apn protocol

The ARP Address Resolution protocol is a TCP/IP protocol that obtains physical addresses based on IP addresses. It works in the second layer of the OSI seven-layer model-the data link layer.Using the ARP Address Resolution protocol, the destination hardware address (MAC address) information can be resolved according to the IP address information in the IP packet

Registering an application to a URL protocol (http://msdn2.microsoft.com/en-us/library/aa767914.aspx) ArticleAbout asynchronous pluggable protocols describes how to develop and process a new protocol.Program(Processor handlers ). In some cases, we may describe how to call another application to process custom protocols ). Register an existing application as a URL protocol processor. Once the application i

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

Chapter 3 _ IP Internet Protocol IP header IP protocol is the most core protocol in the TCP/IP protocol family. All TCP, UDP, ICMP, and IGMP data are transmitted in IP datagram format. The IP address provides unreliable and connectionless services. Unreliable: IP datagram cannot be successfully delivered to the destina

What is the working principle of HTTP? How to optimize the HTTP protocol ?, Protocol Working Principle Optimization made by http1.0 Bandwidth: latency has been solved at this stage: 1. browser blocking: the browser can only connect to the same domain name with four connections at the same time. latency: 2. DNS query: The Browser needs to know the IP address of the target server to establish a connection del

Send the monkeys to the reinforcements.An RFC document on ICMP here!What the hell?In my opinion, the ICMP protocol is mainly to pass/query some basic information to each other, most of which is to pass some error message.For example, a sends the UDP message to B's 10000 port, but B's 10000 port does not open, it will return an ICMP packet to a, tell the A10000 port is not open.Basic query information, such as the most commonly used ping command, is to

OverviewBoth TCP and UDP use the same network-layer IP, but unlike UDP, TCP is a connection-oriented, reliable byte-stream protocol. Therefore, both parties must establish a TCP connection before transmitting the data. TCP realizes the transmission of reliability through the mechanism of verification, serial number, acknowledgment response, retransmission mechanism, Connection management and window control.TCP provides reliability in the following way

To put it simply, the svn + SSH (SVN over SSH) protocol works by establishing an SSH connection between the svn client and the server, and then pushing commands and transmitting data through the SSH connection, to achieve more secure SVN communication through SSH. Using SVN + SSH to access repository is the biggest difference from common HTTP or HTTPS methods, or the only difference is to log on to the remote host through SSH Security Authentication T

Msnp9 Protocol Analysis Report 1. Connection The MSN Messenger protocol is built on TCP/IP. In addition to direct "point-to-point" communication between file transmission and voice chat, all other scenarios are performed through the server. Logically, there are three types of servers with their respective roles: Dispatch server (DS)-the server on which the client first connects. Allocates appropriate notif

DHCP protocol Introduction DHCP, full name: Dynamic Host Configuration Protocol, Chinese name: Dynamic Host Configuration Protocol, its predecessor is BOOTP, it works at the OSI application layer, it is a proprietary protocol that helps computers obtain their configuration information from a specified DHCP server.DHCP

USB protocol analysis, usb protocol 1. Description structure of USB devices 1. Logical Organizational Structure The logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has one or more configurations. The configuration usually has one or more interfaces with zero or multiple endpoints. Each USB device can contain one or more configur

This paper will take SC water meter as an example to continue to explain the cj/t-188 Water Meter Protocol of the switching valve protocol analysis process, the following data without special description, all refer to hexadecimal. Open valve: Data transmission: FE fe fe fe-A0 17 01 55 50 16 The description is as follows: Fe fe FE: Protocol head (1-4 groups). 68:

RIP and IGRP are commonly used router configuration protocols. What problems should we pay attention to when configuring RIP and IGRP? What should we do? The following configuration steps provide detailed answers. RIP Protocol RIP (Routing information Protocol) is an Internal Gateway Protocol (IGP) that is widely used earlier and is suitable for small-sized sim

The TCP protocol is a unique identifier (IP address, protocol, port) that interacts with other processes using the network communication fee.TCP and UDP are the most different place, TCP provides a reliable data transmission service, TCP is connection-oriented, that is, the use of TCP communication between the two host first to go through a "call" process, wait until the end of the communication is ready to

Network programming, and obtain protocol data by protocol name-Linux general technology-Linux technology and application information. The following is a detailed description. # Include # Include Int main () { Struct protent * pro; Pro = getprotobyname ("tcp "); Printf ("protocol name: % s \ n", pro-> p_name ); Printf ("

SSCOP Service specific Connection oriented Protocol business-specific connection-oriented protocolThe function of SSCOP is to provide service to its upper SSCF module, to establish and release signaling connection for upper layer signaling user, and to provide a confirmed and non-verifiable message data transmission on the connection to reliably exchange signaling messages.It utilizes the non-reliable transmission process provided by the SAAL-CP layer