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Webcast-Catalyst9k
New Member

Difference between VLANs and subnets

Hi,

As of my understanding the difference between VLANs and Subnet is:

VLANs are used to separate the layer2 traffic.

Subnets are for hierarchical arrangement of Layer3 IP addresses, which inturn neccessary for Route summarization.

Regards,

Chandu

Regards, Chandu
1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Difference between VLANs and subnets

Chandra,

Yes you are perfectly correct.

VLans are used to seperate/segregate the broadcast domain.
(Simple term as you said:  VLANs are used to separate the layer2 traffic.)

More info:

virtual local area network (VLAN) is a logical group of workstations, servers and network devices that appear to be on the same LAN despite their geographical distribution. A VLAN allows a network of computers and users to communicate in a simulated environment as if they exist in a single LAN and are sharing a single broadcast and multicast domain.


Higher-end switches allow the functionality and implementation of VLANs. The purpose of implementing a VLAN is to improve the performance of a network or apply appropriate security features.


subnet

is a logical grouping of connected network devices. Nodes on a subnet tend to be located in close physical proximity to each other on a

LAN

.

Network designers employ subnets as a way to partition networks into logical segments for greater ease of administration. When subnets are properly implemented, both the performance and security of networks can be improved.

In Internet Protocol (IP) networking, devices on a subnet share contiguous ranges of IP address numbers. A mask (known as the subnet mask or network mask) defines the boundaries of an IP subnet. The correspondence between subnet masks and IP address ranges follows defined mathematical formulas. IT professionals use subnet calculators to map between masks and addresses.

HTH

Regards

Inayath

***Plz rate if this info is helpfull.

2 REPLIES
New Member

Difference between VLANs and subnets

Am i correct. Please help.

Regards, Chandu
Cisco Employee

Re: Difference between VLANs and subnets

Chandra,

Yes you are perfectly correct.

VLans are used to seperate/segregate the broadcast domain.
(Simple term as you said:  VLANs are used to separate the layer2 traffic.)

More info:

virtual local area network (VLAN) is a logical group of workstations, servers and network devices that appear to be on the same LAN despite their geographical distribution. A VLAN allows a network of computers and users to communicate in a simulated environment as if they exist in a single LAN and are sharing a single broadcast and multicast domain.


Higher-end switches allow the functionality and implementation of VLANs. The purpose of implementing a VLAN is to improve the performance of a network or apply appropriate security features.


subnet

is a logical grouping of connected network devices. Nodes on a subnet tend to be located in close physical proximity to each other on a

LAN

.

Network designers employ subnets as a way to partition networks into logical segments for greater ease of administration. When subnets are properly implemented, both the performance and security of networks can be improved.

In Internet Protocol (IP) networking, devices on a subnet share contiguous ranges of IP address numbers. A mask (known as the subnet mask or network mask) defines the boundaries of an IP subnet. The correspondence between subnet masks and IP address ranges follows defined mathematical formulas. IT professionals use subnet calculators to map between masks and addresses.

HTH

Regards

Inayath

***Plz rate if this info is helpfull.

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