Re: switch newbie

cmk128@xxxxxxxxxxx wrote in
news:1172325852.316741.70670@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

On 2¤ë24¤é, ¤U¤È1®É05¤À, "***** charles" <shultz...@xxxxxxxxxxxxx>
wrote:
<cmk...@xxxxxxxxxxx> wrote in message

news:1172197676.704456.125880@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Hi
My friend told me the switch will not assign IPs to clients but
router will. Is he correct?

Neither switches nor routers assign IP addresses. If you are in dhcp
mode, the dhcp server assigns the addresses. If you are in manual
mode the user assigns the IP address through some software program.

In the "old days" all these devices you are talking about were separate
boxes. Now one box many different functions - thus confusion.

What is the different between switch and router?

A switch connects 2 or more computers and makes connections
so that all the computers do not get a broadcast, only the two
computers communicating (as opposed to hub). In a hub everyone shouts
so everyone hears, in a switch only the two computers communicating get
the broadcast. Look up virtual lans and virtual circuts.

so far i know, you
can link two linksys switch to get 200% speed

The slang for getting 200% speed really means that the data is
traveling both ways at the same time. In a 100 baseT network, the
connection means that the data is traveling at 100MB/s in one way. If
the data is traveling both directions at the same time, it is like
getting 200MB/s of effective rate, or 200% speed. You don't need to
connect 2 switches together to get this phenomenon.

later.....

Hi, as you said, switch connect 2 computers, but the switch doesn't
assigne IPs for them, so how can the switch do it?

A switch is normally a layer two device. It uses the device MAC addresses
to figure out where packets need to be sent to. IP is a layer three
protocol, so the switch is ignorant of both the IP addresses and protocol.
In fact a switch will happily run other layer 3 protocols like the old
Appletalk etc without having anything specific to do with that protocol.
However modern switches often have a management function which does use
ip. There are also devices called layer 3 switches which do work at the ip
level. The main difference between a layer three switch and a router is
that a router receives an entire mtu and checks that it is valid before
making a routing decision, whereas a layer 3 switch makes the routing
decision and starts forwarding the data as soon as the ip header is
processed (assuming that the destination link is available).

Klazmon.


"hub everyone shouts so everyone hears, in a switch only the two
computers communicating get the broadcast." <------ OK, that mean
the switch is much for faster then hub. Except the matter of speed, it
there any thing else the switch can do but the hub/router don't?
thank you everybody
from cmk128@xxxxxxxxxxx


.

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