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Cisco > CCNA > Switch Question

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Author Switch Question
Braveheart
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Registered: Dec 2000
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Question

The Catalyst 1200 series switch includes four models: WS-C1201, WS-C1202, WS-C1211, and WS-C1212. Using content-addressable memory (CAM) technology, models WS-C1201 and WS-C1211 can learn up to 1,024 Ethernet addresses, and models WS-C1202 and WS-C1212 can learn up to 4,096 Ethernet addresses.

took from :
http://www.cisco.com/univercd/cc/td...12icg/61644.htm

anyone can explain why should the switch learn up to 1024-4096 ports as we know it only has 8 utp ports

thx

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Old Post 02-16-01 10:24 AM
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creamy_stew
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Braveheart,

A switch doesn't learn ports; it learns what MAC addresses are connected to the ports.

If, for instance, you have a hub connected to every switchport and each hub has 10 workstations connected to it, a 12 port switch would learn 10x12=120 MAC addresses.

/creamy

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firechicken
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I think the keyword is can learn that many MAC addresses...not that it actually does.

Another example: You can create some ungodly amount of subinterfaces on a router (how many, dan?) , but that doesn't mean you'll use them all...only that it does have the capacity to do so.

(Looks like the smileys have been tanning during the server upgrade).

Last edited by firechicken on 02-16-01 at 12:55 PM

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dmaftei
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Cool

quote:
Originally posted by firechicken
Another example: You can create some ungodly amount of subinterfaces on a router (how many, dan?)


Of course: 2^32, that is 4294967296 (available numbers would be 0 through 4294967295).

Cheers!

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