What are the network classifications?

Question 1: What are the types of networks? 1. Depending on the geographical location of the network, 1. Local area network: generally confined to a small area, less than 10km, usually wired.

2. Metropolitan Area Network (man): The scale is limited to one city, with an area of 10 ~ 100 km.

3. Wide Area Network (wan): The network crosses national boundaries, continental boundaries and even the global scope.

At present, local area network and wide area network are hot spots of the network. Local area network (LAN) is the basis of the other two types of networks, and metropolitan area network (MAN) has generally joined the WAN. The typical representative of WAN is the Internet.

4. Personal Area Network (PAN): Personal Area Network is a network that connects personal electronic devices (such as portable computers) with wireless technology in personal workplaces, so it is usually called wireless personal area network (WPAN), and its range is about 1 0mm ... 2. According to the classification of transmission media1. Wired network: a computer network connected by coaxial cable and twisted pair.

Coaxial cable network is a common networking mode. Economical and practical, easy to install, average transmission rate and anti-interference ability, short transmission distance.

Twisted pair network is the most common networking mode at present. It is cheap and easy to install, but it is easy to be disturbed, with low transmission rate and shorter transmission distance than coaxial cable.

2. Optical fiber network: Optical fiber network is also a kind of wired network, but it is listed separately due to its particularity. Optical fiber is used as a transmission medium. Optical fiber has long transmission distance, high transmission rate, up to several gigabits, strong anti-interference, and will not be monitored by electronic monitoring equipment, so it is an ideal choice for high-security networks. However, due to its high price and high installation technology, it has not been popularized so far.

3. Wireless network: using air as transmission medium and electromagnetic wave as carrier to transmit data. At present, the cost of wireless networking is high, and it is not very popular. However, due to its flexibility and convenience, it is a promising networking mode.

LAN usually uses a single transmission medium, while MAN and WAN use multiple transmission media. Third, according to the topological structure of the network, the topological structure of the network refers to the geometric arrangement of communication lines and stations (computers or equipment) in the network.

1. star network: each station is connected to the central station through a point-to-point link. It is easy to add new sites in the network, the security and priority of data are easy to control, and network monitoring is easy to realize, but the failure of the central node will lead to the paralysis of the whole network.

2. Ring network: stations are connected into a closed ring through communication media. Huanyi is easy to install and monitor, but its capacity is limited, so it is difficult to add new sites after the network is completed.

3. Bus network: All stations in the network share a data channel. Bus-type network is simple and convenient to install, with the shortest cable laying and low cost. Generally, the failure of one site will not affect the whole network. However, media failure will lead to network paralysis, low bus network security, difficult monitoring, and it is not as easy to add new sites as Starnet.

Tree network, cluster star network and mesh network are all based on the above three topologies. 4. Classification by communication mode 1. Point-to-point transmission network: data is transmitted in a point-to-point manner in a computer or communication device. Both star networks and ring networks use this transmission mode.

2. Broadcast transmission network: data is transmitted in ordinary media. Both wireless networks and bus networks belong to this type.

Edit paragraph 5. Classify 1 according to the purpose of network use. Shared resource network: users can share various resources in the network, such as files, scanners, plotters, printers and various services. Internet is a typical network of shared resources.

2. Data processing networks: networks used to process data, such as scientific computing networks and enterprise management networks.

3. Data transmission network: a network used to collect, exchange and transmit data, such as an information retrieval network.

At present, the purpose of network use is not unique. 6. Classification by service mode 1. Client/server network: the server refers to a high-performance computer or special equipment that provides services exclusively, and the client is a user computer. This is a network form in which clients send requests to the server and get services. Multiple clients can share various resources provided by the server. This is the most commonly used and important network type. It is not only suitable for similar computer networking, but also suitable for different types of computer networking, such as > >

Question 2: What are the classifications of computer networks? There is no strict classification of computer networks. People are mainly divided into the following categories according to different ways: 1. Dividing local area network according to network coverage.

metropolitan area network

Wan road

internet

Bus network

star network

loop network

tree network

hybrid network

cable network

wireless network

Public network

special network

Question 3: What are the classification methods of networks? Depending on what you say, computer networks can be classified according to different standards.

