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Home > Archive > CCNA > February 2001 > Switch Question
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| Braveheart 2001-02-16, 5:24 am |
| 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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| 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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| 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). | |
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| 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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