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Consider a compressed video transmission in an ATM network .suppose standard ATM cell must be transmitted through 5 switches,the data rate is 43 mbps.what is the transmission time for one cell through 1 switch?

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Looking at your problem it does not appear to be a shoe problem but an ATM network problem. This question has not been answered because it is under the wrong category so the wrong experts are looking at it. If you try changing the category to something more similar then you have a better chance of getting a helpful answer back.

Posted on Jun 16, 2011

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Posted on Jan 02, 2017

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How to Enable a Switch to Transparently Transmit BPDUs That Are Discarded by Default?


You can enable a switch to transparently transmit BPDUs in the following modes:
1. Run the bpdu bridge enable command to enable the port bridge function. Then the switch can transparently transmit all BPDUs.
2. Globally specify the group MAC address of BPDU for the inbound and outbound ports of two edge switches on the network, and enable the L2PT transparent transmission function of the protocol for the ports.
Incoming BPDUs are replaced with the group MAC address, converted to data packets, and forwarded in the VLAN. Configure the L2PT function in the outbound port to replace the group MAC address with the BPDU MAC address.

Jul 11, 2016 | Computers & Internet

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How to convert MPG to FLV/SWF? What is MPG? Short for M oving P icture E xperts...


How to convert MPG to FLV/SWF?
What is MPG?
Short for M oving P icture E xperts G roup, and pronounced m-peg, a working group of ISO. The term also refers to the family of digital video compression standards and file formats developed by the group. MPEG generally produces better-quality video than competing formats, such as Video for Windows , Indeo and QuickTime . MPEG files can be decoded by special hardware or by software. MPEG achieves high compression rate by storing only the changes from one frame to another, instead of each entire frame. The video information is then encoded using a technique called DCT. MPEG uses a type of lossy compression, since some data is removed. But the diminishment of data is generally imperceptible to the human eye.
There are three major MPEG standards: MPEG-1, MPEG-2 and MPEG-4.
1.The most common implementations of the MPEG-1 standard provide a video resolution of 352-by-240 at 30 frames per second (fps). This produces video quality slightly below the quality of conventional VCR videos.
2.MPEG-2 offers resolutions of 720x480 and 1280x720 at 60 fps, with full CD-quality audio. This is sufficient for all the major TV standards, including NTSC , and even HDTV . MPEG-2 is used by DVD-ROMs . MPEG-2 can compress a 2 hour video into a few gigabytes. While decompressing an MPEG-2 data stream requires only modest computing power, encoding video in MPEG-2 format requires significantly more processing power.
3.MPEG-4 is a graphics and video compression algorithm standard that is based on MPEG-1 and MPEG-2 and Apple QuickTime technology. Wavelet -based MPEG-4 files are smaller than JPEG or QuickTime files, so they are designed to transmit video and images over a narrower bandwidth and can mix video with text, graphics and 2-D and 3-D animation layers. MPEG-4 was standardized in October 1998 in the ISO /IEC document 14496.
What is flv or swf?
FLV is Flash video files, and is basically a stream of images and sound. This means you can stream these from a stream server, and get benefits like the ability to start streaming from anywhere in the file and such processing.SWF files are not streaming media, but complete files with scripts and more. This means they will transfer over the http protocol from the first byte and if you need something in the last end of the file you will have to wait for the whole file to transfer.If you however transfer the FLV file over HTTP the same applies also there. But FLV files can with macromedia media playback be transferred over the streaming protocol in a different fashion.That was a short summary for how you can use the two files differently.FLV can also be used as video inside your animation as any other video. And it offers possibility of masking and so on, which swf have more limits with.
if u wanna add ur videos to website? .flv files are the preferred choice !just cause it will takes smaller size,transmits fast ....flv has been the main video format applied on the website ! so the demand to convert mpeg to flv becomes more and more,Today i'll take video to flash encoder as an exmple to introduce how to convert mpeg to flv or swf...

Step1 Add source file(.mpeg)



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on Dec 30, 2009 | Computers & Internet

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Can you give me some information about Huawei OSN 3500, our company wants to buy a Huawei OSN3500. Thank you!!


Huawei OSN3500 is Huawei MSTP optical transmission equipment, is a kind of Huawei OSN series, is now in the industry with a relatively wide range of optical transmission equipment. OSN 3500 intelligent optical transmission system to support packet switching and transmission, and inherits all the characteristics of MSTP technology, compatibility with traditional SDH, MSTP network and thawing SDH / PDH, Ethernet, WDM, ATM, ESCON/FC/FICON, DVB-ASI, RPR, built-in PCM and technology for various applications in aggregation and core layer of a new generation of integrated 10G/2.5G multi service intelligent optical transmission platform.
Support products to intelligent optical network smooth evolution. Mainly used in the industry market convergence layer and the core layer, and pieces and OSN9560/OSN7500/2500/1500 sharing; OSN3500 supports smart characteristics of, can complete end-to-end business automatic configuration, SLA service, traffic engineering, optimization of time slot defragment, mesh clock tracking, effectively improve the network utilization.
In fact, more detailed information, you can consider directly to the official website of Thunder-link, or professional consulting Thunder-link seller. Here is their website, www.thunder-link.com.
7nlg7e

Jan 04, 2016 | Huawei Cell Phones

1 Answer

Can i do videocall from nokia 6303i


Yes, if the following features are supported by your phone and your carrier: 1.The network must be fully compliant with the UMTS standards for 3G telecommunications to handle the data influx incurred during voice call as its' a data intensive service. 2.I would recommend that you subscribe for an unlimited data plan with your carrier.This is because video calls are very data intensive in nature(taking about 1.2MB per frame per second to stream H.264-MPEG video data over RTSP) and the voice and data are charged simultaneously. 3.Good signal strength is recommeded. 4.Low latency on the transmitted data is an added advantage.

