A computer network is a connection of computers to exchange information and share resources (printer, modem, disk memory, etc.).
- A computer network is a connection of computers to exchange information and share resources (printer, modem, disk memory, etc.).
- A local network unites computers installed in one room (classroom, office, etc.), in one building or in several closely located buildings.
- Typically, local network computers are located at a distance of no more than one kilometer. When increasing the distance, special equipment is used.
- Local networks, according to the way computers interact, are subdivided into:
- peer-to-peer;
- networks with a dedicated server.
- In a peer-to-peer local area network, all computers are equal. Shared devices can be connected to any computer on the network.
- Dedicated server network structure
- Server (from English server - service device) - a computer that distributes resources between network users.
- The server has a powerful processor, large RAM and disk memory, the main part is stored software and network data that can be used by all users of the network.
- Less efficient computers with less disk and RAM are usually used as workstations.
- In networks with a dedicated server, it is implemented client-server technology.
- Server software is installed on the server:
- server room operating system;
- WEB-server (Intranet organization);
- proxy server (ensuring work from the Internet workstations);
- file server (file sharing), etc.
- At the workstation
- client software is installed:
- operating system for workstations;
- client part of application software, etc.
- Dedicated Server Networking Software
- The most common methods for connecting computers are:
- bus (usually used for peer-to-peer networks);
- star (used for any local area networks).
- Network hardware
- The cable runs from one computer to another, connecting computers and peripherals
- Each computer has a separate cable from one central site.
- LAN components
- To organize a local network, it is necessary to install a network card in each PC and connect all computers using a special cable.
- LAN components
- Sometimes the components necessary for connecting computers are already installed on the motherboard and then a separate network card is not needed.
- In this case, the socket for network cable located on the back of the system unit.
- LAN components
- Coaxial cable - transfer rate up to 10 Mbps.
- Twisted pair - transfer rates up to 100 Mbps.
- LAN components
- Connectors for cables
- for coaxial cable
- for twisted pair
- LAN components
- Hubs (HUB or Switch) - are used to connect computers on a network.
- A hub can have a different number of connection ports (usually from 8 to 32).
- LAN components
- The overall network connection speed when using the HUB is determined by the speed of the slowest network card.
- For Switch, the connection speed of any pair of computers is determined by the speed of the slowest network card in the pair (group).
- Network software
- To work in a local network, you need special network software.
- In Windows operating system
- you already have everything you need to set up the network.
- Network software
- To organize a local network, you must:
- determine the name of the Working Group;
- assign each computer a unique name and IP address in this workgroup, and set the subnet mask address (in some cases, you may not need to set an explicit IP address and subnet mask address).
- Network software
- This window
- used to install
- computer name
- and the Working Group
- Network software
- These windows are used to install
- explicit IP address and subnet mask parameters
- This window
- used to install
- access level
- to local computer resources
- Local resource. Access to computer resources for network users is prohibited. To ensure the availability of local resources, you must set the switch to the Share position.
- Shared resource. Allows the use of computer resources (disk memory and peripheral devices - printer, modem) network users. To do this, you need to allow Opening general access to the folder. In this case, it is required to determine the access level.
- Modes of access to network resources
- Modes of access to network resources
- Only reading
- Allows network users to open or copy files and folders.
- Full access
- Allows network users to perform all operations on files, folders (move, delete, edit, rename, etc.).
- Password-Defined Access
- This mode provides different categories of users with different access rights, for example, read-only or full access.
The presentation on the topic "Local computer network" is intended for use in the study of computer disciplines by 1st and 2nd year students. The presentation includes the concept of a local computer network, classification, description of the hardware and software of the local computer network, modes of access to the network.
Download:
Preview:
To use the preview of presentations, create yourself an account ( account) Google and log into it: https://accounts.google.com
Slide captions:
Local area network
A computer network is a connection of computers to exchange information and share resources (printer, modem, disk memory, etc.).
A local network unites computers installed in one room (classroom, office, etc.), in one building or in several closely located buildings. Typically, local network computers are located at a distance of no more than one kilometer. When increasing the distance, special equipment is used.
