 68-01-Вс-58-AF-24 128.119,50.107 4C-9D-AA-74-D6-1F 128.119.240.52 (6) 77-34-F1-EF-14-72 128.119.97.18 D5-A0-EE-9A-73-D5 128.119.240.116 72-9E-4A-31-9C-42 128.119.240.15 СС-45-81-ов-АЕ-33 128.119,97.194 : What is the source MAC address on the frame at point (3)? 1.128.119.50.107 What is the destination MAC address on the frame at point (3)? 2. 128.119.240.116 What is the source IP address of the datagram at point (3)? What is the destination IP address of the datagram at point (3)? 3.49-FA-B0-3C-E2-7C…
- 6.4-7 Network- and Link-layer addressing: an end-to-end-scenario (2a). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node A to node C. Match the source/destination network- or link-layer address at the location (2) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 (1) What is the source MAC address on the frame at point (2)? What is the source IP address of the datagram at point (2)? 68-01-BC-58-AF-24 128.119.50.107 (2) What is the destination IP address of the datagram at point (2)? (3) CC-A5-81-0B-AE-33 128.119.97.194 49-FA-BO-3C-E2-7C 128.119.50.60 72-9E-4A-31-9C-42 128.119.240.15 [Choose ] [Choose ] 128.119.240.52 What is the destination MAC address on the 128.119.97.18 frame at point (2)? 4C-90-AA-74-D6-1F 128.119.240.52 (6) (5) C D5-A0-EE-9A-73-D5 128.119.240.116 4C-9D-AA-74-D6-1F 128.119.97.194 The MAC address of the switch…6.4-12 Network- and Link-layer addressing: an end-to-end-scenario (3c). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node C to node A (note: from right to left). Match the source/destination network- or link-layer address at the location (6) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 (6) 68-01-BC-58-AF-24 128.119.50.107 (5) What is the source IP address of the datagram at point (6)? What is the source MAC address on the frame at point (6)? CC-A5-81-OB-AE-33 128.119.97.194 What is the destination MAC address on the frame at point (6)? What is the destination IP address of the datagram at point (6)? (4) 49-FA-B0-3C-E2-7C 128.119.50.60 72-9E-4A-31-9C-42 128.119.240,15 (3) 128.119.97.194 128.119.97.18 128.119.240.52 [Choose ] [Choose ] 4C-9D-AA-74-D6-1F 4C-9D-AA-74-D6-1F 128.119.240.52 (1) (2) C D D5-A0-EE-9A-73-D5 128.119.240.116…6.4-11 Network- and Link-layer addressing: an end-to-end-scenario (3b). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node C to node A (note: from right to left). Match the source/destination network- or link-layer address at the location (3) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 (6) 68-01-BC-58-AF-24 128.119.50.107 (5) What is the source IP address of the datagram at point (3)? CC-A5 128.1 What is the source MAC address on the frame at point (3)? What is the destination MAC address on the frame at point (3)? What is the destination IP address of the datagram at point (3)? [Choose ] The MAC address of the switch immediately right of location (3). 128.119.97.194 128.119.240.15 72-9E-4A-31-9C-42 CC-A5-81-OB-AE-33 128.119.97.18 128.119.240.52 77-34-F1-EF-14-72 4C-9D-AA-74-D6-1F [Choose ] 49-FA-BO-3C-E2-7C 128.119.50.60…
- 6.4-10 Network- and Link-layer addressing: an end-to-end-scenario (3a). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node C to node A (note: from right to left). Match the source/destination network- or link-layer address at the location (1) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 A (6) 68-01-BC-58-AF-24 128.119.50.107 (5) What is the source IP address of the datagram at point (1)? CC-A5 128.1 What is the source MAC address on the frame at point (1)? What is the destination MAC address on the frame at point (1)? What is the destination IP address of the datagram at point (1)? [Choose ] The MAC address of the switch immediately left of location (1). 128.119.240.52 72-9E-4A-31-9C-42 CC-A5-81-0B-AE-33 128.119.97.194 128.119.240.15 128.119.97.18 4C-9D-AA-74-D6-1F 77-34-F1-EF-14-72 [Choose ] 49-FA-B0-3C-E2-7C 128.119.50.60…A frame containing http request is sent from Computer (A) [in whichever subnet it is now, make sure to show it in your figure], to the access point it is associated with. Draw the address fields (1, 2, and 3) of the frame travelling from Computer A to AP and the source and destination addresses of the frame travelling from AP to R1. The MAC addresses of AP1, AP2, and AP3 are M1, M2, and M3 respectively, and the Router R1’s MAC address connected to this Switch/AP is MRA. IP address values are already given, and the port addresses could also be used as given. The Router’s MAC address facing WAN side is MRW.Discuss the invocation semantics that can be achieved when the request-reply protocol is implemented over a TCP/IP connection, which guarantees that data is delivered in the order sent, without loss or duplication. {Note: Take into account all of the conditions causing a connection to be broken}
- Problem 3 Consider the problem of deciding whether to implement a virtual- circuit or a datagram network. Assume a network protocol that allows the system to operate as either a virtual circuit network or a datagram network. That is, its packet header format is specified such that it incorporates both a VCI (Virtual Circuit Identifier) and an arbitrary source/destination addresses. When operating as a virtual circuit, it requires a 4-byte header. When operating as a datagram network, it requires a 40-byte header. Assume that there are 4 hops from source to destination, and that a set up or tear down request packet is 80 bytes (including the header). The total message length is 4096 bytes, the data rate is 9600 bps on all links and the packet size is 256 bytes (including the header). i) If we operate in the datagram mode, how long does it take for the first packet to reach the destination? If we operate in virtual-circuit mode, how long does it take for the first packet to reach the…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…4. The original HTTP protocol used TCP/IP as the underlying protocol. For each page, graphic, or applet, a separate TCP connection was constructed, used, and terminated. This caused several problems: one referred to as the elephant and mice problem and two aspects of connection overhead. Describe both problems. Why were separate connections used? Would UDP rather than TCP be a good alternative? What solution would you propose to these problems to improve HTTP performance?