SignaMax 065-7931 User's Guide Page 47

  • Download
  • Add to my manuals
  • Print
  • Page
    / 109
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 46
Signamax 065-7931 16-Port 10/100/1000BaseT/TX WebSmart Switch
39
3-5. Virtual LAN
What is a VLAN?
It is a subset of a LAN. Before we discuss VLAN, we must understand what a
LAN (Local Area Network) is. In general, a LAN is composed of different physical
network segments bridged by switches or bridges which attach to end stations in
the same broadcast domain. The traffic can reach any station on the same LAN.
Beyond this domain, the traffic cannot be sent without the help of a router. This also
implies that a LAN is limited. If you need to communicate with the station outside
the LAN, a router is needed, which always lies on the edge of the LAN.
For a layer 2 VLAN, it assumes it is a logical subset of a physical LAN
separated by specific rules such as tag, port, MAC address, and so on. In other
words, they can communicate with each other between separated small physical
LANs within a LAN but can not be between any two separated logical LANs.
In the figure above, all stations are within the same broadcast domain. For
these stations, it is obvious that the traffic is getting more congested as more
stations are added to it. With more and more users joining the LAN, the
performance of the network will rapidly deteriorate due to increased broadcast traffic.
In the worst case, the network may go down completely.
Fig. 3-7
Page view 46
1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 108 109

Comments to this Manuals

No comments