2.1.2 IPv4 header Checksum computation algorithm: The checksum is a 2-byte value. It is computed using the following algorithm. The sender of the IPv4 packet is required to compute the checksum value for the IP header fields and insert in the 'header checksum' field. The header checksum field is needed to ensure the integrity of the IP header.
![]() Determine Ip And Header Information For A Data Packet Verification From TheThe client retains 0.0.0.0 because the client hasn't received verification from the server that it's okay to start using the address offered. In the IP section of the capture below, the Source address of the client is still 0.0.0.0 and the Destination for the packet is still 255.255.255.255. In this case the server is sending the Subnet Mask, Default Gateway (Router), Lease Time, WINS server address (NetBIOS Name Service), and the NetBIOS Node Type.DHCP: Your IP Address (yiaddr) = 157.54.50.5DHCP: Renewal Time Value (T1) = 8 Days, 0:00:00DHCP: Rebinding Time Value (T2) = 14 Days, 0:00:00DHCP: IP Address Lease Time = 16 Days, 0:00:00DHCP: NetBIOS Name Service = 157.54.16.154The client responds to the DHCPOFFER by sending a DHCPREQUEST. Also, we see in the DHCP Option Field section the various options being sent by the server along with the IP address. Note the CHADDR field still contains the physical address of the requesting client. The YIADDR field is populated with the IP address the server is offering the client. Fight night round 3 psp cwcheatsThe YIADDR field contains the client's address, and the CHADDR and DHCP: Client Identifier fields are the physical address of the network card in the requesting client. The Source address is the DHCP server IP address, and the Destination address is still 255.255.255.255. The DHCP: Server Identifier field shows the IP address of the DHCP server offering the lease.The DHCP server responds to the DHCPREQUEST with a DHCPACK, thus completing the initialization cycle. The DHCP section identifies the packet as a Request and verifies the offered address using the DHCP: Requested Address field. This lets those other DHCP servers know they can release their offered addresses and return them to their available pools.
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