- Cỏc d鵜ch v映 ph違i 8瓜c l壱p v噂i cụng ngh羽"8逢嬰c dựng trong m衣ng. - T亥ng giao v壱n ph違i 8瓜c l壱p v噂i cụng ngh羽"8逢嬰c dựng trong m衣ng.
- Cỏc 8鵜a ch雨 m衣ng ph違i th嘘ng nh医t 8吋 t亥ng giao v壱n cú th吋 dựng c違 m衣ng LAN và WAN.
Cú 2 loＴi dおch vつ :
- D鵜ch v映 truy隠n tin cú liờn k院t (Connection ｏriennted Service) - D鵜ch v映 truy隠n tin khụng liờn k院t (Connectionless Service)
U詠 khỏc nhau gi英a hai d鵜ch v映
X医n 8隠 D鵜ch v映cú liờn k院t D鵜ch v映khụng liờn k院t
Kh荏i 8瓜ng kờnh C亥n thi院t Khụng
A鵜a ch雨"8ớch Ch雨 c亥n lỳc kh荏i 8瓜ng C亥n 荏 m丑i gúi tin Th逢t詠gúi tin A逢嬰c 8違m b違o Khụng 8違m b違o Ki吋m soỏt l厩i 荏t亥ng m衣ng 荏t亥ng giao v壱n
Ak隠u khi吋n thụng l逢嬰ng 荏 t亥ng m衣ng 荏 t亥ng giao v壱n Th違o thu壱n tham s嘘 Cú Khụng
Nh壱n d衣ng liờn k院t Cú Khụng
Cỏc hàm c挨 b違n c栄a d鵜ch v映 liờn k院t t亥ng m衣ng :
N-CONNECT. Request (callce, caller, acks wanted, exp wanted, qos, user data) N-CONNECT. Indication (callce, caller, acks wanted, exp wanted, qos, user data) N-CONNECT. Response (response acks wanted, exp wanted, qos, user data) N-CONNECT. Confirmation (response acks wanted, exp wanted, qos, user data) N-DISCONNNECT. Request (originator, reason, user data, responding address) N-DISCONNNECT. Indication (originator, reason, user data, responding address) N-DATA. Request (user data)
N-DATA. Indication (user data) N-DATA-ACKNOWLEDGED. Request () N-DATA-ACKNOWLEDGED. Indication () N-EXPEDITED-DATA. Request (user data) N-EXPEDITED-DATA. Indication (user data) N-RESET. Request (originator, reason)
0=Individual 0=Universal
1 bit 1 bit 22 bit 24 bit
N-RESET. Indication (originator, reason) N-RESET. Response()
N-RESET. Confim()
Cỏc hàm c挨 b違n c栄a d鵜ch v映 khụng liờn k院t t亥ng m衣ng
N-UNITDATA. Request (source address, destination address, qos, user_data) N-UNITDATA. Indication (source address, destination address, qos, user_data) N-FACILITY. Request (qos)
N-FACILITY. Indication (destination address, qos, reason) N-FACILITY. Indication (destination address, qos, reason)
Hàm N_FACILITY.request cho phộp NSD d鵜ch v映 m衣ng bi院t t益 l羽 ph亥n tr<m gúi tin 8ang 8逢嬰c giao v壱n.
Hàm N_REPORT.indication cho phộp t亥ng m衣ng thụng bỏo l衣i cho NSD d鵜ch x映 m衣ng.