Network layer s transport segment from sending to receiving host data link 今 on sending side network data link data link data link physica physical encapsulates segments sica into datagrams physical physical go on receiving side to network data link data link delivers segments sical data link transport layer transport network layer protocols data link physical data link data link n every host router data link physical ohysical physical router examines header fields in all ip datagrams passing through it Network Layer 4-4Network Layer 4-4 Network layer ❖ transport segment from sending to receiving host ❖ on sending side encapsulates segments into datagrams ❖ on receiving side, delivers segments to transport layer ❖ network layer protocols in every host, router ❖ router examines header fields in all IP datagrams passing through it application transport network data link physical application transport network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical