Archived from groups: alt.internet.wireless (
More info?)
exelent info,
thanks.
"Ron Bandes" <RunderscoreBandes @yah00.com> wrote in message
news:Qw65d.8290$6X1.11246805@news4.srv.hcvlny.cv.net...
> "Dennis" <sava7@comcast.net> wrote in message
> news:abadnbNvkPj1dMncRVn-ig@comcast.com...
>> some one said:
>> you can connect 256 laptops/PCs to the same wireless router
>>
>> "John Doe" <Teranews@Teranews.com> wrote in message
>> news:1095900772.tCt5kfygXtajEcyXN6fEYA@teranews...
>>> using a billion adsl wireless router for internet connection for one
>>> notebook
>>>
>>> how to get another notebook to use the same wireless connection?
>>>
>>> tia
>
> Most residential wireless routers use a subnet mask of 255.255.255.0,
> which leaves 8 bits for host numbers. One of the host numbers (0) is for
> the subnet address, one (255) is for the subnet (directed) broadcast
> address, and one is for the router. That leaves 253 IP addresses for
> other hosts (laptops/PCs).
>
> However, the number of IP addresses is only one limitation imposed by the
> router. Another is the router's and AP's memory for tables. The AP (in
> the wireless router) needs a station table, and the router needs an ARP
> table. It's unlikely that a residential (as opposed to enterprise-class,
> like Cisco) wireless router supports 253 hosts.
>
> Another limitation is imposed by the bandwidth and the fact that wireless
> uses shared bandwidth, not switched. Also, some bandwidth is wasted by
> the Collision Avoidance scheme compared to a wired network's Collision
> Detection scheme. And when a wireless network does fall back on Collision
> Detection, it's not as clean as in a wired network. This all results in a
> practical limit well below 253 hosts. I've seen a rule of thumb to
> install an AP for every 20 users using 802.11b; I would expect that number
> to be increased for 802.11g.
>
> Ron Bandes, CCNP, CTT+
>
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