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What is VLAN

Chapter 55
Encyclopedia of Networked and Virtual Organizations
Virtual Local Area Network (Virtual LAN). Applies to a set of network nodes that behave as if they are connected to the same wire even though they may actually be physically located on different segments of a LAN. VLANs are based on IEEE 802.1Q. They are configured through software. Each VLAN has its own ID. Active equipment supporting VLANs is required.
Published in Chapter:
Development of a University Networking Project
Almudena Moreno Mínguez (Universidad de Valladolid, Spain) and Enrique Crespo Ballesteros (Universidad de Valladolid, Spain)
Copyright: © 2008 |Pages: 14
DOI: 10.4018/978-1-59904-885-7.ch055
Abstract
A communications channel has an important dependence for the channel capacity (C, in bps) to channel bandwidth (W, in Hz) ratio; this is capacity per unit bandwidth on signal to noise ratio (S/N, power of the signal over power of noise). Shannon’s formula gives an upper limit for this dependence (Shannon & Weaver, 1949), C/W=log2 (1+S/N), which represents channel efficiency. Phase lock loops for waves and data symbols in the presence of noise have been given (Reis, Rocha, Gameira, & Carvalho, 2005).
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Chapter 27
Ethernet to the Doorstep of Metropolitan Area Networks
The virtual LAN is a logical segregation of a physical LAN into many different logical LANs. A computer connected to one Virtual LAN cannot communicate directly with a computer connected to a different virtual LAN, even if they are both connected to the same physical LAN.
Published in Chapter: Ethernet to the Doorstep of Metropolitan Area Networks; From: Encyclopedia of Internet Technologies and Applications
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Chapter 5
Software-Defined Networking in Aviation: Prospects, Effectiveness, Challenges
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