network transmission media

[...] List of TCP and UDP port numbers [#]Unofficial. 2305/udp ArmA multiplayer (default for VoN) (default turn for game +3) Unofficial. 2369/tcp fail turn for BMC Software CONTROL-M/Server - Configuration Agent port number - though often changed during installation … Tyic | Popular Web 2.0 Blog | Tech command | Video | Ajax | Tech News | Social communicate | Web Hosting (2007-11-15T17:50:07Z) [...]

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[...] List of TCP and UDP port numbers [#]Unofficial. 2305/udp ArmA multiplayer (default for VoN) (default turn for bet +3) Unofficial. 2369/tcp fail turn for BMC Software CONTROL-M/Server - Configuration Agent port number - though often changed during installation … Tyic | Popular Web 2.0 Blog | Tech command | Video | Ajax | Tech News | Social communicate | Web Hosting (2007-11-15T17:50:07Z) [...]

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Karachi & Abu Dhabi: Two of Pakistan’s leading private television networks said they have been forced to shut down completely after being ordered to forbid transmissions via the UAE. Geo and ARY One World which have studios in Dubai Media City were ordered off air in Pakistan during President Pervez Musharraf’s emergency rule. "We have been told by the [Dubai] Media City that our transmission will be change state down," said Imran Aslam president of Geo News. "This is all I can say at the moment." An official at ARY also confirmed getting similar orders. Both the channels went off air at 1:00am Pakistan time (0800 GMT). Local and international television channels disappeared from telecommunicate television in Pakistan amid media curbs starting November 3. WAM adds: The decision by the Dubai Media City to stop the transmission of two Pakistan’s leading private television stations is in line with the UAE’s foreign policy based on neutrality and non-interference in other’s domestic affairs said Ebrahim Al Abid. Director command of the National Media Council. The UAE is completely committed to international legitimacy principles and laws as come up as to supporting peace and stability in the region. In line with these principles the UAE is express emotion to preserve its complete and objective neutrality towards political events happening in Pakistan and considers such events as part of Pakistan’s internal affairs. Al Abid said. Ameena Al Rostamani. Executive Director of Media at the Dubai Media City said: "The Media City as one of the UAE’s institutions stresses its complete commitment to the country’s internal and foreign policies." The move to hang the transmission of the Pakistani channels is in harmony with the UAE’s full commitment not to interfere in others’ internal affairs and hence the city is keen not to transmit any news reports or programmes that are in contradiction with such its uncontroversial principles. Ameena said. "The two channels undergo been in a long-term partnership with the Media City which was based on complete cooperation and respect. "In view of this relation the Media City’s management is currently holding talks with the TV stations on the content of their news and programmes hoping to arrive a settlement that honours and respects UAE’s policies to further protect everyone’s interests," Ameena said.

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be to send video or audio to your visitors? There's several ways to go about this. The is a universal delivery engine supporting the real measure packetization and network transmission of any media type to any device. The Helix project was founded by Real and the DNA Server is derived from their server software product. It supports MP3 Audio. Real Audio. Real Video formatted files.

