The First Division team restored parity through Steve Tosh and Jim Thomson but a Boyd header 18 minutes from time secured Rangers' victory.
Chris Pontius of United scored the fastest goal in team history, off a header 31 seconds into the match.
Moments before Portugal extended their advantage, Pereira denied Vahid Hashemian another chance to level with a header 10 yards from goal.
Martyn Waghorn equalised with a header 13 minutes after the break and a Marvin Sordell thunderbolt put England in front moments later.
Steve Cook's header 12 minutes from time secured a vital three points for the home team in their bid to avoid relegation.
But Roma were not to be denied and Seydou Keita's header 13 minutes from time gave them the all-important away goal.
The 14-bit header [1,0,1,1,1,0,1,0,1,0,0,0,0] is inserted between every 7000 data frames and then the bit stream with the header is sent to the digital-to-analog converter where bit-1 and bit-0 are represented as +/– voltages.
Design congestion Header (14 byte).
This also limits the bandwidth cost of IPv6 header [30].
To transmit this GSM codec packet using VOIP, a RTP header (12 bytes), a UDP header (8 bytes), and an IP header (20 bytes) must be added, thereby giving a total IP packet size of 73 bytes.
All packets include 192 bit PLCP preamble and header, 32 bit FCS, and variable MAC header sent at 1 Mbps.
