Computer network--Application layer

Architecture of network applications

1. Client/server (c/s) Web server Software Apach
2. Point-to-point structure (peer-to) segment-to-end height is extensible, but difficult to manage
3. The hybrid structure uses both advantages and avoids the disadvantages of both. napster file transfer with C/s service for file search

Use a large number of servers to achieve scalability, distributed, server farms.

Network Application Process Communication

How can I communicate between processes running on different hosts? Message exchange, also known as the communication between message exchange process using socket Send, receive message implementation

How is the process addressed?

Service Requirements for Web applications

1. Reliability
2. Bandwidth
3. Delay

Internet Transport Layer Service model

1. Tcp
2. Udp

Specific network applications and protocols

1. HTTP
2. SMTP POP IMAP
3. Dns
4. P2p

Socket programming

1. Tcp
2. Udp

Computer network--Application layer