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Fault symptom:One or more websites cannot be opened, and other websites are normal. For example, Sina websites cannot be opened, and other websites are normal.Cause analysis:This problem may be caused by network server problems, machine setup

1 Introduction Remote Authentication Dial-Up User Service protocol Remote Authentication Dial In User Service, RADIUS) was initially proposed by Livingston to provide Authentication and billing for Dial-up users. After many improvements, it

Lab objectives:1. Master the configuration of the switch Tag VLAN;2. master the basic configuration methods of layer-3 switches;3. Master how to configure VLAN routing for layer-3 switches;4. layer-3 switches are used to implement VLAN visibility

 1. Problem Description The IP address on the switch is bound to the MAC address to establish an access control list. Only approved PCs can access the network.   2. Solutions Create an access control list > System-view: enters

Cisco 2950 switch VLAN division first configure the switch SC-2950> SC-2950> enSC-2950 # conf tEnter configuration commands, one per line. end with CNTL/Z.SC-2950 (config) # config-register 0x2102SC-2950 (config) # endAdd three VLANSC-2950 # vlan

Brocade 300 optical end switch zone division we are here the brocade optical end switch, in fact, the manufacturers are the same, where is the principle, according to the principle and architecture to divide the zone. Of course, the graphic

Layer-3 Switch ACLs are used to isolate different VLANs. Create three VLANs: vlan10 vlan20 vlan30 www.2cto.com PC1 PC3 vlan10 PC2 PC4 vlan20 PC5 vlan30Vlan10 vlan20 vlan30 cannot communicate with each other but can access the Internet Pc1: 172.16.10.

We can use the agent service for SNMP protocol. The SNMP protocol proxy has many advantages, and there are also many disadvantages. Next we will explain the content in this regard. First, let's discuss the basic information. Many proxies on the

The suspicious snmp service is reflected in many software. So we will introduce the Cacti software today. Now I will give a brief introduction to some functions and operations of this software. The Cacti Chinese version is a software implemented in

The telnet command can effectively control vrouters and vswitches. In the previous article, we also explained some batch processing problems. Today, we will explain how to set up a vrotelnet for Cisco. As shown in, enter the Telent command, and then

In the process of establishing a session, we must apply it to the SIP protocol. Some friends may not understand this agreement. It doesn't matter. Here we will explain the content of this Protocol. You may be familiar with the SIP protocol. The

After learning the network protocols for a while, I believe you have some knowledge about some common network protocols. Here we will mainly introduce the content of the SOAP protocol. SOAP Protocol: Simple Object Access Protocol (SOAP), Simple

Virtual Private Network (VPN) is defined as a temporary and secure connection established through a public Network (usually the Internet, is a secure and stable tunnel through the public network. Virtual Private Network is an extension of the

Network ProtocolThe format of data transmitted over the network. ForNetwork ProgrammingFor beginners, it is not necessary to have a deep understanding of TCP/IP protocol clusters. Therefore, it is not very appropriate for beginners to read the

On Campus Networks, the most convenient way to disrupt is to steal others' IP addresses. Computers with stolen IP addresses are not only unable to use the campus network normally, but also frequently prompt the dialog box when IP addresses are

The wireless LAN network transmits signals through microwave, so the signal transmission security of the wireless LAN makes many wireless Internet users a little worried. In fact, as long as they are familiar with the signal transmission mechanism

1 Introduction Nowadays, delay lines have been widely used in signal processing, radar, electronic countermeasure, and other fields. For example, the Unit delay device required for signal processing is a kind of memory, and the dynamic target

Summary As the LAN speed increases, the transmission capability of the cabling system will depend on the outstanding performance of all components in the cable and LAN channels. End-to-End cabling system manufacturers are not manufacturers of

There are still many things worth learning about integrated network cabling. Here I will mainly explain to you how network cabling works in integrated network cabling, this includes network cable Testing, one-by-one enabling of computers, "Hot

Introduction to computer network structured Integrated Wiring System StructuredCablingSystem (SCS) is a module system based on star topology developed by Bell laboratory experts for many years. It is also the preferred system for LAN construction.