industrial network protocols

backbone network, people connected to it through the IPIP (IP Encapsulation IP) tunnel. The Unix program mrouted can understand the DVMRP and IGMP protocols, but the Internet Router cannot. Many customers who want to adopt Multicast technology are still asking their ISP why some protocols do not work. DVMRP refers to the distance vector multicast routing protoco

The difference between get and post requests. 1, when the browser fallback and refresh, get harmless, but post will resubmit the data 2, get can be bookmarked, and post can not 3, get can be cached by the browser, and post can not 4. The encoding type of the GET request is application/x-www-form-urlencoded The encoding type of the POST request can be application/x-www-form-urlencoded and multipart/form-data 5, get parameters for the existence of browsing history, and post does not 6, get the url

During the time when I started network debugging, I always wanted to figure out how LAN access to the Internet was. Now pay attention to your computer. After the boot, after dozens of seconds of waiting, the operating system interface on the screen will appear in front of us. Just click on the browser icon to access our favorite website. However, nothing appears on the webpage as you think. What's wrong? Don't worry. We will handle this problem as soo

Tcpdump is a basic tool for network protocol analysis. Tshark is the command line version of wireshark (formerly known as ethereal), a well-known open-source network protocol analysis tool. wireshark can decode and analyze thousands of network protocols. Wireshark and tcpdump both use the libpcap library (see the libpc

Why are we always talking about router protocols? For the construction of a network, the use of the router protocol is directly related to the various performance and indicators of the network. So this is very important. With the complexity of the network structure, the use of a single Router Protocol can no longer mee

Here we will introduce the IPv6 network protocol. This protocol is an upgraded version of IPv4. However, at present, the Internet is in an excessive phase of Two-Protocol handover, which leads to an important problem-security. In this unstable situation, security vulnerabilities may easily occur. How can we prevent them? First, let's take a look at some basic knowledge about IPv6 network

Switching Mode for resources, and the peer-to-peer bidirectional 64 kbit/s fixed bandwidth channel provided for both parties of the communication is not suitable for data services with large burst data volumes and large differences in upstream and downstream data traffic ｡ The wide area network (WAN) protocol can be divided into DDN, X.25, frame relay, and IP network, because the IP

infrastructure or central device. In this system, all nodes can be moved randomly, and can maintain contact with other nodes, that is, each mobile node acts as both a router and a terminal at the same time. When two user terminals cannot communicate directly, communication is usually achieved by means of the routing function of other nodes ｡ The routing protocol is the basis for communication between mobile nodes in the Ad-hoc network. It also direct

architecture 2. Switch application processing to Open Systems (Windows and Unix) 3. IP addresses are widely used as interconnection protocols None of these trends is surprising. Using the IP protocol, Intel-compatible open-system servers have dominated modern data centers. Given this dominant processing architecture, Ethernet Interconnection is a logical choice, and no other network

For various reasons, many networks adopt multi-route protocols. This phenomenon is usually caused by merger and acquisition activities, or temporary occurrence during the migration. Many vro hardware manufacturers may use a variety of proprietary protocols to connect with standard protocols. Some routers will run more than one protocol and inevitably receive the

For various reasons, many networks adopt multi-route protocols. This phenomenon is usually caused by merger and acquisition activities, or temporary occurrence during the migration. 　　 Many vro hardware manufacturers may use a variety of proprietary protocols to connect with standard protocols. Some routers will run more than one protocol and inevitably receive t

Network Layer 2 (IPv4 and IPv6 addresses and related protocols) IP (internet protocol) protocol is the core protocol of the TCP/IP protocol family and the network layer of the internet. The current version number is 4, also known as IPv4. The next generation IP protocol version number is 6, that is, IPv6. As described in the