what is sip protocol

We all know that the mobile phone system now mainly iOS and Android. But there are still a lot of people who don't quite know what iOS is? Now let's talk about what iOS means.iOS is an operating system developed by Apple for the iphone. It is mainly used for iphone, IPod Tou

What technical basis is needed to develop webapp? Or have you developed a WebApp video tutorial or a data-seeking recommendation Reply content: What technical basis is needed to develop webapp? Or have you developed a WebApp video tutorial or a data-seeking recommendation Databases: such as MySQLSQL language: L

IOS pushIOS has a push service program at the system level that uses port 5223. The protocol using this port originated from Jabber's later development into XMPP and was used in IM software such as Gtalk.Therefore, iOS push is not strictly understood:The message sent by the Apple Server to an IM service program mounted on the background of the mobile phone.Then, the system identifies the specific Apps Based

Configure Server settings Server IP address1. Edit the network configuration file # Vi/etc/sysconfig/network-scripts/ifcfg-eth02. Modify the network Auto-start (Modify the contents of the file) Onboot=yesVI command, I edit, move cursor, modify No to Yes, press ESC, enter WQ, save and exit.3. Restart the network server # Service Network Restart4. View native IP address, currently DHCP get IP Ifconfig10.0.2.15 is the native IP addressThe network configu

What is a broadband router? Broadband router is a new network product in recent years, it comes into being with the popularization of broadband. Broadband routers in a compact box integrated router, firewall, bandwidth control and management functions, with fast forwarding capabilities, broadband routers flexible network management and rich network status and so

Scalability Architecture, KVM virtualization technology, elk, container technology Docke(This stage can be completed:)And after learning to attend our Red Hat certification program, Red Hat certification is launched by Red Hat Linux, including Red Hat Certified Technician (RHCSA), Red Hat Certified Engineer (RHCE), and Red Hat certified architect (RHCA). It is a test project based on practical operation ab

packet length, so the upper layer Protocol requires the LLC to indicate.In the Ethernet_II frame, change the length field of 802.3 to type. It is not necessary to implement the LLC Sublayer, which contains only a single Mac Sublayer, when the upper layer protocol is distinguished by the Type field.Only now the manufac

Although these content in Baidu search has a bunch, but a lot of actually is the surface description. I would like to know what some of the real developers understand. Of course these programming languages are always just tools. Reply content:PHP has the advantage of being cross-platform, easy to deploy, easy to maintain, web-based, open source community powerful, and document-rich. As for the 3 foot separa

simple terms, the hierarchy is different.Second, WebSocket is what kind of agreement, concrete have what meritFirst, WebSocket is a persistent protocol, relative to HTTP, a non-persistent protocol.Let's take a simple example and

protocol itself is only 1.0 and 1.1, and is not directly related to HTML itself.In layman's terms, you can transfer non-HTML data using the HTTP protocol . =In simple terms, the hierarchy is different.Second, WebSocket is

wan bandwidth limit.However, in the following cases, try not to use EJB:1. Relatively simple pure web application development, no need to use EJB.2. Applications that need to be used together with other service programs, but the network protocol defined by the call or return can be solvedYou do not need to use EJB.3. applications with a C/S structure that are frequently asked by others should not use EJB whenever possible. Summary: A. EJB implement

1. What is "service cluster "? What is "enterprise-level development "?Now that EJB is for "service cluster" and "enterprise-level development", we have to talk about what is the so-cal

interface is implemented in the system kernel, Windows does not become Windows without a graphical interface, but Linux is different, without a graphical interface Linux or Linux, many Linux Web servers do not install X servers at all. This is also one of the important differences between Windows and Linux. Two, X is