(1) According to the distribution of network nodes, it can be divided into local area network (LAN), wide area network (WAN) and metropolitan area network (MAN).

Local area network is a kind of computer network realized in a small area, generally in a building, or in a factory or a public institution, which is unique to the unit. The distance of local area network can be less than 10 kilometers, and the channel transmission rate can reach 1~20Mbps, with simple structure and easy wiring. Wide area network is very wide and will be distributed in a province, a country or several countries. WAN channel transmission rate is low, generally less than 0. 1Mbps, and its structure is complex. MAN is a computer information network built in a city, which provides information services for the whole city. At present, many cities in China are building metropolitan area networks.

(2) According to the switching mode, it can be divided into circuit switching, message switching and packet switching.

Circuit switching first appeared in the telephone system, and early computer networks used this method to transmit data. Digital signals can only be transmitted on the line after being converted into analog signals. Information exchange is a digital network. When communication starts, a message sent by the source machine is stored in the switch, and the switch selects the appropriate path to send the message according to the destination address of the message. This mode is called store-and-forward mode. Packet switching also uses message transmission, but it is not the basic unit of variable-length message transmission, but divides a long message into many fixed-length message packets, with packets as the basic transmission unit. This not only greatly simplifies the management of computer memory, but also accelerates the spread of information in the network. Because packet switching has many advantages over circuit switching and message switching, it has become the mainstream of computer networks.

(3) According to the network topology, it can be divided into star network, tree network, bus network, ring network and mesh network.

Question 4: What are the specific classifications of network technologies? What you said is really hard to tell. They are not a classification standard.

In fact, the largest scope can be divided into one, software two, and hardware.

The software includes programming, graphic design and image processing. What you said later, photoshop, flash and 3dmax are all tools for image processing. As for the C language you said, it is a programming language, and it can also be said to be a tool.

Hardware is what really exists on the computer, that is, your chassis, power supply, motherboard, hard disk, mouse, keyboard and other things you can see.

You can learn to repair these things or learn to sell them. Of course, the premise of selling these things is that you understand, hehe, so you have to start by understanding these things. At present, I think what you should learn is to understand the most basic things, the hardware composition and usage of the computer, and then choose what you want to learn. The thing about hardware is that you know how to repair it. If you go to a higher level, you know how they operate, but you can already make money with it after you repair it.

Let's talk about software again. I studied software development, that is, programming. A program is software, and I feel like I'm talking nonsense. I don't know how much you know about it You should be able to understand what I said. If you don't understand, I suggest you don't blindly start choosing the direction you want to learn, because you haven't started yet. ) But you are right now. Image processing is useful in both big cities and small cities.

Let's talk about computer application, computer network, computer multimedia, computer information management, computer software technology and so on. These are usually courses offered by universities. I studied computer software technology in college, mainly software cards (that is, programming). These are all written languages. In fact, there is no main direction of computer application. I learn everything and know nothing. In other words, it is difficult for you to find a job in society because you know nothing. Computer multimedia is used to do some multimedia technologies, such as flash and pictures. You need this for advertising. You see, advertisements, audio, images and animations are all multimedia. This is more interesting. The ratio of boys to girls is not balanced. Learning software is terrible. There are 30 people in our class. All departments 150 people, less than 30 women, few beautiful. Hehe, these are all jokes, but they are all true. Image processing is a technology that makes pictures beautiful and clear. Special occupations need this technology, such as photo studios (provided that you learn well), and the main workplace of computer networks is Internet cafes. Personally, if it is not a big school, there is little chance to be their network administrator in a big company, but it depends on your hobbies. Information management is engaged in database, which is closely related to software development. I am not sure about the application of electronic technology. It should feel similar to computer application technology. Communication technology is related to mobile and China Unicom, and I don't know what to learn specifically.

Finally, to sum up, learning software and hardware is very good. The key is to see which one you like, but only if you know a little about both. According to the naivety of asking this question, you still need to study what a computer is and its development history. Thank you.

