Contents
- 1 What is the most common standard associated with VLANs?
- 2 Is LAN and VLAN the same?
- 3 How are VLANs different from normal LANs Why do we use VLANs?
- 4 What is VLAN and its advantages?
- 5 What are benefits of VLANs?
- 6 What makes a VLAN different from a LAN?
- 7 How to access the extended range of VLANs?
- 8 Can a router use DHCP with two VLANs?
What is the most common standard associated with VLANs?
IEEE 802.1Q
The protocol most commonly used today to support VLANs is IEEE 802.1Q. The IEEE 802.1 working group defined this method of multiplexing VLANs in an effort to provide multivendor VLAN support.
Is LAN and VLAN the same?
LAN stands for Local Area Network is a group of network devices which allow the communication between connected devices. On the other hand VLAN stands for Virtual Local Area Network which is used to enhance the performance of LANs (Local Area Networks).
What is the standard VLAN range?
VLAN Ranges
| VLANs | Range | Usage |
|---|---|---|
| 1 | Normal | Cisco default. You can use this VLAN but you cannot delete it. |
| 2-1001 | Normal | For Ethernet VLANs; you can create, use, and delete these VLANs. |
| 1002-1005 | Normal | Cisco defaults for FDDI and Token Ring. You cannot delete VLANs 1002-1005. |
| 1006-4094 | Extended | For Ethernet VLANs only. |
How are VLANs different from normal LANs Why do we use VLANs?
The purpose of a VLAN is simple: It removes the limitation of physically switched LANs with all devices automatically connected to each other. With a VLAN, it is possible to have hosts that are connected together on the same physical LAN but not allowed to communicate directly.
What is VLAN and its advantages?
VLANs provide a number of advantages, such as ease of administration, confinement of broadcast domains, reduced broadcast traffic, and enforcement of security policies. VLANs provide the following advantages: VLANs enable logical grouping of end-stations that are physically dispersed on a network.
What is difference between standard VLAN extended VLAN?
Extended VLANs are used just like normal VLANs; only different range. Extended VLANs must be configured on Switches that are in VTP Transparent mode only. Extended VLANs can not be configured using VLAN database mode (only configuration mode). Extended VLANs are saved in the configuration file.
What are benefits of VLANs?
What makes a VLAN different from a LAN?
Virtual local area networks, or VLANs, have become important as network complexity has exceeded the capacity of typical local area networks (LANs). Originally, a LAN connected a group of computers and associated devices to a server via cables in a shared physical location (hence the term “local”).
What are the devices assigned to the VLAN?
Since security of the administrative devices is important, the administrative network must be physically or virtually separated from the academic network. The administrative network devices will be assigned into VLAN 100, and all academic network devices will be assigned into VLAN 200.
How to access the extended range of VLANs?
To gain access to the extended range of VLANs, you must first configure VTP version 3, place the switch into VTP transparent mode, or disable VTP completely. Not all Cisco Catalyst switches support the configuration of all 4,090 VLANs (4,094 minus the four reserved); this is a limitation in the hardware of the switch.
Can a router use DHCP with two VLANs?
The routers can use the Dynamic Host Configuration Protocol (DHCP) to enable automatic assignment of IP configurations for nodes on these networks. Figure 5-1 shows a typical deployment scenario with two physical LANs connected by the router and two VLANs.