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General Forum: Information Technology | | ATM Switch Vs Ordinary switch | |
| well ! hope the req is answered correct, further cud anyone explain me more on QoS??
I would liek to have Quality check w.r.t the n/w. what is the purpose of QoS? where exactly it's use??
Kiran
Posted by: Mr. Kiran Reddy At: 7, Nov 2003 11:52:12 AM IST
Yeah..true. To add to that these ATM switches are also widely deployed in campus networks wherein it is used as a backbone technology instead of using the legacy infrastructures such as Ethernet, Token Ring, FDDI etc..
But as a rule of the thumb, ATM should be implemented where there is a need for quality of service(QoS). In contrast, if your primary goal is to just interconnect high band-width endpoints then I'd say GigE(Gigabit ethernet) should be the choice.
Thx.
-Nagendra
Posted by: Mr. Nagendra Reddy At: 7, Nov 2003 9:21:54 AM IST
oh ! that was extremely huge and good. And here is my explanation which cud be considered, but anyhow here we go...
Atm switches use the signaling standard of ATM. Your ordinary or regular
switches use LAN technoloies such as Ehternet and Fast Etherenet and
some with Gigibit Ethernet.
ATM switches many times will be a core or
service provider switch for a core or service provider network or even a MAN to
be used as a WAN switch.
I believe that Ordinary switches are business switches that are interanl on the LAN for the most part.
Correct me if am wrong!
M.. thanks for the req !
Cheers,
Kiran
Posted by: Mr. Kiran Reddy At: 7, Nov 2003 8:08:18 AM IST
If for a second, we keep all the different underlying technologies(IP-packet,ATM-cell etc..) as well as marketing sweet talk of different companies aside, a router and a switch in essence exactly means as to what their name suggests, i.e, a router routes packets and a switch just switches those packets...as simple as that.
In other words, a router which generally operates at layer 3(network layer) uses different routing protocols, metrics and alogorithms to select the best route to divert the packets while the switch operates at layer 2(data link layer) and depending on the switch fabric just switches the packets to devices on the SAME subnet. A switch cannot be used to interconnect two different networks while it is possible with a router.
Now more specifically, an ATM switch accepts a cell from another ATM switch or an end point, reads the ATM header and other information in the cell, looks up the local translation table and then retransmits that cell onto the outgoing link with new header info as defined in the lookup table.
Hope that helps a lil bit..
(a href="http://nagendra.net/FAQ/faq.php?lang=en&display=faq&onlynewfaq=0&catnr=9&nr=95&prog=NW")http://nagendra.net/FAQ/faq.php?lang=en&display=faq&onlynewfaq=0&catnr=9&nr=95&prog=NW(/a)
Thx.
-N
Posted by: Mr. Nagendra Reddy At: 6, Nov 2003 12:28:59 PM IST
Yes'day me & one of my f'nd had a discussion abt this topic ... so according 2 her ATM switch is diff frm normal switch & she also told that ATM Switch is similar 2 Ordinary Router. Is it? Can anyone of u add some points 2 this :)
Posted by: Mrs. MadhaviReddy Madhu At: 5, Nov 2003 9:03:36 AM IST
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