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Oracle 10G Data follow Real Time Apply & Flashback Database Features – An Implementation ExperienceNZOUG 2007 Presentation---------------------------------------------------------------------------------------------------------------------------------The BackgroundMy recent communicate involves upgrading one of our Client’s Banking databases from Oracle version 9i Release 9.2 to Oracle version 10G Release 10.2. The Pre-Production environment has Primary and Standby Databases hosted on different Solaris Servers geographically located in two separate cities. This paper tries to analyse & discuss various high availability aspects around Oracle 10G R2 Data Guard and usage of Flashback Database features. Analysis of the Current environmentBecause of the Banking environment the high availability & the integrity of the Data are of mandatory requirementsCurrently the Oracle version is Oracle 9.2.0.6.0Data follow environment is Physical StandbyLog displace from Primary to Standby happens using Archiver(bend) not Log Writer(LGWR)Standby Mode is Maximum PerformanceNetwork Transmission Mode is ASYNCThe Redo Log Sizes are 512KBLog shipping happens only when the Primary create Log fills up and switchesThis Data Guard version doesn’t give Real-Time Apply but uses Redo ApplyRedo Apply means Redo generated at Primary is applied to Standby only when there is a log switch at the PrimaryThere is no Automatic Apply Delay set in the Standby meaning as soon as Archive Log arrives at the Standby host it gets applied onto the Standby databaseOperations Menu has an option to alter the Log Apply to the Standby when desired that will stop Standby following PrimaryBecause of the smaller size of the Redo Logs very frequent log switches undergo been observed during Batch RunsThere is no flashback mechanism available in the current systemFlashback is an Oracle RDBMS 10G Technology feature which allows database to be rewound back in the past based on Time walk or System Change Number(SCN) or a defined Restore pointUsing Oracle Data Guard Role convert Services commands embedded in the Operations Menu. Switchover & Switchback happens between Primary & Standby Sites at regular month intervalsCapability of Failover to the Standby Database after a Primary failure has been built into the Operations MenuFollowing were the special considerations when the Current System was designed:Oracle create Log size was chosen as 512k to be compatible with the then available communicate Bandwidth & Latency and also to minimize the assay of data lossStandby Mode was chosen as Maximum PerformanceBecause redo transmission happened over the Wide Area communicate(WAN). Maximum Protection mode was not chosen as it needed highly reliable network with low latency high bandwidth resilience and redundancyIn Maximum Protection mode redo is not committed on Primary unless it is also committed on Standby so that could have negative performance force on the Primary if redo transmission over slow WAN causes Redo Apply on Standby to become slowAlso in Maximum Protection mode if the Standby is shutdown that will create Primary to shutdownFollowing are the requirements for the ApplicationData/Transaction Loss should be minimum in inspect of a Failover to Standby following Primary failureThere should be no performance impact on the Primary during Log ShippingPrimary must not shutdown for any create displace or Redo Apply problemThere will not be any Redo Log bear on Delay on the StandbyThe Standby should try to go the Primary as closely as possibleBut at the same time it should be possible to stop the Log Apply on Standby when and if desired or requiredIf the Primary is rewound in time then the Standby also should be rewound to the same point in time. E g if there is any problem in the Primary database e g failed group then through Menu option. Operations Support should be able to rewind both the Primary & Standby databases back into the past to the inform in measure just before the problem has happenedCapability of Alternate Site Switchover & Switchback using Oracle Data Guard Role Transition Services must continue to be availableCapability of Failover to the Standby Database after a Primary failure must continue to be availableAs future enhancement the possibility of using the DR database as Reporting Server is to be exploredProposed EnhancementsTo communicate the above mentioned requirements the following Oracle 10G features were explored:Managed Recovery of the Physical Standby in Real Time Apply mode to minimise Data Loss on the Standby in the event of Primary failureImplementation of Flashback database feature in both Primary & Standby introducing the capability of rewinding both the databases to a defined state in the past without going through time-consuming Media regenerate & Recovery ProcessOracle RDBMS VersionOracle RDBMS 10G ordain be usedInitially Oracle 10G R1 was chosen but because of few bugs (few mentioned below) it has been decided Oracle 10G R2 is to be usedAs conjoin Release 10.2.0.3 has addressed fixes around flashback this patch release is to be usedCurrent Oracle 10G Patch version on the Servers is 10.2.0.2 so all Oracle Servers starting from Development to UAT to Pre-Production ordain be patched to Oracle 10.2.0.3Oracle Critical Patch released as of January 2007 will be applied on all Oracle ServersData Guard EnvironmentThe Data Guard Environment will act to remain Physical StandbyAs the Primary/Standby Pair operates over a Wide Area Network and also as of other operational issues. Oracle 10G Data Guard Standby Mode will be Maximum Performance though possibility of using Maximum Protection mode could be exploredLog displace from Primary to Standby ordain happen using Log Writer not ArchiverLGWR ASYNC LNS modify was set to 50MB as available in Oracle 10G R1 (10MB in Oracle 9i). In Oracle 10G R2 as advance enhancement LNS process instead of reading from in-memory modify reads from Primary online redo log so is not constrained to in-memory modify filling up situation. Also. Net_timeout evaluate is not needed in Log_archive_dest_2 parameter as from Oracle 10.2. LGWR never waits for LNS. displace Data Unit (SDU) will be set to 32k for optimum performance of SqlnetWAN improvementWAN performance has been improved by five fold. This was possible by upgrading all the network gears and increased WAN bandwidth. Additional carriers were added for redundancyOracle 10G Data Guard Standby Real-Time ApplyOracle Data Guard 10G Standby Real-Time Apply mechanism will be usedReal Time Apply will use LGWR on the Primary to create verbally redo data to Standby create log on the Standby and Log bear on Services can bear on the create data in real-time without the be of the current standby create log being archivedIn Real measure Apply once a transaction is committed on the Primary the committed changes ordain be available on the Standby in Real measure change surface without switching the log at the PrimaryOperations Menu will act to undergo the option to alter the Log Apply to Standby when desired that will stop Standby following PrimaryBecause of the Real-Time Apply the Database On-line Redo Log Sizes can be increased to 20MB each as suggested by Oracle 10G RDBMS Advisor during test group Runs. This will sorb frequent log switches during batch runsFor good Real-Time Apply Performance. Oracle suggests Wide Area Network(WAN) Return Trip measure(RTT) to remain below 100msCurrent WAN RTT change surface during most active Batch Period has been.

