What is a peer-to-peer network? What advantages does it have compared with other network forms? When is the most suitable time?
A: If you have used direct cable connection, you must think it is just a means of communication. Only one party can access the other party at a time, specifically, only the client can access the host. In order for the host to access the client, the direct cable connection must be reset so that the host/client position can be replaced to achieve the goal. Obviously, this is only a temporary means of communication, not a long-term strategy; Peer-to-peer networks are more advanced than direct cable connections. It is not only convenient to connect more than two computers, but more importantly, the relationship between them is equivalent. After the connection, the two sides can visit each other, and there is no class difference between subject and object. However, the peer-to-peer network still can't * * enjoy the executable program. Only by upgrading to the local area network with client/server structure can we * * * enjoy the executable program on the server. Of course, such a network needs to sacrifice a high-performance computer as a server in the network for everyone to enjoy. This computer can't be used by anyone for personal application purposes, and it needs to be maintained by a special person (network system administrator), and the cost (manpower and funds) will increase greatly. Therefore, peer-to-peer network is a practical small network system with less investment, quick effect and high cost performance. If there is no special need, it is enough to establish a peer-to-peer network.
Peer-to-peer network is suitable for home, campus or relatively small office network, and the number of connected computers does not exceed 10. If more than 10 computers are connected to the peer-to-peer network, the performance of the network system will be reduced. Please use Win NT network or Novell network with client/server structure.
What kind of network structure can a peer-to-peer network generally adopt?
A: The popular network cabling topologies are bus type and star type.
Bus-based network is to connect all computers on a line and connect them with coaxial cables, just like several grasshoppers tied to a line, which is only suitable for peer-to-peer networks with few computers. Because a cable is out of order, other computers can't connect, which will cause the whole network to be paralyzed. The system should use BNC interface network card, BNC-T connector, terminator and coaxial thin cable.
The star network is connected by twisted pair, and the hub is the center of the structure to connect computers radially. Because there are many indicator lights on the hub, it is easy to find the faulty computer in case of failure, and the problem of one computer or line does not affect other computers at all, so the reliability of the network system is greatly enhanced. In addition, if you want to add a computer, you only need to connect to the HUB, which is convenient for expanding the network, so I recommend the star structure.
Question 2: What is the use of peer-to-peer network? 5. Computer network refers to the interconnection of autonomous computers. The uses of computer network include: sharing resources, providing powerful communication means, remote information access, entertainment, e-commerce, distance education, video conference and so on. According to the connection distance, the network can be divided into local area network (LAN), wide area network (WAN) and metropolitan area network (MAN).
The most common type of LAN is Ethernet. Usually, the connection between hosts in a local area network adopts star topology or ring topology.
The communication rules between peer-to-peer network entities are called protocols. The design of network protocols is hierarchical, and the * * * of layers and protocols is called network architecture. The interface between adjacent layers defines the basic operations and services provided by the lower layer to the upper layer. The services provided by the lower layer to the upper layer are divided into two forms: connection-oriented services and connectionless services.
There are two main network systems in computer networks: OSI reference model and TCP/IP reference model. OSI open system interconnect is formulated by the International Organization for Standardization (ISO).
The OSI reference model is divided into seven layers: physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.
TCP/IP reference model is the foundation of Internet. TCP/IP is the general name of a group of protocols, among which TCP and IP are the two most important protocols, and the TCP/IP system also contains other protocols. Compared with the 7-layer protocol of OSI, the TCP/IP reference model has no session layer and presentation layer. Internet Protocol IP(Internet Protocol) is the most important protocol in the network layer. Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are the most important protocols in the transport layer. TCP is a connection-oriented protocol that provides reliable services. UDP is an unreliable connectionless protocol.
Internet * * * is the Internet (English is the Internet), and the Internet refers to a specific worldwide Internet.
Intranet is a network based on TCP/IP protocol family belonging to an organization (such as a company). Only members of the organization (such as company employees) and authenticated users can access the intranet. From the technical and formal point of view, intranet and Internet are similar.
