That value is the id of the next protocol header right after Ethernet. The Ip4 header has a reserved id value of 0x800 for it. So anyone reading that packet has to look into that type field in order to determine the next protocol. When he does, 0x800 in that field tells him the next header is Ip4.
1 The Constitution contains no reference to any right to privacy. 2  However, over more than 100 years, courts have found a fundamental (but somewhat vague) right to privacy implicit in the Constitution.
1 Supreme Court views abortion as a privacy right and a liberty claim. 2  Abortion is protected by the Fourteenth Amendment, informed by the First, Third, Fourth, Fifth, and Ninth Amendments. Supreme Court cases dating back to late nineteenth century have established an implied right to privacy in the Constitution. 2  In 1923 case Meyers v. Nebraska, Court ruled that privacy was a liberty claim protected by the Fourteenth Amendment.