Dec 18, 2010 | Nokia 6303i Cell Phone

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I have 6mbps speed but my speed get too slow on my modem. so how can i improve my speed.


is that a phone modem

this are conventional speeds expected:
  • Conventional Ethernet can transmit data at rates from 10 Mbps up to 100 Mbps.
  • Phoneline networking specification, HomePNA 2.0, transmits data at rates up to 10 Mbps.
  • One type of powerline networking technology promises data speeds up to 189 Mbps.
  • Wireless Ethernet has data transmission rates up to 11 Mbps.
  • HomeRF goes up to 1.6 Mbps.
  • Bluetooth goes up to 3 Mbps.
the speeds noted above are theoretical as other factors WILL affect your connection speed and WILL LIKELY lower the connection speed between your device and the ISP.

for comparison check on www.speedtest.net and compare other isp, changing isp is your more concret solution.

Nov 22, 2009 | 2wire Computers & Internet

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2. Consider compressed video transmission in an ATM network. Suppose standard ATM cells must be transmitted through 5 switches. The data rate is 43 Mbps. a. What is the transmission time for one cell...


Sounds like a "homework" question to me.
Tell your teacher that I am doing your homework for you.

If each cell is 4.3 mbits, then each cell takes 10 seconds to go "through" each switch. So, on the average, one must wait 5 seconds
(given a minimum of 0 and a maximum of 10) for the switch to complete sending an "active" cell. Then, actually transmitting one cell will take 4.3/43 seconds, i.e., 10 cells per second.

So, having 5 switches means 4 (or is it 5?) delays, i.e., 4 (or 5) times (10 seconds plus 0.1 seconds) resulting in a maximum of about one minute.

QED

Nov 06, 2009 | Computers & Internet

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I have been getting terrible download speeds. I am with telus and there cheapest plan offers speeds of a little over 200 kbps. I am getting about 60. Is this the router or them?


Hi! your modem is a dlink dsl 300, if the modem is connected directly to your computer and you are only getting a speed of 60kbps..there is a chance that there is a problem with the modem.
this is the feature of ur modem:
Features

  • ANSI T1.413 issue 2 (Full rate DMT over analog POTS)
  • G.dmt (ITU-T G.992.1)
  • G.lite (ITU-T G.992.2)
  • G.hs (ITU-T G.994.1)
  • G.lite ADSL: Downstream data rate up to 1.5Mbps. Upstream data rate up to 512Kbps.
  • G.dmt: Downstream data rate up to 8Mbps. Upstream data rate up to 864Kbps
  • Supports G.hs, a handshaking protocol at start-up to negotiate and identify the operating mode for the DSL
  • Supports a wide range of DSLAM's for inter-operability
  • Complies to the T1.413 issue 2 standard (includes cable gauges like 24AWG (0.5mm) and 26AWG (0.4mm))
  • RFC 1483 IP over ATM
  • RFC 1483 Ethernet over ATM
  • Supports bridging/DHCP, classical IP over ATM, PPP over ATM, and Embedded PPP over Ethernet
  • 1 RJ-11 port for ADSL connection
  • 1 RJ-45 port for 10 BaseT Ethernet LAN connection
  • 1 Console (RS-232/DB9) port for local configuration
  • SNMP management agent base MIB-enables other processes to provide statistics and other information to remote management applications
  • TFTP : The built-in Trivial File Transfer protocol provides firmware upgrade and configuration backup and restore
  • Telnet provisioning
I this modem is supplied by telus you have to inform them about it so that they can replace this modem right away... and this is a discontinued product from dlink.

Aug 16, 2009 | D-Link DSL 300 Modem

1 Answer

Layer3


Which model are you talking about ? I have included both


Here is the OSI model
Layer 1 = physical medium & signal on the wire (physical)
Layer 2 = MAC Address and SNAP (ATM) (data link)
Layer 3 = IP Addressing V4 V6 (network)
Layer 4 = TCP/UDP (RTP, RTSP) (transport)
Layer 5 = Duplexing Half or full (Session)
Layer 6 = HTTP, FTP, SNMP (presentation)
Layer 7 = Web browser, FTP Client, (application)

TCP Model:
Layer 1 = physical medium & signal on the wire (physical) (Hub and reapeter)

Layer 2 = MAC Address and SNAP (ATM) (data) (Switches and bridges)

Layer 3 = IP Addressing V4 V6,
Layer 4 = TCP/UDP (RTP, RTSP) (Internetwork) (Firewall, IPSEC) Routers

(This function is split between 4&5) Duplexing Half or full

Layer 5 = , HTTP, FTP, SNMP, Web browser, FTP Client, (application) (programs)


I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Feb 11, 2009 | IBM Nways 8277 Model 524 Networking Switch

1 Answer

What is osi model


The 7 Layers of the OSI Model
Last updated: March 03, 2008
The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station, proceeding to the bottom layer, over the channel to the next station and back up the hierarchy.
Application
(Layer 7)
This layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Tiered application architectures are part of this layer.
Presentation
(Layer 6)
This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems. It is sometimes called the syntax layer.
Session
(Layer 5)
This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination.
Transport
(Layer 4)
This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer.
Network
(Layer 3)
This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.
Data Link
(Layer 2)
At this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. The data link layer is divided into two sub layers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sub layer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking.
Physical
(Layer 1)
This layer conveys the bit stream - electrical impulse, light or radio signal -- through the network at the electrical and mechanical level. It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. Fast Ethernet, RS232, and ATM are protocols with physical layer components.



For further details go to:

http://en.wikipedia.org/wiki/OSI_model

Jan 13, 2009 | Computers & Internet

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