Firewall is a system to prevent unauthenticated information from entering or leaving the private network, which can be realized by hardware or software, or by a combination of the two. Generally, firewall is located between private network (intranet) and external network (Internet), which is the only entrance and exit of information between networks.
The extranet is actually an extension of the intranet. Extranet not only allows people inside the organization to access, but also allows authorized outsiders to access some of its resources.
Question 3: What is a peer-to-peer network? Peer-to-peer network (P2P for short), also known as peer-to-peer connection, is a new communication mode. Each participant has the same ability and can start a communication session.
Question 4: What do I need to install to form a peer-to-peer network? First of all, of course, you need to prepare the necessary hardware equipment. Take the most common star network as an example. In addition to computers, these devices also include: twisted pair with RJ45 connector (crystal connector), hub with RJ45 port and network card.
Secondly, what you need to do is to connect these hardware devices. The general sequence is to insert the network card into the corresponding slot of the computer motherboard, then plug in the hub and put it in a suitable position, and finally connect the network card and the hub with twisted pair.
Next, you need to install the driver of the network card on your computer. At present, the popular network cards mainly include NE2000 compatible series and 8 139 series. For example, when installing in Windows 98, the driver of the former is self-contained and does not need to be added, while the installation of the latter needs to prepare its driver in Windows 98 in advance.
The next thing to do is to configure the TCP/IP properties of the computer. This process generally includes three steps: binding the intranet IP address for the network card, setting the gateway, and setting the DNS server address.
Then, you need to add the "File and Printer Sharing on Microsoft network" service so that other computers can use your * * * shared resources.
Finally, you should make sure that every computer in the network has a different computer name and workgroup name with the same content.
When you have installed all the computers in the network according to the above steps, you have successfully established a peer-to-peer network.
Question 5: Introduction to Peer-to-Peer Network Peer-to-Peer computer network is a distributed application architecture 1, which distributes tasks and workloads among peers. It is a networking or network form formed by peer-to-peer computing mode at the application layer. "Peer" means "peer, partner, peer" in English. So literally, P2P can be understood as peer-to-peer computing or peer-to-peer network. Some domestic media translate P2P into "peer-to-peer" or "peer-to-peer", which is called peer-to-peer networking or peer-to-peer computing in academic circles. It can be defined as: network participants * * * enjoy some of their hardware resources (processing power, storage capacity, network connection capacity, printers, etc.). Participants in this network are both servers and clients of resources, services and content. In the P2P network environment, many interconnected computers are in a peer-to-peer position, each computer has the same function, and there is no division between owner and subordinate. A computer can be used as a server to set up resources for other computers in the network, or as a workstation. Generally speaking, the whole network does not depend on a dedicated central server or a dedicated workstation. Each computer in the network can not only serve as a requester of network services, but also provide resources, services and content in response to requests from other computers. Usually these resources and services include: information sharing and exchange, computing resources (such as CPU computing power), storage (such as cache and disk space use), networks, printers and so on.
Question 6: What is the peer-to-peer working mode of the network and what is the client-server working mode? Please give examples of (1) peer-to-peer network respectively.
In the peer-to-peer network, so the computer status platform, there is no affiliation, and there is no dedicated server and client. The resources in the network are scattered on each computer, and each computer may become a server or a client. The security verification of the network is carried out locally. Generally, the number of users in a peer-to-peer network is less than or equal to 10, as shown in figure 1- 10. Peer-to-peer network can provide flexible * * * sharing mode, and networking is simple and convenient, but it is difficult to manage and has poor security performance. It can meet the needs of general data transmission, so some small units can choose the "peer-to-peer network" structure when the number of computers is small.
