Was ist ein VLAN Interface?
VLANs (Virtual Local Area Networks) unterteilen ein bestehendes einzelnes physisches Netzwerk in mehrere logische Netzwerke. Jedes VLAN bildet dabei eine eigene Broadcast-Domain. Eine Kommunikation zwischen zwei unterschiedlichen VLANs ist nur über einen Router möglich, der an beide VLANs angeschlossen ist.
Warum verwendet man VLAN?
VLANs ermöglichen die Aufteilung eines Netzwerks in kleine separierte Einheiten. Zudem erlauben sie eine weitergehende Datenflusssteuerung. IP-Insider gibt in drei Beiträgen eine Übersicht zum Einsatz von VLANs – von den theoretischen Grundlagen bis zum praktischen Einsatz.
What is the full definition of a VLAN?
The full form of VLAN is defined as Virtual Local Area Network. The below topology depicts a network having all hosts inside the same virtual LAN: Without VLANs, a broadcast sent from a host can easily reach all network devices.
What happens if there is no VLAN in a network?
The below topology depicts a network having all hosts inside the same virtual LAN: Without VLANs, a broadcast sent from a host can easily reach all network devices. Each and every device will process broadcast received frames. It can increase the CPU overhead on each device and reduce the overall network security.
How does a LAN packet differ from a VLAN packet?
In LAN, the network packet is advertised to each and every device. In VLAN, the network packet is sent to only a specific broadcast domain. It uses a ring, and FDDI (Fiber Distributed Data Interface) is a protocol. It uses ISP and VTP as a protocol.
How are VLANs used to manage network traffic?
VLANs can help manage broadcast traffic by forming multiple broadcast domains. Breaking up a large network into smaller independent segments reduces the amount of broadcast traffic each network device and network segment has to bear.