1st Assignment XXXXXXXXXXpoints) A company has been assigned a class B address. A subnet of this company has network address XXXXXXXXXXand direct broadcast address XXXXXXXXXXa) Based on the previous...

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1st Assignment 1. (3.2 points) A company has been assigned a class B address. A subnet of this company has network address 177.82.162.32 and direct broadcast address 177.82.190.63. a) Based on the previous information, provide the two smallest network addresses that can be assigned to a subnet of this company. b) Provide the smallest and largest IP address that can be assigned to a host of each subnets of question “a)”. c) Provide the two largest network address that can be assigned to a subnet of this company. d) Provide the smallest and largest IP address that can be assigned to a host of each subnet of previous question “c)”. You must provide the values of all derived network addresses and IP addresses in Dotted Decimal Notation. You must show your derivations. 2. (3.8 points) Start your Bt5, Kali (or other Linux virtual machine) that has hping3 tool installed. In the Wireshark of Bt5 apply a packet capture filter that will capture only TCP packets that have ALL of the following properties: a) source port 55, b) destination port 82, 84 or 86 or 88, c) TCP ECN, URG, ACK, PSH, SYN bits set to 1, d) 1440 TCP data bytes e) IP Identification field 6988, f) a TCP window size of 39400, g) no IP and TCP header options. Type this capture filter. Also capture a screenshot of this applied filter in the Wireshark filter box of the Bt5. Now start the packet capturing process in both host OS and Bt5 Wiresharks. Next, use (in Bt5) one hping3 command that will transmit 11 TCP packets to the Host OS with source port 55 and destination ports 82,83,84,85,86,87,88,89,90,91 and 92. Moreover, each one of these packets must have the ECN, URG, ACK, PSH and SYN bits set to 1, its IP Identification field equal to 6988, 1420 TCP data bytes and a TCP window of 39400. Type the hping3 command you have used. 3. (2 points) Start your Bt5 (or Kali) and host OS system and use ifconfig or ipconfig to find their IP addresses. Capture screenshots of your ifconfig (or ipconfig) commands and corresponding outputs; showing the IP addresses of Bt5 and host OS. In your Bt5, type the hping3 command that will transmit to the host OS one TCP packet that has only its CWR, ECN, PSH and SYN bits set to 1 (and all other TCP flags set to 0), 52200 TCP data bytes and a destination port number 8740. Type the hping3 command you must use. In your Bt5, also apply a capture filter that will only capture the 9th, 25th and 34th fragments of the transmitted packet. Type the capture filter that you must use. Also capture a screenshot of this filter in the Wireshark filter box of Bt5. In the host OS start Wireshark and apply a capture filter that will only capture TCP packets with source IP address, the IP address of Bt5. Capture a screenshot of this filter. Now start both Wiresharks in Bt5 and host OS and, then, run the above hping3 command. Capture a screenshot of the hping3 command and its output. Capture a screenshot of the packet list pane of the host OS Wireshark showing in the packet list pane all fragments. Finally, capture a screenshot of the Bt5 Wireshark showing in the packet list pane the captured fragments, and in the packet detailed pane the fragmentation offset of the 25th fragment.
Mar 07, 2021
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