(2) Client/Server mode (Client/Server)
In order to make network communication more convenient, stable and safe, we introduce a server-based network (C/S for short), as shown in figure1-1. In this type of network, one or several large computers centrally manage and access the database, which is called a server, while other application processing work is distributed to other computers in the network, forming a publishing processing system. The server's ability to control and manage data has been upgraded from file management mode to database management mode. Therefore, the server in C/S is also called database server, which is mainly responsible for data definition and access security backup and recovery, concurrency control and transaction management, and performs database management functions such as selective retrieval and index sorting. It has enough ability to transmit the data that users need after processing through it, rather than the whole file, to the client through the network, thus reducing the transmission load of the network. C/S structure is the product of the combination of the development and universal application of database technology and the development of LAN technology.
(3) Dedicated server
In private server network, its characteristics are similar to those based on server mode, but the division of labor of servers is more clear. For example, in a large network, the server may provide users with different services and functions, such as file printing service, WEB, mail, DNS and so on. Then, using a server may not be able to bear such a great pressure, so in this network, there need to be multiple servers to provide services for its users, and each server provides dedicated network services.
(4)B/S (browser/server mode)
Mode is also called B/S structure. It is an extension of the application of C/S mode with the rise of Internet technology. Under this structure, the user interface is realized through IE browser. The biggest advantage of B/S mode is its relatively simple operation and maintenance, which enables different people to access and operate the same data from different places in different access modes (such as LAN, WAN, Internet/Intranet, etc.). ). The biggest disadvantage is that it relies too much on the external network environment of the enterprise, and the interruption of the external network of the enterprise for various reasons will cause system paralysis. /s is brower/server, which means using a browser (such as ie) to operate the server for the application client. This is easy to use in the browser, but there is no good input validation. There are not many logical implementations. Local is only used to get data, and then most of the verification needs to be submitted to the server to complete.
Question 7: What is a computer peer-to-peer network? Peer-to-peer network, also known as peer-to-peer connection, means that two hosts pass by without distinguishing who is the service requester and who is the service provider. As long as both hosts are running peer-to-peer connection software (P2P software), they can communicate in peer-to-peer connection.
Question 8: How to judge whether it is peer-to-peer broadband or non-peer broadband? What are the advantages and disadvantages of each? Usually dial-up broadband and optical fiber,
Not equal.
Non-fixed IP is usually used to access the public network.
Of course, there are a few exceptions.
Prices range from a few hundred to tens of thousands a year.
Equivalent to,
SDH private line or circuit used by the company,
Or other related products,
There are usually fixed IP pairs to access the company network.
Prices range from thousands to tens of thousands a month.
Even hundreds of thousands to millions, don't wait.
Point-to-point dedicated lines are usually used between large companies and multinational companies.
And set up a large local area network for use.
Either to keep it a secret,
Or it was built to get big data.
What is unequal is that the requirements are not high.
Cheap.
Remember to adopt before you go, thank you!
Question 9: What is a peer-to-peer network? Peer-to-peer network adopts decentralized management. Each computer in the network can be used as both a client and a server, and each user manages the resources on his own machine.
Question 10: What is a peer-to-peer assistance network? How to operate? If users who play the same content enjoy their own bandwidth, this is called peer-to-peer assisted network setup, because peers on the network can help each other and provide a better experience.
If users use peer-to-peer assistance for network settings, websites that provide audio and video for your computer can provide higher quality content. * * * Enjoy the bandwidth to make the audio or video play more smoothly, without skipping or pausing during buffering. Flash Player uses the peer-to-peer assistance network to set the * * * bandwidth only with your consent.
Matters needing attention
Enabling this option does not mean that the application is allowed to * * * enjoy your bandwidth at any time when needed, but only allows the application to ask if you need to * * * enjoy the bandwidth. In most cases, you only want * * * to enjoy the bandwidth when using a high-speed Internet connection.
Please note that * * * Enjoying bandwidth will increase the amount of data provided by the network provider for your device. If you use a monthly subscription system without restricting network traffic, using peer-to-peer assistance network setup will not increase your cost.
However, if you charge by traffic or are not sure how to pay the network usage fee, you may need to disable the peer-to-peer assistance network settings. If you disable this feature, you will not be asked if you want to enjoy the bandwidth.
To specify whether to use peer-to-peer assistance network settings, use the Peer-to-Peer Assistance Network Settings panel.