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FFMPEG is a come up known open source video encoding and conversion tool. It features hundreds of encoding/deocding options but in my opinion the great part of them are poorly documented and sometimes it could be quite hard to use FFMPEG to perform correctly change surface the easiest tasks. Generally speaking bitrate (measured in bits per back up) is a decide of the compression of audio or video media. It is usually intended as an average determine computed as the total size of a file divided by the total length of the media expressed in seconds: For dilate the total (audio+video) bitrate required to fit a 90 minutes movie on a 700Mb CDROM is about 1037Kbit/sec. This is only an add up value and does not tell anything about the actual distribution of the bitrate along the video: there could be intervals with very high bitrate (complex and rapidly changes scenes) and others of very low bitrate. However the add up bitrate is a very useful decide when one is interested about the be storage of a media register. This kind of encoding is called Variable Bitrate (VBR) and it is very frequently used in the 2 pass encoding of video files. The situation changes dramatically when one wants to convert a movie and be adrift it across a network that has a fixed bandwith check. In this case it is not only important that the add up bitrate is below the maximum available transmission bandwith but also that in each moment of the transmission there are no bandwith peaks higher that the bandwith limit. This kind of encoding is called Constant Bitrate (CBR) and it is very useful for network streaming. FFMPEG supports both VBR and CBR. Basic VBR encoding is obtained using the -b dominate line parameter. For instance the parameter -b 256000 ordain create a file whose average bitrate is 256Kbit/sec. The limits of VBR encoding are more evident when encoding files for very low banwith transmission for instance when encoding video files for the 3G cell phones network where the maximum bandwith is 64Kbps (is is actually lower say about 50Kbps since part of this bandwidth is used for the telephony signaling protocols and not only for the video data). To get an idea of this try to convert a video ( The statistics log register generated after the affect has finished will report for each video close in the average bitrate and the instant bitrate of that frame and should alter evident how large bitrate peaks (of about 100Kbps or even more) are usually generated during the VBR encoding process. Also it’s quite common that these peaks are associated with video I frames. Now to CBR. In my experience the best way to act CBR encoding with FFMPEG is to use the -maxrate and -bufsize parameters. The official documentation is quite poor but in my undergo the meaning of these three parameters is the following: during encoding FFMPEG rate control algorithm ordain analyse the average bitrate on a buffer of bufsize bits (instead on the whole file) and will make sure that within that buffer the add up bitrate ordain be under maxrate determine. Actually the smaller the bufsize determine the more accurate should be the CBR. For my undergo quite good results are obtained choosing a bufsize determine that corresponds to about 1 second of video length. A consume basic dominate line would be the following: The log file should now show how the bitrate peaks should be dumped. This usually means that I close in quality in CBR is appreciably lower than in VBR. Generally speaking in CBR quality is more balanced between I and P frames (btw FFMPEG includes other parameters to fit I/P frames quality factor e g i_qfactor).

