1, IPTV Realization Broadband Network Digital TV , Also known as IPTV, or BTV, the interactive television network is a use of broadband Internet, multimedia and other technology, and to home users, including a variety of interactive digital television services, including new technology. It is well adapted to today’s trend of rapid development of the network, full and effective use of existing broadband network resources.
(1) Computer: In this mode, the user access to the Internet via computers at the same time, you can listen to Broadcasting Programs or listening to music, or directly on the computer watching TV or movies on video.
(2) Network STB (STB) + regular TV. New user home network STB (STB), set-top boxes provided by the AV interface, direct and regular TV is connected, users selected by controlling the set-top box to watch broadband TV network.
PC users can enjoy both traditional and online games INTERNET data services can also be converted through specialized equipment STB, with a normal TV watching TV, movies and other broadband video programming.
2, IPTV the key technology The essence of
IPTV applications Streaming Media In broadband transmission and distribution network, so IPTV application and development of key technologies by applying the following results.
(1) broadband access technologies: the rapid development of broadband access technology for the transmission of media stream provides a path.
Used in the current broadband access technologies, DSL is provided through regular telephone line broadband data services technology. We used the ADSL (AsymmetricalDigitalSubscriberLine, Asymmetric Digital Subscriber Loop) technology to provide downstream bandwidth 8M, ITU-T’s G.992.1 ADSL standard is already on a detailed definition. With the rapid development of technology, ITU-T another in June 2002 and January 2003 launch of two next-generation ADSL standards: ADSL2 (G.992.3) and ADSL2 + (G.992.5). ADSL2 support the maximum downlink rate 1.3M/15M, while support for ADSL2 + the maximum downlink rate of up to 1.3M/24M. Higher bandwidth for the transmission of large amounts of streaming possible.
(2) IP multicast routing: strong support for streaming media distribution.
IP multicast routing technology to achieve high-performance IP network, multipoint data transmission. Can effectively save network bandwidth and reduce network load. Multicast allows a sender to one or more (multicast source) while sending the same data packet to multiple recipients of a network technology, is an increasing backbone can not load the case, multiply business users to increase the number of effective programs, it has become the first choice for high-volume video service program. In IPTV applications, the use of IP multicast routing technology, can effectively distribute the media stream, reducing network traffic. Function of the current access device through IGMPProxy to achieve the user’s demand to join and leave other functions, so both the on-demand streaming media to achieve the distribution. And reduce the multicast on the bandwidth usage. With IP Multicast in the application of integrated access devices, most devices support IGMPsnooping and IGMPProxy function.
IGMPsnooping solve IP multicast network devices in the broadcast flooding the second floor is a basic solution. Network device through the second floor frame to listen to the client and the IGMP multicast routing protocol messages between devices, users get a list of multicast service information, the multicast user information based on the current forward to achieve the second floor of the multicast suppression The purpose of flooding.
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#1 by nit on August 11th, 2010
This looks rather like http://answers.yahoo.com/question/index;_ylt=Ai5n9CN4mSh6pZkQCftit8nsy6IX;_ylv=3?qid=20091126082329AACrlGs&show=7#profile-info-0YhOaNLwaa
#2 by trueblue on August 11th, 2010
They are different layers though, so depending on what are you asking for.
1) Physical interconnection between to devices with no wires, hot topic.
2) Compression algorithms and Quality of Service. Hot topic
3). Security. Always a hot topic
4). Quality of service again, congestion control, mechanisms to avoid packet losses and network collapse. Old topic but still warm
5). You mean NAS? This is an application of several of the others. Interesting concept.
6). Always a hot topic. With wireless ad-hoc networks, even more. Routing has been always an interesting problem, and tons of people work on developing a good strategy to route across wireless only environments (ad-hoc)
7). Exploiting the high bandwidth capabilities of FO is certainly a hot topic. Higher speeds are important for big backbone networks for internet. Perhaps not a niche market for consumer products yet. Still very important.
#3 by gowribuvan on August 11th, 2010
go to howstuffworks.com and type how telephones work how wifi works and you will get your desired results for sure good day.
#4 by Howie on August 11th, 2010
If you have any aptitude and interest in programming, go with CIS. The relevant jobs for CIS tend to come with higher pay, job satisfaction, and respect than those for CIT.
#5 by live and learn on August 12th, 2010
Those class numbers are not relevant as they pertain to your specific school. From what I gather, you've taken ICND1 (cisco class) and are working on standards and protocols? a basic networking class.
If you're interested in networking then you should try to do better. Speaking from experience, IT Directors look at your GPA and your experience. I can tell you for fact that one of my professors is the IT Director for American Express and he told us that you don't get to him unless you have a minimum GPA of 3.0 (they hire the 3.5 and 4.0 first, then down to the 3.0 and up students)
Learn as much about Cisco as you can. It's a great time to be networking. The current expectation is that networking will increase (staff) by 54% over the next 5 years!
#6 by drokk on August 12th, 2010
I would not hire somebody with an online degree personally, this is a field where you need hands on experience which cannot be obtained online. When a server goes down how will you check the error codes on the front if it is online?
Misdemeanors, depending on the state you live in, might not need to be reported on job applications. I would not hire somebody with any criminal record for my own company.
#7 by bladecrimson on August 13th, 2010
Becuase transport technology falls under telecommunications technology and networking only goes as far as to educate one in packet routing/switching. Very few network people care to look beyond routers and servers, because transport technologies like TDM and ATM are based on entirely diffirent principles and dont care about data or packets, only framing and bandwidth, and LEC interconnections.