VG-AnyLan (VG =Voice Grade) is a joint development of AT&T Microelectronics, Hewlett-Packard, and IBM and is standardized by the newly created IEEE. VG-AnyLAN is a star topology. The maximum amount of repeaters (HUBs) in one network is five. The maximum length of a complete network depends on the. Overview. VG-AnyLAN is a new network technology, defined by the IEEE standard, for transmitting Ethernet/IEEE and token ring/IEEE

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What is Transfer rate? Mobile Broadband What is AppleTalk? The distance limitations for the network were shown to be Feet from hub to station or hub to hub over Category 3 or 4 cable. Flooding — What is flooding? When the hub gets such a request, it will allow the “High Priority” traffic to be sent before any of the lower priority traffic. Ethernet family of local area network technologies. A final feature of the DPA protocol which is worth noting is that after a low priority request has waited more than microseconds 0.

The first faction argued that, since IEEE What is the difference between computer networks and network communications? The end result is that the network’s speed is used more efficiently, since bandwidth is not going to be taken up by collisions and retransmitions of data.

What is Data Transmission?

VG-AnyLan in The Network Encyclopedia

With Category 5 cable, it is rated at a distance of feet. After being recognized, this person says his piece and then sits back down. The HUB scans its ports in a round-robin fasioned way. After saying what happened, and answering any questions, the discussion can return to anj subsidies. By using this site, you agree to the Terms of Use and Privacy Policy. This had the additional advantage of being less susceptible to external sources of RF interference such as other network cables, fluorescent lights, and high power lines.


Bridges — What is Bridges? A Made IT project http: Features of the package level or network layer What is EtherTalk?

They do not have any other function than interfacing between the different sublayers so they will be described briefly. Characteristics of Digital Signal Optical Fibers: This page was last edited on 30 Augustat The maximum length of a complete network depends 100gv the cable type used.

Per clock cycle one bit is transmitted, where a low voltage represents a 0 and a high voltage an 1. An example 100v 4 pair UTP is given below:. That way, high priority traffic can’t “hog” the available speed of the network. This presented a problem with early installations that borrowed one unused twisted pair for telephone traffic but those installations were uncommon.

Ethernet Expansion What is Ethernet Frame? Although it is completely different from Ethernet and Token Ring access protocols, the details are all taken care of in the software drivers that the customer loads on workstations and servers.

The MII adds a preample, start frame delimiter and end frame delimiter. Nowadays, file servers and workstations built around high speed processors such as Intel’s Pentium chip are creating large amounts of network traffic. 100vf is Twisted-Pair Cable? Tunneling — What is Tunneling? This is done a boot time.

If everyone who had something to say spoke without any control from the Speaker, the meeting would be a noisy event where nothing got accomplished. The hubs are intelligent devices and act as a “traffic cop” for devices wishing to transmit data to the network. No one speaks out of turn, and by the end of the day, all business is complete. This article needs additional citations for verification.


Instead of following the Fast Ethernet standard for twisted pair cabling by using only 2 pairs of wires, VG-AnyLAN used all four pairs in either Category 3 or Category 5 twisted pair cable. Articles needing additional references from March All articles needing additional references All articles with unsourced statements Articles with unsourced statements from June This makes BaseVG an inherently half-duplex medium like e.

This is called Link Training. Another faction wanted to change to a polling architecture from the hub they called it ” Demand Priority Protocol ” in order to maintain the 10BASE-T distances, and also to make it a deterministic protocol.

This way a balanced data patern is created containing equal amounts of 1s and 0s. Characteristics of Analog Signal. Characteristics of Switching Hub.

Broadband versus Baseband What is Ethernet? After that a 5B6B encoding scheme is responsible for putting the 5 bit quintets into 6 bit symbols. While control signaling uses two pairs for each direction simultaneously, all four pairs are switched to a single direction during data transmission, as required and defined during control signaling.

Fast Ethernet switches were not commonplace at first because of high cost and limited availability so, initially, VG had a significant performance advantage. Type of bound transmission media Explain Unbound transmission media – What is Unbound transmission media. If it is used with Category 3 or 4 cable, then it can operate at a distance of up to feet.

The maximum amount of repeaters HUBs in one network is five.