Question 5: What are the types of computer networks? Computer network is a system in which many computers are connected together. It can realize mutual information exchange and share computer resources among computers.

According to the switching function of the network, it can be divided into: (1): circuit switching, message switching, packet switching and hybrid switching;

(2) According to the topological structure of the network, it is divided into bus structure, star structure, ring structure and cellular structure (which is produced with the emergence of wireless communication technology);

(3) Classification by scope of action: local area network (LAN), wide area network (WAN) and metropolitan area network.

The first recognized and most successful remote computer network in the world is in 1969. Before the mid-1960s, the first generation computer network was a remote online system centered on a single computer. The typical application is the aircraft reservation system composed of a computer and more than 2000 terminals in the United States. Later, the second generation computer network was based on the interconnection of multiple hosts through communication lines to provide services for users, which rose in the late 1960s. The third generation computer network developed rapidly from the late 1970s to the 1990s, resulting in two most important international architectures, namely, the TCP/IP architecture of the International Organization for Standardization and the OSI architecture.

Features:

1. Strong timeliness

2. Widely spread

3. Multimedia information

4. Hyperlinks that break through linear restrictions

Step 5 increase interactivity

6. Flexible communication methods

The biggest feature is the interactive communication of the network. Yang Yang, Xiaoxiang Team Communication Branch, sincerely serves you and helps you solve your problems! May you have a comfortable and warm good mood! O(∩_∩)O~. (Working in the First Bureau of China Communication Construction Project, the guarantee of authority)

Question 6: What are the classification methods of networks? What kind of network Ethernet belongs to depends on what you say. Computer networks can be classified according to different standards.

(1) According to the distribution of network nodes, it can be divided into local area network (LAN), wide area network (WAN) and metropolitan area network (MAN).

Local area network is a kind of computer network realized in a small area, generally in a building, or in a factory or a public institution, which is unique to the unit. The distance of local area network can be less than 10 kilometers, and the channel transmission rate can reach 1~20Mbps, with simple structure and easy wiring. WAN covers a wide range and can be distributed in a province, a country or several countries. WAN channel transmission rate is low, generally less than 0. 1Mbps, and its structure is complex. MAN is a computer information network built in a city, which provides information services for the whole city. At present, many cities in China are building metropolitan area networks.

(2) According to the switching mode, it can be divided into circuit switching, message switching and packet switching.

Circuit switching first appeared in the telephone system, and early computer networks used this method to transmit data. Digital signals can only be transmitted on the line after being converted into analog signals. Information exchange is a digital network. When communication starts, a message sent by the source machine is stored in the switch, and the switch selects the appropriate path to send the message according to the destination address of the message. This mode is called store-and-forward mode. Packet switching also uses message transmission, but it is not the basic unit of variable-length message transmission, but divides a long message into many fixed-length message packets, with packets as the basic transmission unit. This not only greatly simplifies the management of computer memory, but also accelerates the spread of information in the network. Because packet switching has many advantages over circuit switching and message switching, it has become the mainstream of computer networks.

(3) According to the network topology, it can be divided into star network, tree network, bus network, ring network and mesh network.

Question 7: What is the classification of computer networks? Computer networks can be classified according to different standards.

(1) According to the distribution of network nodes, it can be divided into local area network (LAN), wide area network (WAN) and metropolitan area network (MAN).

Local area network is a kind of computer network realized in a small area, usually in a building, or in a factory or a public institution, which is unique to the unit. The distance of local area network can be less than 10 kilometers, and the channel transmission rate can reach 1~20Mbps, with simple structure and easy wiring. WAN covers a wide range and can be distributed in a province, a country or several countries. WAN channel transmission rate is low, generally less than 0. 1Mbps, and its structure is complex. MAN is a computer information network built in a city, which provides information services for the whole city. At present, many cities in China are building metropolitan area networks.

(2) According to the switching mode, it can be divided into circuit switching, message switching and packet switching.

