Potocal
N. Agreement; protocol; etiquette; Diplomatic etiquette
In the field of computer network, the word potocal is usually translated as "protocol": IP Protocol, TCP Protocol, HTTP protocol (too many omit 1000 words) ~
It refers to the agreement between the two parties on how to exchange information
Personally, if you use the meaning of "etiquette" to understand potocal, sometimes it will be more convenient.
Because examples of life can be handy, analogy, to help vivid image of understanding and memory.
That, "Computer network: Top Down Method" The first chapter also gave the teacher lectures, students asked examples of the analogy
But the individual felt no vivid sunglass (▔,▔) deny
The vivid examples we have seen abound, such as a potocal:
A: [Look ~]
B: What do you look at?
A: What's your place?
———— three handshake, enter the fist time ————
This is a typical potocal that conforms to all the characteristics of potocal.
For example, potocal defines the format of the message exchange, and B needs to say exactly, "What are you talking about?" ”
Suppose B did not follow this format and said, "Emma, what are you going to look at?" The potocal.
Potocal also defines the order in which the message is exchanged, and B must be after a has seen him before he can say "what are you looking at?" ”
A must also be after B said "What do you look" before you can say "look at you?" ”
Imagine if a first said "Look at you?" "B," What are you talking about? "Isn't that a mess?
The third element of potocal is semantics, that is, what action you want to take.
For example, after the other person makes [see] action, you have to take the action is "ask"
And "What are you talking about?" "This is the" question "format.
Let me give you an example.
A few days ago saw a joke about Sichuan dialect, slightly modified as follows:
The teacher let Xiao Ming use "pleading" and "request" these two words to make a sentence, the emphasis must distinguish these two words difference.
Xiao Ming made the sentence: Mother supper made a pig's foot, dad ate a while to say "beg not to move", mother said "ask you to chew", Dad fell bowl away.
So the potocal is actually like this:
Dad: Beg not to move
Mom: ask you to chew
Dad: [Drop the bowl and go]
———— Three handshake completed, enter the couple Cold War time ————
The Northeast dialect protocol and the Sichuan dialect protocol, taking three handshake as an example