Virtual LAN. A function that creates logically separate networks (broadcast domains) on the same physical equipment, typically per switch port. Between switches, VLANs are distinguished by IEEE 802.1Q tags.
Japanese name: VLAN
VLAN appears in 1 practice question across 1 topic, including Computer Networking Basics.
Field: Computer Networking Basics
Answer: C. Broadcasts sent by devices in VLAN 10 do not reach VLAN 20 ports, and traffic between VLAN 10 and VLAN 20 needs a router (or L3 switch)
A VLAN (virtual LAN) creates logically separate networks on the same physical equipment, typically on a per-port basis. Each VLAN has its own broadcast domain, the range a broadcast reaches, and the switch forwards frames only between ports in the same VLAN. Traffic between different VLANs, such as VLAN 10 and VLAN 20 in this example, must therefore pass through a router or L3 switch that relays it at layer 3. When VLANs span several switches, a tag (VLAN ID) defined by IEEE 802.1Q is inserted into frames to indicate which VLAN they belong to. VLANs are used to separate networks by department, or to isolate a guest wireless LAN from the internal network.
A VLAN (virtual LAN) creates logically separate networks on the same physical equipment, typically on a per-port basis.
On one L2 switch, VLANs are configured so that ports 1–4 ar…As an Amazon Associate I earn from qualifying purchases.
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