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.
''The Constitution does not explicitly mention any right of privacy. In a line of decisions, however, . . . the Court has recognized that a right of personal privacy, or a guarantee of certain areas or zones of privacy, does exist under the Constitution.