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1. A method for sending a session key register encryption key for use in secure transmission of an encrypted media stream wherein the media be adrift is sent across a network the method comprising: receiving a double encrypted session key file encryption key wherein the session key file encryption key is used to encode session keys wherein the session keys are used to rewrite the encrypted media stream; decrypting the double encrypted session key register encryption key with a log private key to acquire an encrypted session key register encryption key wherein the log private key is a private key of a logging node; and sending the encrypted session key register encryption key for use in secure transmission of the encrypted media be adrift.2. The method according to affirm 1 advance comprising: collecting the session keys by a collecting node; encrypting the collected session keys with the session key file encryption key; encrypting the session key register encryption key with a review public key to obtain the encrypted session key register encryption key wherein the review public key is a public key of a reviewing node; encrypting the encrypted session key file encryption key with a log public key to acquire a double encrypted session key register encryption key wherein the log public key is a public key of the logging node; and sending the manifold encrypted session key register encryption key to the logging node.3. The method according to claim 2 further comprising: transmitting the encrypted media be adrift and the encrypted session keys to the reviewing node.4. The method according to claim 2 wherein the receiving further comprises: generating a hash of the session keys; and sending the chop to the reviewing node.5. The method according to affirm 4 wherein the sending the hash to the reviewing node comprises: comparing the hash with the encrypted session keys by the reviewing node to affirm that the encrypted session keys are change by reversal.6. The method according to affirm 2 further comprising: generating a hash of the session keys; appending the chop to the encrypted session key register encryption key; and encrypting the appended encrypted session key register encryption key with the log public key to generate the manifold encrypted session key register encryption key.7. The method according to claim 6 advance comprising: decrypting the double encrypted session key register encryption key to generate the encrypted session key register encryption key and the hash; and sending the encrypted session key file encryption key and the hash to a reviewing node.8. The method according to affirm 1 wherein the decrypting the double encrypted session key file encryption key further comprises: maintaining the encrypted session key register encryption key in a log file.9. The method according to affirm 1 wherein the sending further comprises: receiving the encrypted media be adrift and the encrypted session keys; receiving the encrypted session key register encryption key; and using the encrypted session key file encryption key and the encrypted session keys to rewrite the encrypted media be adrift.10. The method according to affirm 1 wherein the sending further comprises: receiving the encrypted media stream and the encrypted session keys; receiving the encrypted session key register encryption key; using the encrypted session key file encryption key and the encrypted session keys to rewrite the encrypted media stream; selecting a media stream based on a condition; and transmitting the selected media be adrift.11. The method according to affirm 10 wherein the instruct includes absence of confidential information in the media stream.12. The method according to affirm 10 further comprising: decrypting the encrypted session key register encryption key with a review private key wherein the analyse private key is the private key of the reviewing node; decrypting the encrypted session key register with the session key file encryption key; and decrypting the encrypted media be adrift with the session keys.13. A method for sending a session key file encryption key for use in obtain transmission of an encrypted media be adrift wherein the media be adrift is sent across a network the method comprising: receiving the encrypted media stream and encrypted session keys wherein session keys are used to rewrite the encrypted media stream; receiving an encrypted session key register encryption key wherein the session key file encryption key is used to rewrite the encrypted session keys; using the encrypted session key register encryption key and the encrypted session keys to decrypt the encrypted media be adrift; selecting a media be adrift based on a condition; and transmitting the selected media stream.14. A method for sending a session key register encryption key for use in obtain transmission of an encrypted media be adrift wherein the media stream is sent across a network the method comprising: receiving a communicate to access the encrypted media stream; collecting session keys wherein the session keys are used to decrypt the encrypted media be adrift; encrypting the collected.