Local networks by the way computers interact are subdivided into: peer-to-peer; networks with a dedicated server. The local network
Peer-to-Peer Local Area Network In a peer-to-peer local area network, all computers are equal. Shared devices can be connected to any computer on the network.
Dedicated Server Network Dedicated Server Network Structure
Server (from English server - service device) - a computer that distributes resources between network users. The server has a powerful processor, large RAM and disk memory, and stores the bulk of the software and network data that can be used by all network users.
Less efficient computers with less disk and RAM are usually used as workstations.
In networks with a dedicated server, the client-server technology is implemented. Server software is installed on the server: server operating system; WEB server (Intranet organization); proxy server (ensuring work from the Internet workstations); file server (file sharing), etc. Dedicated Server Networking Software
The client software is installed on the workstation: operating system for workstations; client part of application software, etc. Dedicated Server Networking Software
The most common methods of connecting computers are: bus (usually used for peer-to-peer networks); star (used for any local area networks). Network hardware
Components of a local area network To organize a local area network, it is necessary to install a network card in each PC and connect all computers using a special cable.
Sometimes the components necessary for connecting computers are already installed on the motherboard and then a separate network card is not needed. In this case, the socket for the network cable is located on the back of the system unit.
LAN Components Coaxial cable - transfer rate up to 10 Mbps. Twisted pair - transfer rates up to 100 Mbps.
Local network components Hubs (HUB or Switch) are used to connect computers in a network. A hub can have a different number of connection ports (usually from 8 to 32).
LAN Components The overall network connection speed when using the HUB is determined by the speed of the slowest network card. For Switch, the connection speed of any pair of computers is determined by the speed of the slowest network card in the pair (group).
Network software To organize a local network it is necessary to: define the name of the Working group; assign each computer a unique name and IP address in this workgroup, and set the subnet mask address (in some cases, the explicit IP address and subnet mask address may not be set).
Network software This window is used to set the computer name and Workgroup
Network software These screens are used to set an explicit IP addresses and subnet mask parameters
This window is used to set the level of access to local computer resources Modes of access to network resources
Local resource. Access to computer resources for network users is prohibited. To ensure the availability of local resources, you must set the switch to the Share position. Shared resource. Allows the use of computer resources (disk memory and peripheral devices - printer, modem) network users. To do this, you need to enable Share the folder. In this case, it is required to determine the access level. Modes of access to network resources
Network Access Modes Read Only Allows network users to open or copy files and folders. Full access Allows network users to perform all operations on files, folders (move, delete, edit, rename, etc.). Password-Defined Access This mode grants different user categories different access rights, such as read-only or full access.
On the subject: methodological developments, presentations and notes
Abstract for the lesson "Local network" A computer network is a connection of computers for exchanging information and sharing resources (printer, modem, disk memory, etc.) slide 2. Local with ...
Presentations on the discipline "Computer networks"
Presentations help the teacher to conduct the lesson, help the student to more easily assimilate the material of the topic ...
CONTROL AND EVALUATION EQUIPMENT by profession 230103.03 Adjuster of computer networks MDK.01.01. Device and maintenance of local computer networks
CONTROL AND EVALUATION EQUIPMENT by profession 230103.03 Adjuster of computer networks MDK.01.01. Arrangement and maintenance of local computer networks ...
Let's repeat
What is an operating system?
Operating system (OS)- a set of programs that allows the user to communicate with a computer, control computer devices, programs and information stored in the computer's memory.
Let's repeat
What are the main functions of the OS?
- Providing a dialogue between the user and the computer.
- Management of programs installed on a computer.
- Controlling the operation of computer devices.
Let's repeat
What is a file system?
File system is intended for organizing operations on files and folders (directories).
Let's repeat
What operations does the file system allow?
- create, rename and delete files;
- transfer and copy files from one medium to another;
- search for files stored on different media;
- run programs for execution.
Let's repeat
What programs are called file managers?
File manager - computer program providing a user interface for working with file system and files
Today in the lesson we ...
