network objectives

permissions, and operation functions. For security purposes, the CISCO user interface has two levels of access permissions: user level and privilege level. The first-level access allows you to view the Route status, which is called the user EXEC mode and the view mode. The second-level access allows you to view router configurations, modify configurations, and run Debugging commands, which are called the Privileged EXEC mode, it is also called the configuration mode. In the privileged level, yo

One, Win10 can't connect to this network what's going onFor the majority of people who are unable to connect to this network problem, mainly Win10 laptop users, using a wireless network. While the WIN10 connection other wireless network is normal, but is a wireless network c

The access network system is widely used and has been well developed in various fields. It also plays an important role in cable TV return. After more than 20 years of development, China's cable TV network line is now more than 3 million kilometers in length, the optical fiber trunk line reaches 0.26 million kilometers, and nearly 2000 counties have opened cable TV, among them, more than 600 counties have i

The network administrators started their brains and summed up a lot of network troubleshooting skills. However, by carefully reviewing these skills, we can see that some of the troubleshooting skills are performed on the Windows interface. Although these tricks are more convenient for users, it can also effectively improve the efficiency of network troubleshootin

Part 1: Network principle: 1. network addressing (mainly using IP address addressing) 1. IP address addressing is a two-layer addressing solution. an IP address identifies a host (or a Nic interface) 2. Currently, IPv4 addressing is the most widely used address. Part 1: Network principles: 1. network addressing (mainly

Article title: Linux network basic network configuration method introduction. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. View network information View network interface informa

A layer-3 network is a layered layer-3 network. The three-tier network architecture adopts a hierarchical model design, which divides the complex network design into several layers. Each layer focuses on some specific functions, in this way, a complex big problem can become many simple small problems. The three-tier

Get Network Connection StatusWith the promotion of 3G and WiFi, more and more Android applications need to call network resources and detect the network connection status becomes the necessary function of network application.The Android platform provides the Connectivitymanager class for detection of

Network troubleshooting and viewing in linux, and network troubleshooting in linux Basic troubleshooting errors Troubleshooting must be simple and complex. Some people repeatedly configure the above files, but they cannot access the network. They always think that the system is faulty and want to reinstall the host. The results showed that the original

This article is from the "Knowledge Forest" Three networks (Docker network LS) are default when the Docker service is successfully installed: C:\users\zsl-pc>docker Network LS network ID NAME DRIVER SCOPE 992344cd89fe Bridge Bridge local 06445f4f5774 host host local 2d964ece79b9

1 Repeater A repeater (repeater) is a network device located on the first layer (physical layer). As the cables pass through more and more longer, the signal becomes weaker. The purpose of the repeater is to regenerate and re-timer the network signal at the bit level . which allows them to transmit longer distances over the network. Repeaters only work on a high

"Speed test" can be explained in many ways, in the Internet people's point of view is mainly concerned with the Internet access to network resources. To this end, there are a number of websites that also provide test scripts and services that test the speed of access from visitors to the site. This test method is very simple, but due to many factors, test results are generally only as a specific application to access this particular site (such as: HTT

[Network] The hierarchy principle of computer networks a series of agreements on the hierarchy and implementation of computer networks in terms of communication between computer networks A set of protocols at different layers. OSI hierarchy principle according to different levels of abstraction hierarchy each layer should implement a clearly defined function each layer selection should help to develop international standards for

Note: This note is written from the programming perspective, that is, the content is something I think is helpful for programming, rather than from the perspective of a network professional knowledge. The Comparison of Different Computer Architectures: OSI Layer-7 protocol architecture, TCP/IP architecture, and five-layer protocol architecture: It indicates the changes in the data transmitted by the application process at each layer. It indicates the

From the perspective of the current network development trend, we can tell that in the future, enterprises will face serious network security threats, such as Trojans, viruses, and worms. At the same time, spyware attacks also speed up the spread. In order to better control enterprises' network access from undesirable devices or devices infected with malicious co

As a common Internet user, sudden network faults have a headache. They not only affect our use, but also cause unnecessary losses, therefore, simply understanding the basic network test commands is also a good thing for us, saving time and improving work efficiency. Today, I would like to list some of the most common network failure test commands for your referen

Faults are inevitable during network management and O M. If an administrator attempts to build a zero-fault network, it will be futile. There are too many randomness and contingency factors in network faults, not to mention human factors. Therefore, what administrators need to do is to master the network troubleshooti

[Network layer] network layer Overview 1. What are the differences between the two service virtual circuits and the datagram service provided by the network layer? Virtual circuit datagram connection must be established. Do not use the destination site address. It is only used during connection establishment, each group uses a short virtual circuit number. Each g

　　Network programming refers to writing programs that communicate with other computers. Java has encapsulated the things that a network program needs into different classes. Whenever you create objects of these classes, use the appropriate method.1. LAN and InternetTo enable communication between two computers, you must connect two computers with one network line

Overlay NetworkOverlay network is a new data format that encapsulates two beginning text over an IP message without altering the existing network infrastructure, through some kind of protocol communication.This will not only take full advantage of the mature IP routing protocol process data distribution, but also in the overlay technology, the use of extended isolated identity bits, can break the VLAN 4000