Network Client-Server

Presentasi berjudul: "Network Client-Server"— Transcript presentasi:

1 Network Client-Server
Terminology A client initiates communication A server waits for incoming requests Integrated model (e.g. server as client) Does TCP/IP care? Client-Server Paradigms Message passing (Synch and Asynch) Remote Procedure Call (Syncg and Asynch) 4 /

2 Protocol Client Server
4 /

3 Client-Server Communication Models
Point-to-point Vs. Multi-point/Group – A client to multiple servers – A server to multiple clients Broadcast Vs. Multicast Connection-oriented Vs. Connectionless 4 /

4 Servers Design Issues System Ports Vs. User Ports
Statefull Vs. Stateless Servers Privileges and Complexity: authentication, authorization, data sharing, privacy, protection Robustness and Reliability Client or Message Independent Client or Message Independent (dispatching) Concurrency - Multi-processes - Multi-threaded - I/O Multiplexing - Asynchronous I/O 4 /

5 Client Design Issues Server Independent (dispatching)
Stateless Protocol/Messages (e.g. slide tool) Rich and Flexible Parameters (e.g. telnet ) 4 /

6 Praktek Membuat komunikasi Client server
Agar terbentuk menjadi jaringan komunikasi client server kita haruslah membuat 2 buah form yaitu: 1. Form Server sebagai sentral koneksi 2. Form Client sebagai user yang melakukan koneksi Pada jaringan Client –Server antara client dengan server haruslah menggunakan port yang sama, agar terjadi komunikasi 4 /

7 Buat Form Server seperti GUI (Graphical User Interface) di bawah ini
Namakan winsock1 dengan Wserver 4 /

8 4 / 8 - 10 Lalu tuliskan code dibawah ini pada text form tersebut
Private IP As String Private Sub Command1_Click() End End Sub Private Sub Form_Load() Text1.Text = Wserver.LocalIP Wserver.LocalPort = 5050 Wserver.Listen Private Sub Form_Unload(Cancel As Integer) Wserver.Close Private Sub Wserver_ConnectionRequest(ByVal requestID As Long) If Wserver.State <> sckClosed Then Wserver.Close Wserver.Accept requestID List1.AddItem "Client terkoneksi" 4 /

9 Buat Form Client Seperti GUI (Graphical User Interface) di bawah ini
Namakan winsock1 dengan wclient 4 /

10 4 / 10 - 10 Lalu tuliskan codeng dibawah ini pada text form tersebut
Private IP As String Private Sub Command2_Click() Unload Me End Sub Private Sub Form_Load() Text2.Text = Wclient.LocalIP IP = InputBox("Masukan IP Server: (contoh : )") Wclient.Connect IP, 5050 4 /