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Before learning the article "Spanning Tree Protocol STP of CCNA learning notes", we need to know what STP is? STP defines 1.STP( Spanning Tree Protocol) as a layer-2 link management protocol. Its main function is to provide redundant paths in Layer 2

The port connected to the server after the client establishes a TCP/IP connection with the server and closes the SOCKETStatus: TIME_WAIT Is it true that all sockets that execute active shutdown will enter the TIME_WAIT status?Is there any situation

In the current data center solution, L2 multi-path should be a general trend, which can eliminate loops and provide multi-path load. However, in the L2 multi-path mode, the gateway is rarely set up in the current solution, and some information is

Friends who have used keepalived know that when we set the virtual ipaddress address of keepalived (vip), we usually use three addresses with the same vip network segment. The problem is that if there are multiple projects (vip) multiple public ip

Principle 1: VLAN Based on ports-physical ports on VLAN switches and internal PVC (permanent virtual circuit) ports. Advantage: it is easy to define VLAN members. You only need to define all ports as corresponding VLAN groups. Disadvantage: if a

Pop3 protocol analysis POP3 mail server provides POP3 service by listening to TCP port 110. Before the client software reads the email, it needs to establish a TCP connection with the server in advance. After the connection is successful, the POP3

PPP protocol details DTE: data terminal device (the purchased device is DTE) DCE: Data circuit final device (the carrier sends DCE) Configure PAP AuthenticationPPP authentication: PAP and CHAP. 1. Configure the DCE of the master authentication. Add

STP protocol analysis Switch (cofnig) # spanning-tree vlan 1 enable spanning tree Switch (config) # spanning-tree vlan 2 root primary/secondary configure the Switch as the root bridge, the primary/secondary Switch (config) # spanning-tree vlan 2

I have read a lot of articles about LVS deployed in LVS/DR mode on the Internet with a public IP address. When I select two modes: LVS/DR and LVS/NAT, many people think that multiple public addresses must be used in the DR model. This is what I

Overview of IPV4 datagram Transfer Process /********************************* ************************************ Author: samson * Date: 07/13/2012 * Test platform: * GNU Linux version BRL. 29.4 * gcc version 4.4.0 20090506 (Red Hat 4.4.0-4) (GCC)

Which types of commonly used wireless network encryption protocols are described in this article, currently, the widely used wireless network encryption protocols mainly involve WEP encryption protocols and WPA encryption protocols. The following is

I. Networking requirements: All switches run OSPF and divide the entire autonomous system into three areas. Switch A and Switch B serve as the routes between the zones forwarded by the API. After the configuration is complete, each vswitch should

Introduction to the key protocols in the WAN Protocol the WAN protocol is relative to the LAN protocol, and we can regard the Internet as a wan. Then the related protocols are well understood. It is inseparable from the OSI model. Below are some

When talking about the Internet, IP addresses cannot be mentioned because IP addresses are a very important concept from the perspective of learning and using the Internet, many INTERNET services and features are reflected by IP addresses. I.

Solution to IP address conflict-dhcp snooping uses DHCP to assign IP addresses to users and restrict these users to dynamic IP addresses, if it is changed to a static IP address, the network cannot be connected; that is, the dhcp snooping function

To improve network data transmission efficiency and reduce page loading time, we performed network link optimization a year ago. We mainly modified Linux kernel parameters such as congestion window and slow start according to network conditions and

How to Implement EAP Authentication (Extended Authentication Protocol) in Radius Protocol is located in PPP Authentication Protocol, and provides a general framework for different Authentication methods. EAP is used to pass authentication

By default, the ospf router in the OSPF region does not generate a default route even if it has a default route. When the default route in the network is generated by another routing process, you must be able to advertise the default route to the

Adjust and diagnose Spanning tree Protocol Note (BCMSN) Bpdu guark: Spanning-tree portfast bpduguard diagnoses ports in portfast status. portfast ports generally do not accept bpdu packets, after configuration, when it receives the bpdu data packet,

HTTP packets are text-oriented. Each field in the packet is an ASCII string, and the length of each field is uncertain. HTTP has two types of packets: Request Message and Response Message.Request MessageAn HTTP request Message consists of four parts: