#FIG 3.2PortraitCenterMetricA4100.00Single-21200 26 90 90 6525 25656 585 1440 1035 25652 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5	 585 1710 1035 1710 1035 2565 585 2565 585 17102 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5	 900 1710 990 1710 990 1440 900 1440 900 17102 4 0 1 0 7 50 0 -1 0.000 0 0 7 0 0 5	 990 2070 990 1755 630 1755 630 2070 990 2070-66 5220 90 6525 25202 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5	 5220 540 5850 540 5850 2070 5220 2070 5220 5402 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5850 540 6525 902 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5220 540 5895 902 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5850 2056 6525 16062 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 3	 5895 90 6525 90 6525 16202 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5	 5310 1395 5760 1395 5760 1980 5310 1980 5310 13952 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5400 1395 5400 19802 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5490 1395 5490 19802 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5580 1395 5580 19802 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2	 5670 1395 5670 19802 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5	 5310 675 5760 675 5760 810 5310 810 5310 6754 0 0 50 0 0 12 0.0000 4 135 1125 5265 2520 Content server\001-66 2295 990 3735 24301 3 0 1 0 7 50 0 -1 0.000 1 0.0000 3015 1710 720 720 3015 1710 3015 24304 0 0 50 0 0 12 0.0000 4 180 1110 2505 1777 WAP gateway\001-66 1440 1215 1890 15754 0 0 50 0 0 12 0.0000 4 135 420 1440 1350 WAP\0014 0 0 50 0 0 12 0.0000 4 135 420 1440 1575 stack\001-63 2 0 1 0 7 50 0 -1 0.000 0 1 1 4	0 0 1.00 60.00 120.00	0 0 1.00 60.00 120.00	 1170 1845 1845 1755 1755 2430 2340 2160	 0.000 -1.000 -1.000 0.0003 2 0 1 0 7 50 0 -1 0.000 0 1 1 4	0 0 1.00 60.00 120.00	0 0 1.00 60.00 120.00	 3735 1395 4590 1170 4365 1890 5175 1530	 0.000 -1.000 -1.000 0.0004 0 0 50 0 0 12 0.0000 4 135 465 90 1080 Phone\0014 0 0 50 0 0 12 0.0000 4 135 450 4185 990 HTTP\001-6