Backwards Compatible
Backwards Compatible
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 CECHA01 CECHE01 backwards Compatible PS3 Playstation 3 YLOD See description  US $5.50
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 Sony PlayStation 3 80 GB Piano Black Console CECH E01 Backwards Compatible US $199.99
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 PlayStation 3 PS3 60GB CECHA01 Backwards Compatible YLOD US $1.25
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 PlayStation 3 PS3 60GB CECHA01 Backwards Compatible w 18 Games US $116.50
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 Sony PlayStation 3 150GB 60GB SKU CONSOLE PS2 BACKWARDS COMPATIBLE CECHA01 US $299.00
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 SONY PS3 250GB HDD SYSTEM Model CECH 2004B US $76.00
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 SONY PLAYSTATION 3 CONSOLE SYSTEM BACKWARDS COMPATIBLE PIANO BLACK FATBOY 80 Gb US $249.00
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 PlayStation 3 80 GB Backwards Compatible Console NTSC Software 341 US $83.00
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 Sony PlayStation 3 20 GB CECHB01 Firmware 350 Backwards Compatible PS3 EXTRAS US $177.50
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 PS3 80GB Backward compatible With two wireless controllers and games US $290.00
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 SONY PS3 SYSTEM 60GB BACKWARDS COMPATIBLE SYSTEM BUNDLE WITH 3 GAMES US $101.10
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 PS3 PLAYSTATION 3 SYSTEM CONSOLE 320GB BACKWARDS COMPATIBLE CECHE01 EXTRAS US $202.50
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 Sony PlayStation 3 160GB Video Game System PS3 complete entertainment bundle New US $279.00
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 Sony PlayStation 3 20 GB Piano Black Console W 2 Controllers and 1 Game US $105.00
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 Used Backwards Compatible PS3 CECH B01 US $88.00
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 Broken YLOD PlayStation 3 PS3 60GB Backwards Compatible CECHA01 US $50.00
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 Sony PlayStation 3 CECHE01 80GB Backwards Compatable PS1 PS2 PS3 US ONLY US $290.00
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 Sony PlayStation 3 60 GB Piano Black ConsoleNTSC350 OFW SUPER CLEAN US $192.50
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 SONY PS3 CONSOLECECHA0160GBBACKWARDSWORKINGVERY NICE US $180.00
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 PS3 Sony PlayStation 3 60 GB Piano Black Console w 4 Games Backward Compatible US $242.00
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 NINTENDO Wii CONSOLE HDGAMEFIT PLUS SUPER MARIO BROS MARIO KART BUNTLE US $599.01
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 Nintendo Game Boy Advance Glacier with one game GT Advance US $50.00
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 Nintendo Game Boy Advance Jasco Special Edition Glacier Handheld System Bundle US $43.99
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 Nintendo Game Boy Advance Blue Handheld System 2000 AGB 001 Works Great US $12.50
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 Nintendo Game Boy Advance Purple Handheld System US $44.99
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 Nintendo Game Boy Advance Jasco Special Edition Glacier Handheld System US $39.99
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 Nintendo Game Boy Advance Jasco Special Edition Glacier Handheld System AGB 001 US $.99
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 Sony PlayStation 3 60 GB Piano Black Console NTSC US $86.00
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 Sony PlayStation 3 80 GB Piano Black Console NTSC CECH E01 US $3.19
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 Nintendo Game Boy Advance SP Black Game System Bundle Charger Games Case US $52.99
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 Playstation 3 PS3 80GB CECHE01 back compat For parts Overheats after 2 hours US $10.00
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 Sony Playstation 3 250GB Video Game System Slim PS3 US $51.01
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 Nintendo Game Boy Advance SP Cobalt Game System Bundle Charger Games Case US $52.99
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 Nintendo Game Boy Advance SP Silver Game System Bundle Charger Games Case US $55.50
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 Sony Playstation 3 120GB Video Game System Slim PS3 US $20.50
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 Nintendo Game Boy Advance SP Cobalt Handheld Bundle With Games Plus Charger Look US $50.00
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 Nintendo Game Boy Advance SP Light Blue AGS 101 US $27.52
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 Sony PlayStation 3 80 GB Piano Black Console NTSC CECH E01 w OFW 341 US $180.00
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 Sony PlayStation 3 Slim Latest Model 160 GB W EXTRAS US $499.95
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 NES Nintendo Top Loader Bundle System Gun Hookups Controllers 9 games US $90.99
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 SONY PLAYSTATION 3 CONSOLE SYSTEM PIANO BLACK FATBOY 40 Gb US $174.00
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 ★BRAND NEW★ RED NINTENDO Wii w New Super Mario Bros US $324.99
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 ★NEW★ NINTENDO Wii Console w Wii Sports And Wii Resort US $299.99
