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 (
SMTP is used to deliver e-mail messages on the Internet. Document RFC821 provides all the details of the agreement. But you just have to remember the following-the basic commands and methods of the agreement.
The principle of the protocol is simple. Nothing more than a client computer sending a command to the server, and then the server returns some information to the client computer. The commands sent by the guest room and the server response are s
Introduction
There are many types of caching: Server caching, Third-party caching, browser caching, proxy caching, gateway caching, database caching, and so on. The browser cache is the least expensive because the browser cache relies on the client and consumes almost no server-side resources. Today's summary is also associated with browser caching.
Browser caching must be very familiar, simply that the browser on the disk to the most recent user requested data storage, when we request this page
AJP13 is the directional package protocol. For performance reasons, the binary format is used to transmit readability text. The Web server is connected through a TCP connection and a servlet container. To reduce the cost of process generation sockets, the Web server and the servlet container try to maintain a persistent TCP connection and reuse a connection for multiple request/reply loops. Once a connection is assigned to a specific request, it is no
UDP belongs to the transport layer together with the TCP mentioned earlier.
UDP differs from TCP in that it is a non-connection-oriented protocol, that is, when both parties communicate with each other, they do not need to establish a connection beforehand. So the UDP header saves a lot of fields, and the UDP header is only 8 bytes. The UDP header consists of the following:
The UDP header contains only the source port and destination port, plus th
TCP vs. UDP differencesTCP---Transmission Control Protocol, providing a connection-oriented, reliable byte-stream service. Before the customer and the server Exchange data with each other, a TCP connection must be established between the two parties before the data can be transferred. TCP provides time-out re-send, discard duplicate data, test data, flow control and other functions to ensure that data can be transmitted from one end to the other.UDP--
Preface: Because OBJECT-C does not support multiple inheritance, it is often replaced with protocol (protocol). The Protocol (protocol) can only define a common set of interfaces, but cannot provide a specific implementation method. That is, it only tells you what to do, but specifically how to do it, it does not care.
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
Objective-c Protocol (Protocol), objectivecprotocol
The Protocol is a list of methods shared by multiple classes. methods listed in the Protocol are not implemented in this class, but are implemented by other classes. To comply with a protocol, a class must implement all met
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:
Mysql communication protocol and mysql communication protocol
1. Mysql connection method
To understand the communication protocol of Mysql, you must first know the connection method used to connect to the Mysql server. The main connection methods of Mysql include Unix socket, Memory sharing, and named pipe, TCP/IP socket.
1.1Unix socket
In Linux and Unix environm
The Session Description Protocol (SDP) provides multimedia session descriptions for session notifications, session invitations, and other forms of multimedia session initialization.
The session directory is used to assist with multimedia conference announcements and send relevant settings for session participants. SDP is used to transmit this information to the receiving end. SDP is completely a session description format-it is not a Transport
Android implements the snmp protocol (1) and android implements the snmp protocolEarly January 2015. I received a call from a Huawei instructor and asked me to help me develop an App they would use at the Beijing Exhibition, this App can display the running status of Huawei's network devices and set some simple parameters, including AP, LSW, AP and AR.The Huawei instructor told me that they managed the protocol
Protocol for Ios development: protocol for ios development
Protocol is a difficult and important point in ios development. To use it well or understand it well, it may take time to accumulate. Today, let's take a simple look at how to use protocol through an example.
The example we use today is to simulate computer ins
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