After Franklin Roosevelt died in office in April 1945, Eleanor was expected to retire to a quiet, private life. However, by the end of the year she was back in public. America's new president, Harry S. Truman (1884â1972), made her the American representative to the United Nations Commission on Human Rights.
The UDP protocol header consists of 8 bytes of Protocol Control Information (PCI) The UDP header consists of four fields each of 2 bytes in length: Source Port (UDP packets from a client use this as a service access point (SAP) to indicate the session on the local client that originated the packet.
Before we cover passive OS fingerprinting, let us look at the TCP and IP headers. Figure 1 shows an example of an IP header. The first field we want to look at is the Type of Service field (TOS). The TOS field conveys the operating system and tells if there are any special requirements for the data.