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 Atari 7800 Black Console NTSC with 12 Game Bundle US $62.99
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 Nintendo Game Boy Advance SP Silver Handheld US $10.00
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 SONY PLAYSTATION 3 PS3 UPGRADED 320GB WD SCORPIO HARDDRIVE PIANO BLACK MINT US $250.00
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 Sony PlayStation 3 80 GB Piano Black Console NTSC CECH A01 US $70.00
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 Sony PlayStation 3 60 GB Piano Black Console And Move US $90.00
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 Nintendo Game Boy Advance Special Edition Glacier Handheld System US $15.50
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 Game Boy Advance SP bundle Silver 4 games wall charger AGS 001 Nintendo US $25.49
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 Nintendo Game Boy Advance SP Silver w Charger US $20.00
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 Rare Sony Playstation 3 Backwards Compatible With Extras US $86.00
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 lot Nintendo video games metroid pro am racing pinball quest mousecapade games US $14.99
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 Nintendo Game Boy Advance SP Blue AG5 001 etc US $14.23
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 Sony Playstation 3 160GB Video Game System Slim PS3 US $61.00
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 Playstation 3 Game Console with 14 games US $225.00
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 Nintendo NES 101 White Console TOP Loader System Games TESTED US $53.00
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 Sony PlayStation 3 320GB Video Game System US $56.55
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 2 Nintendo GAME BOY SYSTEMSGB ADVANCEAGB 001GB COLORCGB 0013 GAMESHDPHONES US $19.95
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 Atari 7800 ProSystem Video Game System COMPLETE 2 Controllers 13 Games US $26.00
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 Nintendo Game Boy Advance Blue Handheld System w 14 Games Lots of Extras US $24.99
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 Custom Sony PlayStation 3 PS3 80 GB Backwards Compatible in Midnight Blue US $275.00
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 Sony PS3 60 GB Console RARE Backward compatable FAT CECH A01 plays PS1 2 3 games US $202.50
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 Sony PlayStation 3 80 GB Piano Black Console NTSC CECH K01 US $100.00
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 Sony PlayStation 3 80 GB Black Console NTSC BACKWARDS COMPATIBLE Adult Owned US $199.99
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 Nintendo Game Boy Advance Purple Handheld System tested and works US $9.99
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 Purple GameBoy Advance with Light and 6 Games including Zelda Metroid US $25.00
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 Nintendo Game Boy Advance Glacier Handheld System w special back by Pelican US $19.99
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 Nintendo Game Boy Advance Glacier w Dragonball Z Legacy of Goku US $9.00
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 GameBoy Advance SP GBA SILVER AGS 001 Brightness Adjust 6 GAMES Bundle CASE NR US $10.50
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 Atari 7800 Atari 2600 35 Games 4 Joysticks 6 Paddles US $65.00
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 SUPER NICE Nintendo Wii Complete System White Console RVL 001 FREE SHIPPING US $51.00
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 Atari 7800 Black Console NTSC US $20.50
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 game boy advance purple system tested works US $17.99
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 game boy advance glacier system tested works US $17.99
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 Nintendo NES 101 White Console NTSC US $22.50
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 Nintendo Game Boy Advance SP Red Glacier Cables Cases DS Lot 7 Parts Only US $6.50
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 Nintendo Game Boy Advance SP US $17.72
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 Nintendo Game Boy Advance Glacier IN ROUGH SHAPE US $.99
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 Nintendo NES Top Loader Console Plus Dogbone Special Offer on Games US $46.00
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 Nintendo Gameboy Advance SP Lot 15 Units Blue Pink Cables Games Accessories US $56.55
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Google suggests TCP tweaks to make web pages load faster (Engadget)
Google has already proven it can load web pages as fast as lightning and
flying potatoes, but its "Make the Web Faster" team has grander designs. The
speed junkies want to quicken the internet by reworking Transmission Control
Protocol (TCP), a key communications method that helps keep the internet
working. Google says that it can reduce latency and speed things up by
increasing the amount of data that initiates a TCP connection, reducing the
initial timeout from three to one seconds, consolidating packets using its new
TCP Fast Open protocol and adopting a better algorithm for managing network
congestion. These changes are backwards-compatible and open source, but sadly
don't include any way to speed up internet standards ratification and
deployment, so ironically this might take a while.