- learn what is called a computer network;
- consider the types of computer networks and their features.
- get acquainted with various types of network resources;
The desire to transfer information from one computer to another, to provide users with joint access to technical devices, software and information resources of computers has caused the need to unite computers into a single network.
Computer network
On a territorial basis, networks can be divided into four types:
- local;
- regional;
- corporate;
- global.
local area network .
This is, as a rule, a network of one organization, educational institution, etc.
By the way of organization, local computer networks are divided into:
networks with a dedicated server.
peer-to-peer networks
In peer-to-peer networks, all computers are equal.
A dedicated server network has one high-performance computer that manages the entire network. This computer is called server .
It provides its resources for sharing with the rest of the computers on the network, called clients, and can manage their work.
By the method of connection, computer networks can be:
wired
wireless
To organize the work of computers connected to a local network, you need the appropriate hardware and software:
Hardware
Network Card
Network cable
Network port
All computers on the network must be equipped with network cards. They are designed to receive and transmit information on the network.
Network Card
Computers on a network are connected using a special network cable.
Network cable
The socket for connecting a network cable is located on the back of the system unit.
Network port
"Tire"
Ways of connecting computers in a local network:
"Star"
Ways of connecting computers in a local network:
Wireless LANs use an access point, and each computer must have a dedicated wireless network card like Wi-Fi .
The operating system provides software support for the operation of computers in the local network.
Computers are brought together on networks to share network resources.
Network resources (network resources) computers can be:
- technical devices (printers, modems, disk drives, etc.);
- software (system, applied and instrumental);
- information resources (files with information).
The user on whose computer the resource is located (file, disk, folder, or device) owns it and has full access to that resource.
The resource owner can allow other network users to access their disk, folder, file.
Available network resources are viewed in the folder Network .
The window of this folder displays the shared resources of the network to which the computer is connected (computers, folders, files, printers).
The most important characteristic of a local network is information transfer rate it contains the amount of information transmitted per unit of time.
The transfer rate of information over a network is usually measured in bit / s .
There are no uniform rules of behavior for users on a local network. Let's just mention some general requirements:
- do not share your username and password to log in to the network to other users;
- whenever possible, save information on your computer disk, and not on public disks.
Let's repeat
Why are computers connected in a network?
Computer network- the association of computers, ensuring the sharing of network resources.
Let's repeat
What network is called local?
Computers located at short distances from each other can be combined into local area network .
Let's repeat
With the help of what computers are united into a local network?
To organize the work of computers connected to a local network, you need the appropriate hardware and software: a network card, a network cable.
Let's repeat
What are the local networks by the method of connection?
Peer-to-peer and dedicated server networks.
Homework
Often, when creating educational presentations, teachers are forced to spend a lot of time looking for a suitable presentation design: they select frames, backgrounds, colors, etc. This competition aims to bring together ready-made solutions for educational presentations so that anyone can use the templates in their work.
What place does dictation take among them? How to dictate, and to whom and when? And most importantly - why? Our article is devoted to the types and variants of dictations.
The answer at the blackboard is a situation familiar to every student. Only children behave differently in this situation. For some, it is easy and even pleasant to go public. They like the attention of others to their own person. They perfectly answer the teacher's questions, even without knowledge of the subject. Others experience discomfort and slight anxiety, which can be easily dealt with without assistance. And some, hearing their name, feel confusion and horror. They get lost, get confused in words and, in the end, completely forget the material they have learned. What if the child refuses to answer at the blackboard?
Computer network - a system of interconnected computers designed for the transmission, storage and processing of information.
The connection of computers located at a short distance from each other is called local area network ... Users can share computer resources and can also share peripherals.
- A local network in which all users are equal is called peer-to-peer .
- If there are 10 or more computers on the network, then in order to increase performance, some computers are specially allocated for storing a certain part of information. Such computers are called servers , and the local network - server-based network . The rest of the computers are called workstations or clients of the network .
??? What is the local network
in office number 41?
network topology .
- The simplest way of connecting computers, when a cable connects all computers and peripheral devices in series, is called linear bus .
