A computer network contains several computers, united into one network on a territorial basis. They are located in the same room, in one or more adjacent buildings. Local networks are used to exchange information between participants and to simplify the use of shared resources - printers, modems, disk drives.
For the most part, these are local computer networks located in the same building, which are based on the client / server model. A connection includes two computers and a path between them. The client computer sends a request to the server for information or service. The server responds to the client's request.
In this case, the functionality of the client or server can be transferred from one computer to another. When creating a local computer network, you need to choose hardware and software.
Analysis of the existing network administrator certifications
A computer network at the present stage is included in every business structure. The enterprise computer network is one of its parts, the composition of which complements the overall architecture. Network architecture includes topology, access methods, standards. The topology is chosen in connection with the layout of the premises and the technical requirements of the customer. The most common and at the same time productive structure is the "star" topology, in which all computers, including the server, are connected to the central switch with a separate cable. This topology has its pros and cons:
On the one hand, localization of failures caused by a damaged network cable or technical problems on a particular computer is provided. That is, such failures only affect the local segments in which they are located.
On the other hand, the requirements for the central element (the network core) are increasing and this creates a single point of failure, the failure of which actually blocks the entire network.
Therefore, when creating a network, it is of great importance to correctly design all its nodes, taking into account the requirements for availability and fault tolerance.
Description of the computer network
An important characteristic of a network is the way a workstation accesses network resources and how computers exchange data.
The method by which all computers have equal access to the network is called CSMA / CD. Before the start of information transfer, the channel availability is determined at the workstation. After the transfer, the receipt is successful. In case of failure, a repeated transmission is carried out, if necessary several times, until the information reaches the addressee.
The enterprise computer network uses Ethernet, a network architecture developed by Xerox in the 1970s. Subsequently, the project was supported by Intel and DEC. In 1999, support for twisted pair transmission was introduced.
For the most part, these are local computer networks located in the same building, which are based on the client / server model. A connection includes two computers and a path between them. The client computer sends a request to the server for information or service. The server responds to the client's request.
In this case, the functionality of the client or server can be transferred from one computer to another. When creating a local computer network, you need to choose hardware and software.
Analysis of the existing network administrator certifications
A computer network at the present stage is included in every business structure. The enterprise computer network is one of its parts, the composition of which complements the overall architecture. Network architecture includes topology, access methods, standards. The topology is chosen in connection with the layout of the premises and the technical requirements of the customer. The most common and at the same time productive structure is the "star" topology, in which all computers, including the server, are connected to the central switch with a separate cable. This topology has its pros and cons:
On the one hand, localization of failures caused by a damaged network cable or technical problems on a particular computer is provided. That is, such failures only affect the local segments in which they are located.
On the other hand, the requirements for the central element (the network core) are increasing and this creates a single point of failure, the failure of which actually blocks the entire network.
Therefore, when creating a network, it is of great importance to correctly design all its nodes, taking into account the requirements for availability and fault tolerance.
Description of the computer network
An important characteristic of a network is the way a workstation accesses network resources and how computers exchange data.
The method by which all computers have equal access to the network is called CSMA / CD. Before the start of information transfer, the channel availability is determined at the workstation. After the transfer, the receipt is successful. In case of failure, a repeated transmission is carried out, if necessary several times, until the information reaches the addressee.
The enterprise computer network uses Ethernet, a network architecture developed by Xerox in the 1970s. Subsequently, the project was supported by Intel and DEC. In 1999, support for twisted pair transmission was introduced.
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