Wireshark Lab DHCP by Ruslan Glybin.avi
I think about what the purpose of DHCP is, and how TCP is different from UDP, you'll realize why TCP would not work for it. The timing the first four packets were 1.787607, 2.787056, 2.787441, 2.791475 in seconds the timing very close to each other. The source port 67 and destination port 68 were the same as in the assignment. The link layer of my host address was 00:11:f5:ae:e8:ed. Values in the DHCP discover message differentiate DHCP request is option. Transaction-ID of first DHCP messages is 0x496bafb5. Transaction-ID of second DHCP message is 0x496bafb5 the same for third and forth. Transaction-ID is a random number by client. its' objective used to give client and DHCP server can defined DHCP message sending and DHCP message receiving has relation together. For each of the four DHCP messages (Discover/Offer /Request/ACK DHCP), indicate the source and destination IP addresses that are carried in the encapsulating IP datagram.answer Source IP address : 0.0.0.0 is special address. Destination IP address : 255.255.255.255 is broadcast IP address. My server ip address of DHCP is 192.168.1.1. 192.168.1.103. In the example screenshot in this assignment, there is no relay agent between the host and the DHCP server. Relay agent has responsibility to control send DHCP message across different subnet network. this lap is not relay agent because IP address is 0.0.0.0. Router is used to get to know what IP address of router, that used by client on network. subnet mask is defined where is host on network or sub network. Host has request the offered IP address in the DHCP Request message. lease time is time to tell how long IP address can used. Lease time in experiment is 1 hour. DHCP release message is used to tell DHCP server,that client has already used IP address. DHCP release message is used to tell DHCP server,that client has already used IP address. If DHCP release message is lost then that IP address has used until expired time. ARP (Address Solution Protocal) is protocal that used to mapped between IP address (Internet Protocal Address) with MAC Address (Media Access Control).
I think about what the purpose of DHCP is, and how TCP is different from UDP, you'll realize why TCP would not work for it. The timing the first four packets were 1.787607, 2.787056, 2.787441, 2.791475 in seconds the timing very close to each other. The source port 67 and destination port 68 were the same as in the assignment. The link layer of my host address was 00:11:f5:ae:e8:ed. Values in the DHCP discover message differentiate DHCP request is option. Transaction-ID of first DHCP messages is 0x496bafb5. Transaction-ID of second DHCP message is 0x496bafb5 the same for third and forth. Transaction-ID is a random number by client. its' objective used to give client and DHCP server can defined DHCP message sending and DHCP message receiving has relation together. For each of the four DHCP messages (Discover/Offer /Request/ACK DHCP), indicate the source and destination IP addresses that are carried in the encapsulating IP datagram.answer Source IP address : 0.0.0.0 is special address. Destination IP address : 255.255.255.255 is broadcast IP address. My server ip address of DHCP is 192.168.1.1. 192.168.1.103. In the example screenshot in this assignment, there is no relay agent between the host and the DHCP server. Relay agent has responsibility to control send DHCP message across different subnet network. this lap is not relay agent because IP address is 0.0.0.0. Router is used to get to know what IP address of router, that used by client on network. subnet mask is defined where is host on network or sub network. Host has request the offered IP address in the DHCP Request message. lease time is time to tell how long IP address can used. Lease time in experiment is 1 hour. DHCP release message is used to tell DHCP server,that client has already used IP address. DHCP release message is used to tell DHCP server,that client has already used IP address. If DHCP release message is lost then that IP address has used until expired time. ARP (Address Solution Protocal) is protocal that used to mapped between IP address (Internet Protocal Address) with MAC Address (Media Access Control).