The connection diagram of computers in a local network is called network topology .
- If a separate cable from one central site (hub) is suitable for each computer, this connection option is called star .
The connection diagram of computers in a local network is called network topology .
- When a very large number of computers (more than 100) are connected to the network, servers are connected in ring using a fiber optic cable. The ring cable is connected to a high performance hub. Switches of other network segments are also connected to it.
??? What is the topology in the office № 41?
subscriber's name
delimiter
server name
Computer network services
Teleconference - exchange of information on a specific topic between users. Teleconference allows you to distribute your message simultaneously to a large number of network users. Each conference is dedicated to a specific topic.
Example conference address: fido7.multimedia
Working with files on file archive servers (viewing directories and files, copying, deleting and updating files). Used as a rule for program exchange (supported by ftp and http).
Computer network services
IRC (Internet Relay Chat) - interactive communication in real time: exchange of messages typed from the keyboard between several users, exchange of audio messages, exchange of video images.
ICQ ( Internet pager) - two-way exchange of text information in real time.
Internet telephony - the ability to create voice mail, as well as exchange video images, text messages, files.
Internet radio - a service that allows you to listen to radio stations broadcasting on the network.
Internet TV - a service that allows you to receive television channels.
Online Stores - a service that allows you to make purchases without leaving your home. Payment is made either in cash or through virtual banks.
Local and global computer networks MBOU secondary school No. 6 Reutov Kuryanova Olga Alekseevna
Thumbnail "src =" http://uslide.ru/images/19/25470/389/img2.jpg "alt =" (! LANG: MOU school № 6 Reutov Kuryanova Olga Alekseevna
MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
Thumbnail" src="http://uslide.ru/images/19/25470/389/img4.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
Secondary school # 6 Reutov Kuryanova Olga Alekseevna Author: Purpose of LAN File exchange between network users Efficient use of public resources: more disk space, printer, scanner, software, etc. MOU Secondary School No. 6, Reutov
Thumbnail" src="http://uslide.ru/images/19/25470/389/img6.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna Author: Types of local networks Peer-to-peer All computers are equal. In total, no more than 10 computers Server-based network One computer is specially allocated for storing files and software applications MOU Secondary School No. 6, Reutov
Thumbnail" src="http://uslide.ru/images/19/25470/389/img8.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
MOU secondary school № 6 Reutov Kuryanova Olga Alekseevna Author: The general scheme of connecting computers in a local network is called network topology All networks are built on the basis of 3 basic topologies: bus ring star In addition to basic topologies, there are topologies: tree-like mesh fully connected MOU secondary school № 6 g . Reutov
Thumbnail" src="http://uslide.ru/images/19/25470/389/img10.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
Secondary school № 6 Reutov Kuryanova Olga Alekseevna Author: Ring Signals are transmitted along the ring in one direction and pass through each computer. Advantages: Disadvantages: The cable does not have a free end and therefore does not need a terminator. Each computer amplifies the signals by transmitting them to the next computer. If one computer fails, the entire network of the secondary school No. 6 in Reutov stops functioning
Thumbnail" src="http://uslide.ru/images/19/25470/389/img12.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
MOU Secondary School No. 6, Reutov Kuryanova Olga Alekseevna Author: Association of computer networks Regional networks - unite computers within one region (city, country, continent). Corporate networks - unite computers of one organization in different countries and cities, protecting them from unauthorized access (for example, MicroSoft Network). Global computer network - unites many local, regional and corporate networks and includes hundreds of millions of computers (INTERNET). The Internet (translated from English - between networks) is a giant worldwide computer network. Its purpose is to provide anyone who wishes with constant access to any information. MOU Secondary School No. 6, Reutov
Thumbnail" src="http://uslide.ru/images/19/25470/389/img14.jpg" alt="MOU secondary school № 6 Reutov Kuryanova Olga Alekseevna Author: IPv6- new version of the pro ..." title="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna thumbnail" src="http://uslide.ru/images/19/25470/389/img17.jpg" alt="MOU Secondary School No. 6 Reutov Kuryanova Olga Alekseevna
