What is a local computer network presentation. Local network presentation. Fragments from the presentation
LOCAL
COMPUTER
NETWORKS
Local networks (from English local - local) are networks consisting of closely spaced computers, most often located in the same room, in the same building or in closely spaced buildings.
The most important characteristic local area networks is:
- speed data transmission, therefore
- data transfer rate, therefore PCs are connected using high-speed adapters
(baud rate = 10 Mbps)
- high-speed digital lines connections
- local networks must be adaptable and flexible
With direct PC connection
there are 2 types of interaction:
REMOTE CONTROL
DIRECT ACCESS
Direct access:
All actions on the command Direct connection are carried out By the master direct connection using successive dialog boxes Direct connection.
Preparatory operations:
installation of software components Client, Protocol, Service;
installation of the service of access to files and printers of the Microsoft network;
providing access at the resource level;
The windows indicate which of the computers is the slave and which is the master; port used for communication; the login password to use.
definition of how shared resources of the PC server involved in the exchange;
connection from a client computer to shared information resources.
Remote control:
Basic synchronization system incl. into myself:
1) unification of stationary and laptop computers. The stationary computer must be the master, and the folders containing the necessary files must be shared;
2) copying files from a stationary computer to a portable one in the Briefcase folder;
3) disconnecting a laptop from a stationary one and further editing files in the Portfolio folder;
4) Reconnecting the laptop so that stationary computer from which the source files were originally copied to the Portfolio folder;
5) opening the Portfolio folder and executing the Portfolio / Refresh command.
For files modified on a stationary PC, a warning will be displayed, after which you must select any of the following actions:
update on laptop;
update on a stationary PC;
canceling any update.
TYPOLOGY NETWORKS
"TIRE"
"STAR"
« RING »
"SNOWFLAKE"
Soy d inertia type " star ".
Advantages:
with a star connection, it is easy to troubleshoot the network.
Disadvantages:
the connection is not always reliable, as the failure of the central site can lead to network downtime.
Soy d inertia " common bus ".
Advantages:
in a "shared bus" topology, the failure of individual computers does not bring the entire network to a standstill.
Disadvantages:
it is somewhat more difficult to find a fault in the cable, and if the cable breaks (common for the entire network), the operation of the entire network is disrupted.
Soy d inertia type " ring ".
Advantages:
load balancing, possibility and convenience of cable laying.
Disadvantages:
physical limitations on the total length of the network.
Soy d inertia " Snowflake ".
If the enterprise occupies a multi-storey building, then the scheme can be applied in it " Snowflake " , in which there are file servers for different workgroups and one central server for the entire enterprise.
Local computer networks
Completed by: T.O. Khrushcheva student of grade 10 "A"
Checked by: G.V. Pospelova
MBOU "Secondary School No. 20"
Novomoskovsk, Tula region
- The local network
- Network adapter
- OS
- LAN functions
Local network Diagram of local network devices
The local network
Peer-to-peer the local network with line bus topology
In home local networks, which included 2-3 computers, the topology is used to connect computers linear bus.
In this case, all computers are connected to one cable, and the printer is connected to one of the computers.
Star peer-to-peer LAN
V peer-to-peer LANs with star topology all computers and network printer connect to a hub or switch, which provide data transfer between network devices
Server-based local area network
To increase productivity, as well as to ensure greater reliability of information storage in the network, powerful computer for storing files and application programs.
Such a computer is called server, a the local network- a server-based network.
Network adapter
Network adapter - a special board (connection of computers in wired local area networks)
The main function of the network adapter is to transmit and receive information from the network
OS
Operating systems have built-in networking capabilities that make connecting a computer to a local network quick and easy
Modern versions operating systems
LAN functions
The local network unites computers installed in the same room or in the same building. For example school computer labs
School
Office 22
Office 16
Office 12
- Ugrinovich N.D. Informatics and ICT. A basic level of: textbook for grade 10 / N.D. Ugrinovich. -9th ed. - M. : Binom. Knowledge laboratory, 2012.-213s-: ill.
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Presentation on the topic "Local computer networks" in informatics in powerpoint format. This presentation for schoolchildren in grades 10-11 tells about the hardware and software of local computer networks. The author of the presentation: Makarova Aiyyny Aleksandrovna, a student of the 10th grade.
Fragments from the presentation
The local network unites several computers and allows users to share the resources of computers, as well as peripheral devices connected to the network (printers, disks, modems, etc.).
- Peer-to-peer local area network with line bus topology
- Star peer-to-peer LAN
- Server-based local area network
- LAN segments connected by a router
Hardware and software for wired and wireless networks
- In wired local area networks, computers are connected to each other using a cable. Cables connect to network adapters Ethernet type that can provide data transfer rates over a local network of 10 Mbps, 100 Mbps or 1000 Mbps.
- To connect to a local network of portable computers, it is often used wireless connection, in which data transmission is carried out using electromagnetic waves. Wireless LANs use an access point as the central network device. Wireless networks types of Wi-Fi can provide data transfer rates up to 54 Mbps, but the speed depends on the number of connected computers and the distance to the access point.
Presentation - Transfer of information - Local and global computer networks
For efficient operation of several computers, they need to exchange information
Computers can exchange information using channels of various natures:
cable
radio channels
from fiber
Download and read Presentation - Information transfer - Local and global computer networks
Presentation - Computer networks - Communication technology
Networks provide users with the opportunity not only to quickly exchange information, but also to collaborate on printers and other peripherals, and even the simultaneous processing of documents.
Download and read Presentation - Computer networks - Communication technologies
Presentation - Internal devices of the PC - Getting to know your computer
Motherboard Is the largest PC board. It contains the highways connecting the processor with RAM, - the so-called tires. To tires motherboard all other internal devices of the computer are also connected. The motherboard is controlled by a microprocessor chipset - the so-called chipset.
Microprocessor- the main microcircuit of the PC. All calculations are performed in it. The main characteristic of a processor is its clock speed. The higher the clock speed, the higher Download and read Presentation - Internal devices of the PC - Getting to know the computer
Presentation - Computer networks - The local network
Download and read Presentation - Computer networks - Local network