How many years "heads" have you been a strong sense of network management? Before you become a qualified network management, you must first make the following ten questions ...
Today, with the wide application of the computer and the popularity of the network, more and more units and departments began to introduce computer network management, thereby requiring more excellent network management. How many years "heads" have you been a strong sense of network management? Before you become a qualified network management, you must first make the following ten questions. If you don't even have these most basic network management knowledge, how can you not make this lesson?
What is the computer network?
This is the first question that must be solved, absolutely the core concept. We speak computer networks, in fact, using communication equipment and lines differently, and functionally independent multiple computer systems, with comprehensive network software (Ie, network communication protocol, information exchange, network operating system, etc.) Implement system in network resource sharing and information transmission. Its function is the main performance in two aspects: First, achieve resource sharing (including hardware resources and software resources); the other is to exchange information between users. The role of the computer network is: not only makes all resources on the network, but also provides users with strong communication methods and services as much as possible for users. From the perspective of the network management, it is said that it is to use technical means to implement information transfer between networks, while providing users.
Which part of the computer network consists of?
Computer networks are typically composed of three parts, which are resource subnets, communication subnets, and communication protocols. The so-called communication subnet is part of the data communication in the computer network; the resource subnet is part of the user in the computer network, responsible The network is applied to the application; and the rules and conventions of communication must be co-comply with the communication protocol, and its existence is the fundamental difference between the computer network and the general computer interconnect system. So in this point, we should understand why computer networks are the product of computer technology and communication technology.
How to divide the type of computer network?
The most common method of dividing now is: According to the size of the geographic range coverage of computer networks, it is generally divided into WAN (WAN) and LAN (LAN) (also adding an annular network (Man)). As the name suggests, the so-called wide area network is nothing more than geographical network connection forms, such as the famous Internet network, and the chinanet network is a typical WAN. And a local area range is usually no more than 10 kilometers and is often limited to a single building or a group of buildings. Novell.com is currently the most popular computer LAN.
What is the architecture of a computer network?
In computer network technology, the network architecture refers to the overall design of the communication system. Its purpose is to provide standards for network hardware, software, protocol, access control, and topology. It is now widely used to open system interconnect OSI ( The reference model of Open System Interconnection is the structure of the network with the physical layer, the data link layer, the network layer, the transfer layer, the conversation layer, the representation layer, and the application layer. You should pay attention to the network architecture The advantages and disadvantages will directly affect the performance of the bus, interfaces, and networks. The key elements of the network architecture are just agreements and topologies. At present, the most common network architecture has FDDI, Ethernet, token ring network, and fast Ethernet.
What is the protocol of a computer network?
One of the key elements of the network architecture just said is a network protocol. The so-called protocol is a formal description of rules that must be observed when exchange data between data formats and computers. Its role and Mandarin have the same case. Ethernet, NetBeui, IPX / SPX, and TCP / IP protocols are usually used in accordance with different networks. Ethernet is the most common network low-level protocol in the bus type agreement. It is easy to install and cost is cheap; NetBeui can be said to be a network protocol designed for small LAN. To install the NetBeui protocol, you must install the NetBeui protocol, but if you need a route to another LAN, you must install the IPX / SPX or TCP / IP protocol. The former is almost nominal novel Novell The latter is adopted by the famous Internet network. In particular, TCP / IP (Transfer Control Protocol / Network Agreement) is one of the earliest protocols in the Open System Interconnect Agreement, and is also the most complete and most widely used protocol. Connection, communication, and communication between various computer platforms can be implemented. What is the topological structure of a computer network?
The topology of the computer network refers to the form of various sites in the network. It is clear that the connection form of file servers, workstations, and cables is in the local area network. The most important topology topology, star topology, ring Topology and their mixed types. As the name suggests, the bus type is actually putting the file server and workstation on a public cable called the bus, and the bus must have a terminal; the star topology is based on a device as a central connection point, each workstation is It is directly connected to a star; and the ring topology is serialized in serializing all the sites, which constitutes a ring loop like a chain; mixing these three most basic topologies, it is naturally a mixed type.
Which hardware involves computer network construction?
The hardware system of computer networks is usually composed of five parts: file server, workstation (including terminal), transmission media, network connection hardware, and external devices. The file server generally requires a microcomputer equipped with a high-performance CPU system that acts as the core of the network. In addition to managing transactions on the entire network, it must also provide a variety of resources and services. The workstation can be said to be an intelligent terminal. After the program and data are removed from the file server, it can be processed on this site, usually there is a disk and diskless. Next, talk about the transmission medium, which is a physical path between the sender and the recipient in the communication network. In the LAN, it is used to connect the cable and workstation. Currently used network transmission media has twisted pair (mostly LAN), coaxial cable and cable, etc .. Common network connection hardware has network interface card (NIC), hubs (HUB), repeater, and modem (modem). The printer, scanner, plotter, and other devices that can be shared for workstations can be referred to as external devices.
Which operating systems are usually installed by computer networks?
We all know that the network operating system is the soul of the entire network, and it is also an important embodiment of a distributed processing system. It determines the functionality of the network and determines the application area of different networks. The currently popular network operating system mainly has UNIX, NetWare, Windows NT and emerging Linux.unix history has a long history, and it is already quite mature today, especially in safe and reliable and applications; compared to file services And print management, and its directory service can be said to be aware of directory management by the industry; Windows NT is a real 32-bit operating system that can support a variety of hardware platforms, which maintains a popular Windows user interface, currently positive More and more networks are applied; and the latest Linux is ranked among excellent network operating systems with its advanced design ideas and free software.
What is the future development trend of computer network?
The development of future networks has three basic technical trends. First, the distributed computing and intelligent direction of low cost microcomputers, the Client / Server (client / server) structure; the second is to adapt to multimedia communication, mobile The development of communication structure; third, the network structure adapts to network interconnection and expands the scale to establish a global network. What are the specific services of the computer network management?
Summary of the business content of the network management: network construction, network maintenance and network services. To form a local area network (including planning topology, physical hardware implementation and network protocol settings), new or upgrade network devices and planning network development is the specific content of network construction; and general network maintenance includes network fault detection and maintenance (including hardware and Software), network security protection and management; as for network services, you can distinguish between a variety of network objects, but the most common login, file transfer, email, and resource sharing, of course Only one to several aspects. In addition, the production and update of the homepage in the website can also be included in the business scope of the network management. In short, the so-called "network management" as the name is to build and manage the network. Their work and tasks are like the employees of the hotel, and they will pay attention to friends from all over-sides through business.
Excellent network management does not say this work hard, but if you will take time, you can do it, you can do it as well as Huajun and Gao Chunhui. However, before you become an excellent network management, you must make it clear about this ten questions today!
