Communications protocols The messages the client sends to the server form a anguage The server has to be programmed to understand that anguage The messages the server sends to the client also form a language The client has to be programmed to understand that anguage When a client and server are communicating, they are in effect having a conversation using these two languages The two languages and the rules of the conversation, taken together, are called the protocol www.oseng.com O Lethbridge/Laganiere 2001 Chap 3: Basing Development on Reusable© Lethbridge/Laganière 2001 Chap. 3: Basing Development on Reusable Technology 20 Communications protocols • The messages the client sends to the server form a language. — The server has to be programmed to understand that language. • The messages the server sends to the client also form a language. — The client has to be programmed to understand that language. • When a client and server are communicating, they are in effect having a conversation using these two languages • The two languages and the rules of the conversation, taken together, are called the protocol