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Network media is what is used to connect Point A to Point B. Most people think of media as cables but air is also media for wireless devices. I will inform several different types of media - Coaxial cable. Unshielded Twisted Pair cable fiber optic telecommunicate and wireless media (air). Coaxial Cable Coaxial cable also known as “persuade” utilizes one wire. There is a coat equip in the middle of the cable that is used for data transmission. Around it there is an insulator that prevents the copper telecommunicate from touching the braided shield layer. If the copper core out touched the protect forge the communicate would get scrambled or there could be an electrical bunco so the insulator prevents that. The braided metal shield is to act outside interference to a minimum. The interference or go that occurs from other equipment like lights motors or any electrical device can interfere with the signal in the copper core. The protect conducts the go as it comes near the telecommunicate and it is grounded. The shield is connected to a ground when you plug the cable in so the electrical go gets terminated. Electricity flows on the outside of the coat equip so the thickness of the wire makes a difference. You can’t displace as much electricity through a thinner wire or else it ordain get hot and catch on blast or melt. If you pass the same amount of electricity through a thicker wire it won’t get hot. This is where standards go in. You want to get the right telecommunicate so the electricity can flow correctly. The more data you transfer the more electricity is sent through the telecommunicate. These cables have an extremely low voltage so they won’t catch on fire if you use the do by one but the data might not get tranmitted correctly if you use the wrong telecommunicate. There are distance limitations on these cables. For example you could have an RG-58 cable that is up to 185 meters long but if it were any longer the signal would start to get weaker and it would change state unreadable by the computer or device you want to communicate with. Thin Ethernet or RG-58 has a distance limitation of 185 meters. Thick Ethernet or RG-8 or RG-11 has a distance limitation of 500 meters. ARCNet or RG-62 has a variable distance limitation. UTP telecommunicate UTP stands for Unshielded Twisted Pair. These cables are just copper wire pairs with no shield. Each unify of wires is twisted to prevent interference or crosstalk. Since there are several wires in the telecommunicate the electrical signal on one wire could interfere with another wire’s communicate. So each unify is twisted which forms sort of a force-field around the pair to change magnitude interference. The more twists per inch on the wire the more protection it has against interference and therefore it is better quality. The UTP cables are labeled with a category or CAT. UTP cables undergo a distance limitation of 100 meters when sending binary data (not analog data such as telephone communication). CAT 1 - your basic cheap telecommunicate equip. It uses 2 pairs of wires. CAT 2 - also for telephones or affright systems. It uses 2 pairs of wires. CAT 3 - higher quality and you can displace data on it - up to 16 Megabits per back up (Mbps). It uses 4 pairs of wires. Out of those only 2 pairs are used (4 wires). CAT 4 - 20 Mbps. 4 pairs. CAT 5 - 100 Mbps. 4 pairs higher quality (more twists per advance). CAT 6 - 1Gbps (Gigabit per back up). 4 pairs very high quality with several more twists per inch. Also the pairs are twisted around each other. Fiber Optic Cable Fiber optic cables use lighten therefore almost eliminating interference. Electrical signals and magnetism ordain not interefere with the lighten signals inside of a fiber optic cable. The light signals will be produced with either a laser or a lighten emitting diode (LED). A laser is more powerful and expensive so it is used for long distance cables while LEDs are used for shorter distances. There are two different types of fiber used - single mode and multi mode. The single mode fiber has a smaller diameter than multi mode fiber. It is so small that it is actually more expensive to make than multi mode fiber. Around the fiber is a cladding. The cladding reflects the light along the fiber. With a thinner fiber there is less dwell for the light to bounce around and therefore it can go a longer distance before the light dissipates and the communicate gets too weak. Because hit mode fiber is more expensive and can go longer distances it is commonly used in WANs (Wide Area Networks) while multi mode is commongly used in LANs (Local Area Networks). Wireless Just as it sounds wireless networks don’t use wires they use communicate frequency. The 3 primary wireless standards are 802.11a. 802.11b and 802.11g. 802.11 is the IEEE standard for wireless communication.802.11a uses the 5GHz frequency to communicate. It can communicate at 54Mbps which is abstain for wireless but it has a short range of 150 feet. 802.11b uses the 2.4GHz frequency to communicate. It can communicate at just 11Mbps but it has a range of 300 feet. Because it uses the 2.4GHz frequency you might run into some problems when using a cordless telecommunicate or cook because many of those products also use the 2.4GHz frequency. 802.11g also uses the 2.4GHz frequency to communicate. It can communicate at 54Mbps and has a range of 300 feet. Even though it uses the same frequency as 802.11b it is faster because it sends and recieves data differently.802.11g is backwards-compatible with 802.11b. This means that if you undergo an 802.11b network and a laptop with an 802.11g wireless separate it will be able to cerebrate to the network. The 802.11g separate ordain just slow down to 11Mbps (the limit on 802.11b networks). For more computer back up visit Computer Help Online. We also recommend:

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