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Broadband and Dial-up

We used to use ADSL broadband. ADSL: Asymmetric Digital Subscriber Line. Broadband is used by connecting a phone line from your broadband carrier to your indoor modem (commonly known as a cat) and then using the cable to connect to other Internet-connected devices.  After years of development, AD... Read More

The Difference between protocol and protocol stack

 The definition of the protocol is the communication label of the column, the two sides of the communication need to jointly carry out the normal data transmission according to this standard. In computer communication, the communication protocol is used to realize the labeling between the compute... Read More

VLAN Isolation Function of Ethernet Switch

Before understanding the VLAN isolation function of the switch, we first understand the Ethernet switch: Ethernet switch is a switch based on Ethernet data transmission. Each port of the Ethernet switch can be connected to the host, generally working in full-duplex mode, and can be connected to t... Read More

Transfeceiver LFP and FEF Function

 Optical fiber transceiver is a flexible and effective photoelectric conversion device that plays an important role in multi-protocol photoelectric hybrid LAN. Now, in order to better detect and eliminate link faults, some optical fiber transceivers have link fail over (LFP) and remote fault (FEF... Read More

VLAN ” Virtual LAN

The VLAN (Virtual Local Area Network) is named in Chinese. A VLAN divides a physical LAN into multiple logical LANs, and each VLAN is a broadcast domain. Hosts in VLAN can communicate with messages through the traditional Ethernet communication mode, but between hosts in different VLAN, communica... Read More

The Calibration of the Optical Power Mete

For optical communication, testing the optical power is an essential step in building the optical environment. The level of optical power affects the performance of the receiving device. Too low light power will make the device impossible to identify, and too high light power will damage the devi... Read More