Series of Articles
Chapter 1 Introduction to Huawei Datacom (1)
Article Directory
- Series Article Directory
- foreword
- 1. What is Huawei Datacom?
-
Table of contents
Series of Articles Chapter 1 Introduction to Huawei Datacom
2. Know the Huawei device icon
Third, understand the iterative history of communication equipment
3. The switch appeared (there was a direct connector before, so we won’t introduce it here)
4. Enterprise-class routers appear
Fourth, what is the nature of communication?
Summary: The essence of communication is "resource sharing"
6. Common terminology of the network
7. The essence of data communication network is resource sharing
11. The difference between the network
13. Differences in network topology
Summary : It is suitable for datacom beginners to see the introduction of Huawei Datacom. If you see it, please correct me.
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foreword
With the continuous development of Huawei, the technology of data communication is becoming more and more important. Many people have started learning data communication. This article introduces the basic content of Huawei data communication.
提示：以下是本篇文章正文内容，下面案例可供参考
1. What is Huawei Datacom?
Huawei Datacom refers to Huawei's data communication . Now Huawei Datacom products generally refer to high-end routers, core switches, SDH series, etc., mainly for core networks and transmission networks. The customer base may also be major customers such as operators and financial companies. Mainly.
2. Know the Huawei device icon
If you want to be a Huawei network engineer, the first step is to know the device icon
Third, understand the iterative history of communication equipment
1. Early self-communication
Early computers were invented without communication requirements, and only needed to communicate with themselves. Early scientists used computers to calculate scientific experiments, etc.
2, end-to-end communication
Later, because large organizations such as the government and the military had file transfer needs, end-to-end communication construction was started, and the interconnection of computers began.
3. The switch appeared (there was a direct connector before, so we won’t introduce it here)
With the popularization of computers in enterprises, the end-to-end connection obviously does not meet the needs of enterprises, so switches appear. The characteristics of switches are many expansion ports and high port density, but there are disadvantages. The disadvantage is that the interface is too large. Many, the impact of collision domain and broadcast domain is too large
4. Enterprise-class routers appear
Because of the shortcomings of switches, enterprise-level routers appear. The advantage of enterprise-level routers is that they have fewer ports and isolate the broadcast domain on the interface.
5. A Layer 3 switch appears
Enterprise-level routers are good but the price is too expensive, so there are three-layer switches, which combine the functions of enterprise-level routers and switches
Fourth, what is the nature of communication?
1. Why communication
In order to solve the interaction between people and the outside world in daily life, so that people can live in this world better.
2. What is communication
Communication is the transmission of information between people and people, between people and things, and between things and things through media and behavior.
3. How to communicate
Our daily language communication, written words, body behavior, etc.,
Summary: The essence of communication is "resource sharing"
5. Network communication
Network communication refers to the communication between terminal devices through a computer network.
The process of information transmission is the same. The process of express delivery we come into contact with daily is the same as the process of information transmission in the network.
6. Common terminology of the network
Take express delivery as an example
The data payload is the express body we want to send
The message is the basic composition of the express delivery we deliver, which means to turn one express delivery into one piece, and each piece is a basic unit.
The head and the tail are the courier documents we stick on the courier, but one is in front of the data unit and the other is behind the data unit
Encapsulation means that we need to give the courier a shell, with the head and tail attached to the shell
Unpacking means that we disassemble the express shell to get the express inside
The gateway is similar to the courier gathering point in our county or city, which determines the transshipment and collection of courier
The router is equivalent to the courier station around us, we need to send courier through it
The terminal equipment is equivalent to ourselves
Inform (the examples are established for the convenience of understanding, some of which are not fully explained)
7. The essence of data communication network is resource sharing
Eight. Know the switch
Summary:
The role of the switch: to provide more interfaces so that terminals can be connected to the network. (Unless specifically stated here, switches refer to Layer 2 switching.)
9. Know the router
Summarize:
The role of the router: addressing and forwarding, looking up the routing table according to the target network segment, forwarding or discarding.
Routing protocols run on Layer 3 devices
Path selection is to choose the most suitable and convenient path according to the routing table
There is still nat technology, that is, network address translation
10. Know the firewall
Summarize:
The function of the firewall: not only has the function of the third layer of the router and the second layer of the switch, but also has a unique security function.
11. The difference between the network
1. LAN MAN WAN
The definition and scope of the three network types of LAN, MAN, and WAN are relative concepts.
2.AP and AC
Wireless AC: It can control thin APs in a large range. Because the functions in thin APs are not complete, it is not necessary to configure APs one by one.
Wireless Fat AP: It is the router used in our home, the content inside is already configured,
12. Network Topology
Network topology: which cables are connected between network devices and combined into shapes. A map inside network engineering.
13. Differences in network topology
Network topology is divided into logical topology and physical topology:
1. Logical topology: The connection between devices does not have to be displayed. You can choose whether to display it according to its function. For example, if the function of switch is transparent transmission, you can choose to ignore it or not to draw it.
2. Physical topology: how devices are connected, regardless of whether the devices function or not, must be displayed truthfully. This type of topology is called physical topology.
Summarize
This article only briefly introduces some knowledge of Huawei Datacom. If there are any mistakes, please correct me.