NETWORKS

NETWORKS

Sabarish M Sabarish M

Sabarish M

Java Full Stack Developer

发布日期: 2022年11月7日
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A?Computer network?is any group of interconnected computing devices capable of sending or receiving data. A?Computing device?isn't just a computer it's any device that can run a program, such as a tablet, phone, or smart sensor.

Building a network

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  • End devices:?This covers computers, smartphones, and other peripheral devices (e.g., printers, fax).
  • Servers: These are the machines dedicated to storage and applications, where all the computations, data processing, and storage happens.
  • Routers:?These devices forward packets of data between networks until they reach their destination.
  • Switchers: Switches are multi-port bridges. Bridges, in turn, are more intelligent hubs that send data to the destination port. Hubs are repeaters equipped with multiple ports, and repeaters are devices that clean and strengthen received network signals.

Communication protocols:

Communication protocols are sets of rules that all the information-transferring nodes follow. Typical protocols include? ?wireless LAN, IEEE802, Ethernet, and cellular.

  • Network access layer: Defines how the data gets physically transferred.
  • Internet layer: Packages the data into understandable packets so it can be sent and received.
  • Transport layer: Allows the network devices to maintain conversations.
  • Application layer: Establishes how high-level applications access the network for purposes of data transfer

Network Defense

This vital element covers everything needed to keep the network safe. Defenses include?firewalls,?content filters.

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Network Types

LAN - Local Area Network

WAN -Wide Area Network

MAN -Metropolitian Area Network

PAN - Personal Area Network

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