Black Box LBG1000A, Руководство пользователя

Страница: 18 / 142

Broadcast Containment
In traditional networks, traffic broadcasts to all network devices, whether they are the intended recipients or not. However,
VLANs can be set up to contain only those devices that need to communicate with each other. As a result, VLANs
significantly reduce network congestion. In addition, VLANs prevent broadcast storms from causing network meltdown due
to volumes of traffic.
Multicast-Based Multimedia Applications
Multimedia applications, such as interactive training, video conferencing, and news-video transmissions, require large
amounts of bandwidth. These applications are also extremely sensitive to variable delays, which are unavoidable on a
shared Ethernet network. By defining a VLAN based on the IP multicast address for all subscribing members on the VLAN,
sufficient bandwidth will be available for these application, providing true multimedia on Ethernet.
Enhanced Security
Because VLANs are self-contained, only the devices within the same VLAN can communicate with each other. If a device in
one VLAN wants to communicate with a device in another VLAN, the traffic must go through a router.