|
Home > Archive > CCNA > December 2000 > switching
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
|
|
|
| just wanted to get some clarification on switches is it true that switches only break up collision domains not broadcasts but a vlan will break up both. thank you | |
|
| Every port on a switch is in a separate collision domain. A collision on port 1 will not affect devices/segments connected to port 2. This results in higher net available bandwidth for devices attached via a switch rather than a hub.
You can group ports on switches into VLANs. Each VLAN is in a separate broadcast domain. A broadcast in VLAN 1 will not reach ports assigned to VLAN 2.
Note, however, that in the case of VLANs, the switch is breaking up broadcast domains, but only because it has been configured for VLANs. Otherwise, all ports on a switch are in the same broadcast domain.
Hope this helps,
Skip | |
|
| thank you so on the test if it doesnt mention vlans on a switch ? you would just be breaking up collision domains and not broadcast domains | |
|
| Switches break up collision domains.
VLANs break up broadcast domains.
Note, however, that VLANs do not have any effect on collision domains... the breaking up of collision domains is a native function of the switch, whether VLANs are configured or not.
Cheers,
Skip |
|
|
|
|