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.
Do you lose the right to privacy when you die? The Federal Privacy Act and the Health Insurance Portability and Accountability Act (HIPAA) do a fair job of protecting people's privacy, but there's one law that comes into direct conflict with them: the Freedom of Information Act (FOIA).