Questions tagged [atm]

For questions about Asynchronous transfer mode (ATM), where the use of ATM technology has eventually been largely superseded by Internet Protocol (IP)-only technology.

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1answer
108 views

packet-switching, circuit-switching, PVC and SVC

I am studying by this book: West, Jill. Network+ Guide to Networks.. [VitalSource]. What I understand from what is explained there is that there are two kind of virtual circuit technologies PVC and ...
2
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2answers
483 views

What are the reasons for ADSL to use ATM instead of Ethernet

I'm a newbie to networking and I wonder what are the reasons for ADSL to use ATM instead of Ethernet ?
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1answer
136 views

Why are Frame Relay, ATM and MPLS called “Layer-2 VPN”?

A VPN results, when two physically separate networks become virtually one bigger network. But Frame Relay, ATM and MPLS don't do that, they just connect two network, but they don't unify them. So ...
1
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1answer
255 views

WAN lines types - understanding leased line/circuit

Studying the WAN lines types, am I right regarding the statements below, or if not, could you correct me please: A real leased line, could be performed with TDM on a line with for example SDH, TDH or ...
2
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1answer
411 views

When X.25 or ATM were used in ISP networks or Internet backbone was the protocol running over this layer still TCP/IP? [closed]

What was the protocol usually used on top of X.25 and ATM or even Frame Relay Networks when those were commonly used? Was it also TCP/IP protocol stack or some other protocol stack? From what I know ...
3
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1answer
472 views

What's the difference of TR-069 and Point-To-Point protocol?

I've read my ISP, Telecom uses a Point-to-Point regarding the ADSL networking over ATM nowadays (which is rarely used in my country, and it's non-commercial). My friend told me it actually uses TR-069,...
3
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0answers
69 views

PVC not Accepted by CISCO 878

I have the following config. set up for an MPLS network on my CISCO 878: Current configuration : 941 bytes ! version 12.4 no service pad service timestamps debug datetime msec service timestamps log ...
1
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1answer
1k views

ATM protocol: VCI and VPI definition

I want to answer a past exams question with a clean/simple way about: Why does ATM protocol use for virtual circuit numbering both VPI and VCI logical numbers? From what I've understood: The VCI ...
8
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1answer
611 views

Is ADSL's UDP packet forwarding rate strictly linear to packet size?

Suppose an ADSL2 Annex A device had a upload speed of 300kbps; tested using a TCP connection. Now suppose I want to send 8-byte UDP keep-alive packets at the maximum possible rate*. Would the ...
2
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2answers
7k views

Causes of low SNR

I am using a ADSL 2+ broadband service. My router shows very low SNR margin. While I quite understand what is SNR, I was curious to know what causes low SNR practically.
10
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1answer
3k views

Is ATM still used as a transport protocol?

In addition to reading new material, I enjoy reading older networking books in attempt to see where we've come from and possibly where we're going. Currently, I'm reading a book called Cisco LAN ...