Circuit switching first appeared in the telephone system, and early computer networks used this method to transmit data. Digital signals can only be transmitted on the line after being converted into analog signals. Information exchange is a digital network. When communication starts, a message sent by the source machine is stored in the switch, and the switch selects the appropriate path to send the message according to the destination address of the message. This mode is called store-and-forward mode. Packet switching also uses message transmission, but it is not the basic unit of variable-length message transmission, but divides a long message into many fixed-length message packets, with packets as the basic transmission unit. This not only greatly simplifies the management of computer memory, but also accelerates the spread of information in the network. Because packet switching has many advantages over circuit switching and message switching, it has become the mainstream of computer networks.

(3) According to the network topology, it can be divided into star network, tree network, bus network, ring network and mesh network.

Question 8: What are the classifications of current networks? 1. Composition and classification of computer networks Generally speaking, computer networks are formed by physically (or logically) connecting multiple computers (or other computer network devices) through transmission media and software. Generally speaking, the composition of computer network basically includes four parts: computer, network operating system, transmission medium (which can be tangible or intangible, such as the transmission medium of wireless network is air) and corresponding application software. To learn the network, we must first understand the current main network types, and distinguish which ones are necessary for our junior scholars and which ones are the current mainstream network types. Although there are various standards for the classification of network types, geographical division is recognized as a general standard for network classification. According to this standard, various network types can be divided into four types: local area network, metropolitan area network, wide area network and Internet. Generally speaking, LAN can only be located in a small area, and MAN is the interconnection of different regional networks. However, it should be noted that the network division here is not strictly defined by geographical scope, but only a qualitative concept. The following briefly introduces these kinds of computer networks. 1。 Local area network; ; LAN) Usually our common "LAN" refers to the local area network, which is our most common and widely used network. Nowadays, with the development and perfection of the whole computer network technology, LAN has been fully applied and popularized. Almost every unit has its own local area network, and some even have their own small local area network at home. Obviously, the so-called local area network, that is, the network in a local area, covers a small area. There is not much restriction on the number of computers in the local area network, from two to hundreds. Generally speaking, in an enterprise LAN, the number of workstations is about tens to 200. Generally speaking, the geographical distance involved in the network can be within a few meters to 10 km. Local area network is generally located in a building or a unit, and there is no routing problem, excluding the application of network layer. This kind of network is characterized by narrow connection range, few users, easy configuration and high connection rate. At present, the fastest speed of local area network is 10G Ethernet. IEEE's 802 Standard Committee has defined various major local area networks: Ethernet, Token Ring, Fiber Distributed Interface Network (FDDI), Asynchronous Transfer Mode Network (ATM) and the latest wireless local area network (WLAN). These will be introduced in detail later. 2。 Metropolitan area network; ; MAN) This kind of network is generally the interconnection of computers in a city, not in the same geographical area. The connection distance of the network can reach 10 ~ 100 km, and the IEEE802.6 standard is adopted. Compared with LAN, MAN extends farther and connects more computers, which can be said to be an extension of LAN network in geographical scope. In big cities or metropolitan areas, a MAN is usually connected to multiple LANs. For example, a local area network connecting institutions, hospitals, telecommunications, companies and enterprises. Due to the introduction of optical fiber connection, high-speed LAN interconnection in metropolitan area network becomes possible. Most metropolitan area networks use ATM technology as the backbone network. ATM is a high-speed network transmission method for data, voice, video and multimedia applications. ATM includes an interface and a protocol, which can switch between constant bit rate and variable traffic on the conventional transmission channel. ATM also includes hardware, software and media that conform to ATM protocol standards. ATM provides scalable backbone infrastructure to adapt to networks of different sizes, speeds and addressing technologies. The biggest disadvantage of ATM is its high cost, so it is generally used in metropolitan area networks, such as postal services, banks and hospitals. 3。 Wide area network; ; WAN) This kind of network is also called long-distance network, which covers a wider area than people. Generally, it is the interconnection of local area network or metropolitan area network between different cities, and the geographical range can range from several hundred kilometers to several thousand kilometers. Because of the long distance and serious information attenuation, this kind of network usually needs to rent a private line and connect with the line through IMP (Interface Information Processing) protocol to form a mesh structure to solve the routing problem. Because there are many users connected to this MAN, the total exit area is > >