1. ia Systems
520251: Multimed
Multimedia
Delivering
17 ¡กÑั¹นÂยÒาÂย¹น 2555

2. ´ดÔิ¨จÔิ·ท∙ÑัÅลÊสÒาÁมÒาÃร¶ถàเ¼ผÂยáแ¾พÃร‹‹äไ´ดŒŒËหÅลÒา¡กÇวÔิ¸ธÕี

3. offline

4. online

5. [ÍอÔิ¹นàเ·ท∙ÍอÃรàเ¹น็µต]
•TCP/IP
•Internet Service Provider (ISP)
•Dial-up
•ADSL
•3G

7. [ÍอÔิ¹นàเ·ท∙ÍอÃรàเ¹น็µต]
•TCP/IP
•Internet Service Provider (ISP)
•Dial-up
•ADSL
•3G

16. 16 NETWORKING FUNDAMENTALS
Connection Speed Text Graphics Multimedia
Type
20 kB 100 kB 2 MB
Dial-up (V.90) 56 kbps 2.9 s 14.6 s 5 min
ADSL basic 512 kbps 320 ms 1.6 s 32.8 s
typical 2 Mbps 82 ms 410 ms 8.4 s
premium 8 Mbps 20.5 ms 102 ms 2.1 s
Cable typical 512 kbps 320 ms 1.6 s 32.8 s
premium 2 Mbps 82 ms 410 ms 8.4 s
Satellite† 512 kbps 860 ms 2.1 s 33.3 s
Leased T1 1.5 Mbps 109 ms 546 ms 11.2 s
line
T3 44 Mbps 3.7 ms 19 ms 381 ms
G3 phone 2 Mbps 82 ms 410 ms 8.4 s
Abilene 100 Mbps 1.6 ms 8.2 ms 168 ms
† Includes latency.
Figure 16.1. Typical download times
Clients and Servers

17. Client-Server Model
•¡กÒาÃร¡กÃรÐะ¨จÒาÂย¢ขŒŒÍอÁมÙูÅล¢ขÍอ§งÃรÐะºบºบÁมÑัÅลµตÔิÁมÕีàเ´ดÕีÂย¨จÐะãใªชŒŒ¾พ×ื้¹น°ฐÒา¹น¢ขÍอ§ง
client-server model
•server ¤คÍอÂยÃรÑัºบ request áแÅลÐะµตÍอºบÊส¹นÍอ§งµต‹‹Íอ client
ÊสÓำËหÃรÑัºบ¢ขŒŒÍอÁมÙูÅลáแÅลÐะºบÃรÔิ¡กÒาÃรµต‹‹Òา§งæๆ

18. HTTP (HyperText Transfer Protocol)
•àเ»ปšš¹น protocol áแºบºบ§ง‹‹ÒาÂย·ท∙Õี่ÍอÍอ¡กáแºบºบàเ¾พ×ื่ÍอãใËหŒŒ´ดÓำàเ¹นÔิ¹น¡กÒาÃรÃรÑัºบ
Êส‹‹§งÍอÂย‹‹Òา§งÃรÇว´ดàเÃร็Çว¢ขÍอ§ง¢ขŒŒÍอÁมÙูÅลáแºบºบ hypermedia ÃรÐะËหÇว‹‹Òา§ง
Web Server (server) ¡กÑัºบ Web Browser (client)

19. Unicast - Multicast
Unicast Multicast
•àเ»ปšš¹นÅลÑั¡กÉษ³ณÐะ¢ขŒŒÍอÁมÙูÅลäไ»ปÂยÑั§ง •àเ»ปšš¹นÅลÑั¡กÉษ³ณÐะ¢ขŒŒÍอÁมÙูÅลäไ»ปÂยÑั§ง
¤คÍอÁม¾พÔิÇวàเµตÍอÃร»ปÅลÒาÂย·ท∙Òา§งµตÑัÇว ¡กÅลØุ‹‹Áม¢ขÍอ§ง¤คÍอÁม¾พÔิÇวàเµตÍอÃร
ãใ´ดµตÑัÇวËห¹นÖึ่§ง´ดŒŒÇวÂย¡กÒาÃรÃรÐะºบØุ »ปÅลÒาÂย·ท∙Òา§งäไ´ดŒŒËหÅลÒาÂยµตÑัÇว
µตÓำáแËห¹น‹‹§ง¨จÓำàเ¾พÒาÐะ ¾พÃรŒŒÍอÁม¡กÑั¹นãใ¹น¡กÒาÃรÊส‹‹§งáแµต‹‹ÅลÐะ
¤คÃรÑั้§ง

20. àเËหÁมÒาÐะ¡กÑัºบ¡กÒาÃร·ท∙Óำ
streaming áแÅลÐะ internet
television
Multicast
•àเ»ปšš¹นÅลÑั¡กÉษ³ณÐะ¢ขŒŒÍอÁมÙูÅลäไ»ปÂยÑั§ง
¡กÅลØุ‹‹Áม¢ขÍอ§ง¤คÍอÁม¾พÔิÇวàเµตÍอÃร
»ปÅลÒาÂย·ท∙Òา§งäไ´ดŒŒËหÅลÒาÂยµตÑัÇว
¾พÃรŒŒÍอÁม¡กÑั¹นãใ¹น¡กÒาÃรÊส‹‹§งáแµต‹‹ÅลÐะ
¤คÃรÑั้§ง

21. [¡กÒาÃร¡กÃรÐะ¨จÒาÂยäไ¿ฟÅล MULTIMEDIA]
•FTP (File Transfer Protocol)
•RSS
•Podcasts
•Bit-Torrent (P2P)