wire protocol

stackoverflow Can someone explain what a wire-level protocol is?

I am not very clear about the idea of wire-level protocols. I heard BitTorrent uses it and read that a wirelevel protocol can be considered an opposite of API. I read RMI calls can be considered wirelevel protocols but am still a little confused. Can someone explain this in a better way?

A

I wouldn't say that something uses a wire-level protocol or doesn't - I'd talk about which wire-level protocol it uses.

NOTE: 需要知道使用的是哪个wire-level protocol

Basically, if something's communicating with a remote machine (even conceptually) then there's some data going across the network connection (the wire). The description of that data is the "wire-level protocol". Even within that, you would often stop short of describing individual network packets - so the wire protocol for a TCP-based protocol would usually be defined in terms of opening a connection, the data streams between the two computers, and probably details of when each side would be expected to close the connection.

wikipedia Wire protocol

In computer networking, a wire protocol refers to a way of getting data from point to point: A wire protocol is needed if more than one application has to interoperate. It generally refers to protocols higher than the physical layer.[1] In contrast to transport protocols at the transport level (like TCP or UDP), the term "wire protocol" is used to describe a common way to represent information at the application level. It refers only to a common application layer protocol and not to a common object semantic[clarification needed] of the applications. Such a representation at application level needs a common infoset (e.g. XML) and a data binding (using e.g. a common encoding scheme like XSD).

The wire protocol may be either text-based or a binary protocol. Although an important architectural decision, this is a separate matter from the distinction between wire protocols and programmatic APIs.

In electronics, a wire protocol is the mechanism used to transmit data from one point to another.[1]