ethernet expander

Yan Hua technology recently launched the latest Ethernet Media switch product ADAM-6521S. A ADAM-6521S with a Single-Mode Optical Fiber port can be used as an industrial converter with a maximum transmission distance of 15 km. You can also use four industrial 10/100 Mbps Ethernet ports as a switch.Like other modules in the ADAM series, ADAM-6521S can be installed in three ways: DIN rail installation, wall m

The hardware components of the Ethernet Card are MAC/PHY/transformer/EEPROM. On our platform, Mac is generally integrated into the master. The PHY and the transformer are separated. (Because PHY simulates differential signals externally and integrates a large number of analog hardware, Mac is a typical full digital device. Chip area and analog/digital hybrid architecture are the reasons why Mac is first integrated into the microcontroller and PHY is l

I. Token Bus ARCNET is a local area network developed by datapoint in 1977. It is still widely used,And uses RG-62 coaxial cable as the NetWare LAN cabling system. ARCNET, which is exactly the same as ibm3270The cables connecting the terminal and the IBM host are the same, so this network is widely used in the Use base of a large number of IBM hosts.ARCNET can now use twisted pair wires and optical fiber cables. The new arcnet plus Speed has increased from 2.5 MB/STo 100 Mb/s (when using optical

Today, we introduce some common basic operations of Cisco devices, such as creating VLANs, binding network cables, doing trunks, using three-layer switching, and so on.This is today's topology diagram: Two three-layer switching, two PCs, respectively, add vlan10 and 20, two three layers to do network redundancy, and finally achieve two PC communication, very simple, but the use of an experiment:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/74/4E/wKiom1YYvWzg69qyAACaxI7J60E493.jpg "s

In the use of computers, often due to network configuration errors caused by the inability to surf the internet, affecting work, learning and entertainment, this situation in fact, as long as the Ethernet can be re-enabled. For the Novice computer, it is necessary to master the skills of network configuration. Here is a brief introduction of how to deal with this problem quickly under the WINDOWS8 system. Processing method: 1, right click on the des

Web3 Javascriptðappapi In order for your application to work on the etheric square, you can use the objects provided by the Web3.js library WEB3. At the bottom, it communicates with the local node through RPC calls. The web3.js works with any of the etheric square nodes that expose RPC layers. WEB3 contains ETH objects-Web3.eth (dedicated to the Ethernet block chain interaction) and Shh objects-web3.shh (for whisper interaction). Over time, we'll int

What are the advantages of a small pluggable (SFP) port for a Gigabit Ethernet switch? How do I connect the four SFP ports of a d-link DGS 1248 t smart switch? I think the main advantage of the SFP port is the flexibility to connect to the network. The SFP port is a hot-swappable input/output device that can be plugged into a Gigabit Ethernet port or slot to connect the port to the network. SFP ports can

TCL Network Equipment Co., Ltd. TCLS4109SFB, is a simple network management switch, is a team-level network equipment, on the basis of the mature chip scheme, specifically for the community users of broadband access to sudden high traffic, diversified natural environment conditions and other characteristics of the optimization design, so as to obtain small volume, Good sealing and wide operating temperature and humidity range provides simple and efficient building solutions for Community FTTB

Use Petalinux 2017.1 to generate Zynq 7020 Linux Mirrors Problem phenomenon:1. Uboot Ethernet PHY rtl8211e works fine, but Linux cannot be found after startup eth02. Linux system startup prompt: MACB e000b000.ethernet:01 no PHY found Possible causes of the problem: Cadence MACB Linux Driver is not compiled into the kernel.Workaround: Configure the kernel to Cadence MACB Linux DriverPosition:-> Device Driver

Network Testing helps the development of Ethernet technology to mature, and more detailed tests will also help those who still have doubts about Ethernet technology to build confidence. Ethernet is evolving from 10 m to 10G, and various technical updates are constantly carried out. Of course, Ethernet's most important device-switch is changing with each passing d

Android Ethernet 1 from top to bottomRecently, many framework problems have been encountered, such as network port disconnection after startup. The network display icons in the status bar and settings are not updated, and the dual network port needs to be removed, this article describes the top-to-bottom framework structure of Ethernet. Due to limited capabilities and time, the analysis in this article is n

The air on the weekend was sultry, and the thought of it would never rain again. Every weekend, I will sum up all the things of the week, whether at work, in life, or on the way to and from work, or after reading, because it is no longer raining, I decided to have a good sleep on Saturday evening. When I explained the principles of vswitches and hubs to my colleagues, I thought that hub is a more efficient choice, what is the difference between iptables's simple cluster target and F5's high Serv

In Solaris, how to configure FCHBA to an Ethernet card, IPFC, can easily set an FCHBA card to an Ethernet card, which is of great significance in reality. In some work sites, if you need to copy a large amount of data through the network, it is often found that the speed of the Gigabit Nic is not enough ,... in Solaris, how to configure the fc hba to an Ethernet

This article describes the use of Pf_packet and Sock_raw to send themselves a defined type Ethernet packet, using the Wireshare capture packet to get to the packet and pave the line for adding a network protocol to the Linux kernel.First on the code:#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define Eth_p_dean 0x8874//self-defined

First, about the minimum length of Ethernet packets in Wireshark, see the following text:Packet FormatA Physical Ethernet Packet would look like this: preamble destination MAC address source MAC address type/length user Data frame Check Sequence (FCS) 8 6 6 Span style= "font-size:15px;" >2

Its UNIX systemschanging Ethernet Media speed for AIXFirst you need to find out the device name of your Ethernet card. It should is ent0 if the machine had only 1 Ethernet card. Otherwise, it may be a higher number.You can determine the legal values for the media speed of the card by running the following command (where the value of the May is different if y

Http://www.cnblogs.com/blockchain/p/7943962.html Directory 1 Distributed Network Introduction Introduction of 1.1 Kad network 1.2 Kad network node distance 1.3 K Barrel 1.4 Kad Communication protocol 2 Neighbor Nodes Main members of the 2.1 nodetable class 2.2 Neighbor Node Discovery method 2.3 Neighbor node network topology and refresh mechanism. 1 Distributed Network Introduction Ethernet Square bottom of the distributed network is Peer-to-peer n

In the switched Ethernet environment, the communication between the two workstations is not heard by the third party. In some cases, we may need to do such listening, such as protocol analysis, traffic analysis, intrusion detection. For this we can set the span (switchedportanalyzer Switch Port Analyzer) feature of the Cisco switch, or the early "port mirroring", "Monitoring port" feature. The object that the listens to can be one or more

Because the single interface between Ethernet devices only provides one network segment, the transmission interface must be set as the receiving interface for OSPF, which prevents OSPF from sending a hello packet to the transmission interface. The two devices can reach each other through the hello packets sent to the receiving interface. To configure the OSPF ticket Ethernet interface, run the following co

Fluke Networks (Fluke Network) has launched an ethernet cable tester "DTX-1800", in addition to the widely used "5e" line, it can also be used to detect "6" and "7" lines with better transmission characteristics. You can check whether the cables used as the measurement object meet the corresponding specifications. The testing frequency is up to 900 MHz. Reduce the testing time of the "6" line to 12 seconds, less than 4300 of the latter, compared to ab