Tầng Ứngdụng
MỤCTIÊU
¢Cungcấpcácdịchvụmạngchongườidùngcuối
¢Các ứngdụngmạngphổbiến:
E-mail
Web
Instant Message
Telnet, SSH
FTP, P2P file sharing
Networked Games
Video conference
2
Presentation
Session
Transpor t
Data link
Physical
Networ k
Application
03/2009 BM MMT&VT - KHOA CNTT - ĐH KHTN TP.HCM
NỘIDUNG
¢Cáckháiniệm
¢Lậptrình ứngdụng
¢Mộtsốdịchvụmạng
3
03/2009 BM MMT&VT - KHOA CNTT - ĐH KHTN TP.HCM
PROCESS -1
¢Process = tiếntrình
chươngtrìnhchạytrênmáy
Nhiềuluồngcôngviệc(thread –tiểutrình)
¢Liênlạcgiữacáctiếntrình:
Trêncùng1 máy:
¢hệđiềuhành
¢Chiasẻbộnhớ
¢Truyềnthông điệpgiữacáctiếntrình
4
User Pr ocess User Pr ocess
OS -Kernel
shared
resour ces
03/2009 BM MMT&VT - KHOA CNTT - ĐH KHTN TP.HCM
PROCESS -2
Trên2 máykhácnhau:
¢truyềndữliệuqua đườngmạng
¢VD: socket, name pipe, …
5
User Process
OS- Kernel
User Process
OS- Kernel
Net work
03/2009 BM MMT&VT - KHOA CNTT - ĐH KHTN TP.HCM
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