Secondary school # 6 Reutov Kuryanova Olga Alekseevna Author: Permanent connection Asynchronous access via telephone line (ADSL) - high speed of information transfer (512 kbit / s), but also high cost of equipment and operating time. In Russia, this method is still only developing. Synchronous access through a dedicated channel - a communication channel is allocated, designed for a certain speed of operation (from 64 kbps to several Mbps). It is too expensive for a private user in Russia. Connecting through a local network at home or in the area does not require high costs, but there are restrictions on the amount of downloaded information. For exceeding this volume (traffic) - additional payment. MOU Secondary School No. 6, Reutov
Related presentation"Локальная компьютерная сеть" предназначена для использования при изучении компьютерных дисциплин студентами 1 и 2 курсов. Презентация включает в себя понятие локальной компьютерной сети, классификацию, описание аппаратного и программного обеспечения локальной компьютерной сети, режимов доступа к сети.!}
Download:
Preview:
To use the preview of presentations, create yourself a Google account (account) and log into it: https://accounts.google.com
Slide captions:
Local area network
A computer network is a connection of computers to exchange information and share resources (printer, modem, disk memory, etc.).
A local network unites computers installed in one room (classroom, office, etc.), in one building or in several closely located buildings. Typically, local network computers are located at a distance of no more than one kilometer. When increasing the distance, special equipment is used.
Local networks by the way computers interact are subdivided into: peer-to-peer; networks with a dedicated server. The local network
Peer-to-Peer Local Area Network In a peer-to-peer local area network, all computers are equal. Shared devices can be connected to any computer on the network.
Dedicated Server Network Dedicated Server Network Structure
Server (from English server - service device) - a computer that distributes resources between network users. The server has a powerful processor, large RAM and disk memory, and stores the bulk of the software and network data that can be used by all network users.
Less efficient computers with less disk and RAM are usually used as workstations.
In networks with a dedicated server, the client-server technology is implemented. Server software is installed on the server: server operating system; WEB server (Intranet organization); proxy server (ensuring work from the Internet workstations); file server (file sharing), etc. Dedicated Server Networking Software
The client software is installed on the workstation: operating system for workstations; client part of application software, etc. Dedicated Server Networking Software
The most common methods of connecting computers are: bus (usually used for peer-to-peer networks); star (used for any local area networks). Network hardware
Components of a local area network To organize a local area network, it is necessary to install a network card in each PC and connect all computers using a special cable.
Sometimes the components necessary for connecting computers are already installed on the motherboard and then a separate network card is not needed. In this case, the socket for the network cable is located on the back of the system unit.
LAN Components Coaxial cable - transfer rate up to 10 Mbps. Twisted pair - transfer rates up to 100 Mbps.
Local network components Hubs (HUB or Switch) are used to connect computers in a network. A hub can have a different number of connection ports (usually from 8 to 32).
LAN Components The overall network connection speed when using the HUB is determined by the speed of the slowest network card. For Switch, the connection speed of any pair of computers is determined by the speed of the slowest network card in the pair (group).
Network software To organize a local network it is necessary to: define the name of the Working group; assign each computer a unique name and IP address in this workgroup, and set the subnet mask address (in some cases, the explicit IP address and subnet mask address may not be set).
Network software This window is used to set the computer name and Workgroup
Network software These screens are used to set the explicit IP address and subnet mask parameters.
This window is used to set the level of access to local computer resources Modes of access to network resources
Local resource. Access to computer resources for network users is prohibited. To ensure accessibility, you need to set the switch to Shared. Shared resource. Allows the use of computer resources (disk memory and peripheral devices - printer, modem) network users. To do this, you need to enable Share the folder. In this case, it is required to determine the access level. Modes of access to network resources
Network Access Modes Read Only Allows network users to open or copy files and folders. Full access Allows network users to perform all operations on files, folders (move, delete, edit, rename, etc.). Password-Defined Access This mode grants different user categories different access rights, such as read-only or full access.
