"OSI layer Seven Protocol"
Application Layer
An application that communicates with other computers, which is the communication service of the corresponding application. For example, a word processor without a communication function would not be able to execute the code of communication, and the programmer working on the word processing did not care about the 7th layer of the OSI. However, if you add an option to transfer files, the programmer of the
In the previous article, "Master Programmer's Training: TCP, message subcontracting and protocol design" discusses some of the topic of protocol design, here to add to the HTTP protocol and binary protocol comparison.The HTTP protocol is a text
Swift protocol and swift Protocol
The protocol in Swift is also called in object-c, but in other languages it may be called Interface (such as java) or pure virtual function. In fact, it all means.
The Protocol is mainly used to define uniform methods and attribute names, but does not implement any functions. Only the
Protocol and proxy, protocol proxy
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Protocols and Proxies
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[Agreement]
@ Protocol
[Role of the Protocol]: Specifies the interface method to be implemented. An agreement that must be followed by the entrusting party and the agent.
Delegate by (
Protocol (Protocol)Protocol is common in iOS, the protocol is a set of standards, similar to a list, it says that there are some things to be done, it depends on who signed the agreement, if who signed the agreement, then it will achieve (complete) the agreement required to complete the things.Create
Simple implementation of Mina custom protocol and mina custom protocol
Because the company needs to create an automatic weighing system for electronic scales and implement a custom protocol, Mina is used for simple implementation. Because it is relatively simple, code is directly used. Change to Netty if you have timeServer
Package net. heartma. server; import ja
One-phase commit protocol and two-phase commit protocol for transactions
Because transactions need to implement ACID, that is, atomicity, consistency, isolation, and durability, a certain mechanism is required to ensure that transactions are committed in stages.
XA: XA protocol, which specifies the Transaction Manager and resource manager interfaces and adopts th
Http protocol and http protocol details
HTTP is an object-oriented protocol at the application layer. It is applicable to distributed hypermedia information systems due to its simple and fast method. It proposed in 1990 that, after several years of use and development, it has been continuously improved and expanded. Currently, the sixth version of HTTP/1.0 is use
"Protocol" is an indispensable concept for understanding servers and networks."Agreement (Protocol)" has the meaning of "rules, provisions".In fact, the function of "protocol" is very wide, in the field of communication, "protocol" provides "in the communication, in what circumstances, in what order, what kind of way t
TelnetWhat is Telnet protocol?Telnet Server Software is our most commonly used Telnet Server software and is a typical client/server model service that uses the Telnet protocol to work. So, what is the Telnet protocol? What features does it have?Telnet is a protocol located at layer 7th of the OSI model---application l
I. Overview
A protocol is a delegate (delegate)/proxy, which is an object that provides an opportunity to respond to changes in another object or to affect the behavior of another object.
A protocol can only be used for one purpose, that is, to declare a heap of methods for an inherited class.
The base class adheres to the Protocol, and its deriv
Put the three Protocols together for learning because these three protocols are on the same layer. ARP is used to find the MAC address of the Ethernet NIC of the target host, and the IP address carries the message to be sent. The data link layer can get the data transmission information from ARP, and get the data information to be transmitted from the IP address.1. IP protocol
The IP protocol is the core of
[Swift] Day13: Protocol, swiftday13 ProtocolProtocol attribute Protocol
We can define attributes in the Protocol. The following code is incorrect, because the Protocol defines the read-only attribute, but tries to modify its value:
protocol FullyNamed { var fullName: Stri
What is the industrial Internet of things?In short, it is the specific application of the Internet of things in industrial control.What is SSL/TLS?SSL (secure Sockets layer Secure socket), and its successor Transport Layer Security (Transport layer Security,tls) is a security protocol that provides security and data integrity for network traffic. TLS encrypts the network connection with SSL at the transport layer. Most of the Internet login is the use
This time, we will mainly explain the issues related to the daytime protocol and time protocol. Let's take a look at the content of the daytime protocol and time protocol. In a LAN, many systems require that each computer maintain time consistency. The WIN2000 system provides the time synchronization function with the
8.1 Address Mapping
At the network level, hosts and routers are identified by their logical addresses (IP addresses). The logical address is unique globally.
At the physical level, hosts and routers are identified by local addresses. 8.1.1 Static Mappings
Map physical and logical addresses to a single table. Save to each machine, Cons: Need to update 8.1.2 dynamic Mappings periodically
Use protocols to find static addresses based on logical addresses. There are currently two types of protocols:
protocol [' pr?ut?k?l] (example:http://blog.sina.com.cn/s/blog_6aafe9c90100yozz.html )I. Descriptiontwo classes for communication, with the protocol is more convenient. 1. The protocol declares a method that can be implemented by any class2. The protocol is not a class, it defines an interface that other objects can
HTTP is a stateless protocol, with two consecutive requests for the same session that are not known to each other, and they are parsed by the newly instantiated environment, which does not save any information about the session, except that the application itself may already be stored in the global object. own understanding, in the ASP: every time the page submission server does not have any relationship, each time the information recorded on the pag
We have analyzed some protocols and the content of the protocol stack. I believe everyone understands the content of the H.323 protocol. Here we will explain the development of this protocol stack. Developing an H.323 protocol stack is an extremely arduous task in the communication design process. The difficulty lies i
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Can be used to declare a whole bunch of methods (cannot declare member variables)
As long as a class adheres to this protocol, it is equivalent to having all the method declarations in this agreement
As long as the parent class adheres to a protocol, the subclass also adheres
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