Computing.Net - broadcast IP

Subject: broadcast IP

Original Message

Name: hing_hk
Date: December 5, 2007 at 21:09:09 Pacific
Subject: broadcast IP
OS: Network
CPU/Ram: Not specified
Model/Manufacturer: Cisco

Comment:

I believe if the R1 receive a packet with destination address 192.168.1.255, it will broadcast it to every host, Host 1 and Web Server 2 , since the last octet is all '1' ->255. Yet, my friend believe the R1 will drop the packet. Could anyone please advise on this and give as much elaboration as possible. Thank you.
Thank you, conscientious student

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Response Number 1

Name: hing_hk
Date: December 5, 2007 at 21:21:20 Pacific
Subject: broadcast IP

Reply: (edit)

O I have attached a graph, it seems not working. Let me attach it again.
Thank you, conscientious student

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Response Number 2

Name: hing_hk
Date: December 5, 2007 at 21:33:29 Pacific
Subject: broadcast IP

Reply: (edit)

!? I still can not attach the picture. Let me try again
Okay, I have tried three times already but still doesn't work. Please refer to this link = <http://www.esnips.com/imageable/medium/1a5432c0-e727-44f8-95a0-e17d8f0f3ee6/?du=64d2f284-9087-102a-8e73-0017a4493db2&uu=284abeaa-3da8-4a3c-bcd0-9ee281419707&dt=1196910726000&fu=85ebc89a-1252-41c3-9cbd-6db2aab45728>

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Response Number 3

Name: wanderer
Date: December 6, 2007 at 08:19:41 Pacific
Subject: broadcast IP

Reply: (edit)

If R1 is a router your friend is correct. Unless configured to pass thru, a router will drop the broadcast. A router will not rebroadcast the broadcast on a lan.
Are you ready for where Microsoft wants you to go today?

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Response Number 4

Name: hing_hk
Date: December 7, 2007 at 22:51:13 Pacific
Subject: broadcast IP

Reply: (edit)

Could you please explain what do you mean by rebroadcast?
I assume that if I send a packet to the R1 with an IP address 192.168.1.255, the R1 should broadcast the message to every host on the LAN.

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Response Number 5

Name: wanderer
Date: December 9, 2007 at 20:42:26 Pacific
Subject: broadcast IP

Reply: (edit)

why do you think a router would rebroadcast ANY broadcast?
Ask yourself these questions:
1. does a router NAT/Route a broadcast? If that isn't obvious then how can a broadcast be routed?
2. why would a router drop a broadcast? Hint: bandwidth saturation
Now don't confuse broadcasts with multicast. Two different animals.
http://www.inetdaemon.com/tutorials...
Are you ready for where Microsoft wants you to go today?

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