What is Ethernet?
Ethernet is a category of technologies that allows data-link and physical specs for controlling access to a shared network medium. It's came out as the superior technology utilized in LAN networking.
Ethernet was primitively built up by Xerox in the 1970s, and functioned at 2.94Mbps. The technology was standardised as Ethernet Ver. 1 by a consortium of 3 companies - DEC, Intel, and Xerox, conjointly looked up as DIX - and further rectify as Ethernet 2 in 1982.
In the midst 1980s, the Institute of Electrical and Electronic Engineers (IEEE) released a regular standard for Ethernet, defined as IEEE 802.3 standard. The first 802.3 Ethernet operated at 10Mbps, and with success supplanted competitive LAN technologies, such as Token Ring.
Ethernet gives various benefits o'er different LAN technologies:
• Easy to install and manage
• Affordable
• Flexible and scalable
• User-friendly to interoperate 'tween vendors
Types of Ethernet Cabling:
Ethernet can be deployed o'er 3 types of cabling:
• Coaxial cabling - most entirely deprecated in Ethernet networking
• Twisted-pair cabling
• Fiber-optic cabling
Coaxial cable, much abbreviated as coax cable, dwells of a separate wire surrounded by insulant, a metal shield, and a plastic sheath. The shield protects against electromagnetic interference (EMI), which can reason attenuation, a decrease of the durability and quality of signal. EMI can be fathered by a form of sources, such as florescent light ballasts, microwaves, cellular phone, and radio transmitters.
Coax is usually used to deploy cable TV to homes and occupations.
All of them Star topology is well known and most practical in field.
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Ethernet is a category of technologies that allows data-link and physical specs for controlling access to a shared network medium. It's came out as the superior technology utilized in LAN networking.
Ethernet was primitively built up by Xerox in the 1970s, and functioned at 2.94Mbps. The technology was standardised as Ethernet Ver. 1 by a consortium of 3 companies - DEC, Intel, and Xerox, conjointly looked up as DIX - and further rectify as Ethernet 2 in 1982.
In the midst 1980s, the Institute of Electrical and Electronic Engineers (IEEE) released a regular standard for Ethernet, defined as IEEE 802.3 standard. The first 802.3 Ethernet operated at 10Mbps, and with success supplanted competitive LAN technologies, such as Token Ring.
Ethernet gives various benefits o'er different LAN technologies:
• Easy to install and manage
• Affordable
• Flexible and scalable
• User-friendly to interoperate 'tween vendors
Types of Ethernet Cabling:
Ethernet can be deployed o'er 3 types of cabling:
• Coaxial cabling - most entirely deprecated in Ethernet networking
• Twisted-pair cabling
• Fiber-optic cabling
Coaxial cable, much abbreviated as coax cable, dwells of a separate wire surrounded by insulant, a metal shield, and a plastic sheath. The shield protects against electromagnetic interference (EMI), which can reason attenuation, a decrease of the durability and quality of signal. EMI can be fathered by a form of sources, such as florescent light ballasts, microwaves, cellular phone, and radio transmitters.
Coax is usually used to deploy cable TV to homes and occupations.
2 types of coax used Mostly in Ethernet N/W:
• Thicknet
• Thinnet
Thicknet has a broader diameter and a lot shielding, which bears larger lengths. Even so, it's less flexible than smaller thinnet, and then additional difficult to work on. A vampire tap is utilized to physically tie devices to thicknet, while a BNC connector is utilised for thinnet.
Twisted-pair cable consists of 2 or 4 pairs of copper cables in a plastic sheath. Cables in a pair twist round to each other to cut crosstalk, a form of EMI that happens when the signal from one cable bleeds or interferes with signal on different cable. Twisted-pair is very common Ethernet cable.
There is various categories of twisted-pair cable, identified by the number of twists per inch of the copper pairs:
• Cat3 - three twists / inch.
• Cat5 - five twists / inch.
• Cat5e - five twists / inch;
• Cat6 - six twists / inch, with improved insulation.
RJ45 connector is used to link up a device to a twisted-pair cable. The layout of the wires in the connector dictates the function of the cable.
While coax and twisted-pair cabling carry electronic signals, fiber optics uses light to transmit a signal. Ethernet supports two fiber specifications:
• Singlemode fiber - consists of a very small-scale glass core, granting just a single beam or ray of light to move across it. This greatly cuts the attenuation and dispersion of the light signal, supportive higher bandwidth o'er very far spaces, often measured in kilometres.
• Multimode fiber - consists of a large core, granting multi modes of light to pass over it. Multimode gets greater distribution than singlemode, resultant in smaller supported spaces.
• Thicknet
• Thinnet
Thicknet has a broader diameter and a lot shielding, which bears larger lengths. Even so, it's less flexible than smaller thinnet, and then additional difficult to work on. A vampire tap is utilized to physically tie devices to thicknet, while a BNC connector is utilised for thinnet.
Twisted-pair cable consists of 2 or 4 pairs of copper cables in a plastic sheath. Cables in a pair twist round to each other to cut crosstalk, a form of EMI that happens when the signal from one cable bleeds or interferes with signal on different cable. Twisted-pair is very common Ethernet cable.
There is various categories of twisted-pair cable, identified by the number of twists per inch of the copper pairs:
• Cat3 - three twists / inch.
• Cat5 - five twists / inch.
• Cat5e - five twists / inch;
• Cat6 - six twists / inch, with improved insulation.
RJ45 connector is used to link up a device to a twisted-pair cable. The layout of the wires in the connector dictates the function of the cable.
While coax and twisted-pair cabling carry electronic signals, fiber optics uses light to transmit a signal. Ethernet supports two fiber specifications:
• Singlemode fiber - consists of a very small-scale glass core, granting just a single beam or ray of light to move across it. This greatly cuts the attenuation and dispersion of the light signal, supportive higher bandwidth o'er very far spaces, often measured in kilometres.
• Multimode fiber - consists of a large core, granting multi modes of light to pass over it. Multimode gets greater distribution than singlemode, resultant in smaller supported spaces.
Network Topologies
A topology means both the physical and logical structure of a network. there is some types of topologies , including:
• Bus
• Star
• Ring
• Full or partial mesh
All of them Star topology is well known and most practical in field.
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