A computer network contains several computers united in one network on a territorial basis. They are in the same room, in one or more adjacent buildings. Local networks are used to exchange information between participants and simplify the use of shared resources - printers, modems, disk drives.
Most of these are local computer networks located in the same building, which are based on the client / server model. The connection includes two computers and the path between them. The client computer sends a request to the server for information or services. The server responds to a client request.
In this case, the functionality of the client or server can move from one computer to another. Creating a local computer network, you need to choose equipment and software.
Analysis of an existing network administrator job
The computer network at the present stage is included in each business structure. The computer network of the enterprise is one of its parts, the composition of which complements the general architecture. Network architecture includes topology, access methods, standards. The topology is selected 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 a 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 damage to the network cable or technical problems on one or another computer is provided. That is, such failures affect only the local segments in which they are located.
On the other hand, the requirements for the central element (network core) are increasing and this creates a single point of failure, failure of which actually blocks the entire network.
Therefore, when creating a network, competent design of all its nodes is of great importance, taking into account the requirements for availability and fault tolerance.
Description of the computer network
An important characteristic of a network is the access methods of a workstation to network resources and methods for exchanging data between computers.
The method by which all computers have equal access to the network is called CSMA / CD. Before the transfer of information to the workstation, the channel availability is determined. After the transfer, the success of receipt. In case of failure, a retransmission is made, if necessary several times, until the information reaches the addressee.
The enterprise computer network uses Ethernet, a network architecture developed by Xerox in the 70s of the 20th century. Subsequently, the project was supported by Intel and DEC. In 1999, support for twisted pair transmission appeared.
Most of these are local computer networks located in the same building, which are based on the client / server model. The connection includes two computers and the path between them. The client computer sends a request to the server for information or services. The server responds to a client request.
In this case, the functionality of the client or server can move from one computer to another. Creating a local computer network, you need to choose equipment and software.
Analysis of an existing network administrator job
The computer network at the present stage is included in each business structure. The computer network of the enterprise is one of its parts, the composition of which complements the general architecture. Network architecture includes topology, access methods, standards. The topology is selected 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 a 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 damage to the network cable or technical problems on one or another computer is provided. That is, such failures affect only the local segments in which they are located.
On the other hand, the requirements for the central element (network core) are increasing and this creates a single point of failure, failure of which actually blocks the entire network.
Therefore, when creating a network, competent design of all its nodes is of great importance, taking into account the requirements for availability and fault tolerance.
Description of the computer network
An important characteristic of a network is the access methods of a workstation to network resources and methods for exchanging data between computers.
The method by which all computers have equal access to the network is called CSMA / CD. Before the transfer of information to the workstation, the channel availability is determined. After the transfer, the success of receipt. In case of failure, a retransmission is made, if necessary several times, until the information reaches the addressee.
The enterprise computer network uses Ethernet, a network architecture developed by Xerox in the 70s of the 20th century. Subsequently, the project was supported by Intel and DEC. In 1999, support for twisted pair transmission appeared.
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