ryan81
12-12-2007, 04:32 PM
I am slightly confused on your explanation of broadcast addresses on p. 100 of the 640-802 book. I felt I understood it just fine, but then after reading that section I became unsure.
You define the following
Layer 2 Broadcasts - These are sent to all nodes on a LAN
Layer 3 Broadcasts - These are sent to all nodes on the network.
Then you go on to say that layer 2 broadcasts do not go past the LAN boundary (router). Layer 3 broadscasts reach all hosts on the broadcast domain.
Now my question. A router breaks up broadcast domains, correct? So are both layer 2 and layer 3 broadcasts stopped at the router? Are you using the word "LAN" and "network" and "broadcast domain" interchangeably? I always thought that a router breaks up broadcasts at both layers, but then the way this is worded is gets sort of confusing. I am sure I am probably mis-understanding a simple conecept but can you please explain? Where do layer 2 and layer 3 broadcasts stop? Thanks.
You define the following
Layer 2 Broadcasts - These are sent to all nodes on a LAN
Layer 3 Broadcasts - These are sent to all nodes on the network.
Then you go on to say that layer 2 broadcasts do not go past the LAN boundary (router). Layer 3 broadscasts reach all hosts on the broadcast domain.
Now my question. A router breaks up broadcast domains, correct? So are both layer 2 and layer 3 broadcasts stopped at the router? Are you using the word "LAN" and "network" and "broadcast domain" interchangeably? I always thought that a router breaks up broadcasts at both layers, but then the way this is worded is gets sort of confusing. I am sure I am probably mis-understanding a simple conecept but can you please explain? Where do layer 2 and layer 3 broadcasts stop? Thanks.