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QUESTION:
a) Below is a capture of an Ethernet II frame which has an IPv4 packet and a segment. Provide the source MAC address in hexadecimal; the source IP address, the length, and the header checksum of the packet in decimal; the source port number in decimal and thus deduce the application layer protocol and whether this capture relates to a response or request message.
00 13 02 4a 88 97 00 15 56 3a 4c 79 08 00 45 0000 4c ae 91 40 00 3c 06 01 9b ca 7b 02 1a c0 a801 42 00 19 04 35 aa 36 09 bb e5 30 36 00 50 1840 b0 05 fa 00 00 32 35 30 20 6f 6b 3a 20 20 4d
b) A company occupies 3 floors of a building plus the basement. Each floor is occupied by one department and adds the office of one senior manager responsible for each department. About 30 PCs having internet access are expected on each floor. The basement accommodates various server machines. For security reasons the senior managers should be accessible from the other machines only via a firewall router. The company uses a private internal network: 192.168.1.0./24. The company has an ADSL connection to the Internet. As part of this arrangement the ISP issues the company with a single public Internet address: 202.123.21.144.
Show a full network diagram for the company and make sure you identify any network devices, transmission technology and media. You have to give the IP, subnet mask and gateway addresses for all devices and servers that you find pertinent to your design. You have to also devise a scheme to allow the single public IP address to be shared among the whole staff and give special server configurations to meet company's goals. Provide the network configuration for 1 staff PC and 1 senior manager PC from each department.
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