Google suggests TCP tweaks to make web pages load faster originally appeared
on Engadget on Tue, 24 Jan 2012 20:49:00 EDT. Please see our terms for use of
feeds.
######
Permalink PCWorld | Google Code blog | Email this | Comments
Pokemon White on the Nintendo 3DS (Backwards Compatibility Test)
Network Time: NTP Server Systems by David Evans
The Network Time Protocol, more commonly known as NTP, is a widely used Internet protocol for the transfer of time across a network. NTP is commonly used to synchronise network time clients to an accurate time source.
This article describes the Network Time Protocol and provides an overview of how NTP servers utilise NTP to provide an accurate source of time to network time clients.
A Brief History
The NTP protocol is one of the oldest Internet protocols still in use today. It has been in continuous use for more than 25 years. The protocol was originally designed to synchronise computers and time critical processes across the Internet. Initially developed for the Linux operating system, the protocol has recently been partly ported to the Microsoft Windows operating system. NTP is installed by default in many Linux Unix and Free BSD distributions. Most NTP server systems utilise the Linux operating system due to its specialised kernel timing algorithms.
About the Protocol
NTP is a client-server based protocol. The NTP protocol provides clients with 3 fundamental products: system clock offset, round-trip delay and time dispersion of a specified external reference clock (such as GPS). The clock offset specifies the difference between the local system time and an external reference clock. Round-trip delay measures the network latencies experienced during the transfer of packets of information. Time dispersion specifies the maximum error associated with timing information received from the external reference clock.
The NTP protocol has a hierarchical structure. A stratum 1 time server is the primary reference server and sits at the top of the heirachy. The primary reference server it is followed by secondary reference servers and clients. A radio or GPS external time reference is generally used to synchronise a stratum 1 NTP Server. At the highest level a primary reference NTP server has a stratum of one. Each lower-level NTP server and client is attributed a stratum one greater than the previous level. As the stratum increases, accuracy decreases due to inconsistencies in network path timing.
Network Time Protocol uses the UDP protocol which is an integral part of the TCP/IP protocol suite. Each NTP message consists of a number of fields: Leap Indicator; Version Number; Mode; Stratum; Poll; Precision; Root Delay; Root Dispersion; Reference Identifier; Reference Timestamp; Originate Timestamp; Receive Timestamp; Transmit Timestamp; Key Identifier and Message Digest. The fields are used to identify messages and provide time stamp and round-trip delay information.
The current release of NTP is version 4. All versions of the protocol are backwards compatible with previous versions. The only significant modification to the protocol between versions 3 and 4 is a slight header re-interpretation to accommodate IPv6.
NTP Server Modes of Operation
A stratum 1 NTP server has three modes of operation: unicast; anycast and multicast. The client initiates the unicast and anycast modes, the server responds with a NTP time message that the client uses for synchronisation. Multicast is a broadcast mode of operation, at periodic intervals time messages are broadcast to the entire sub-domain.
Accurate External Reference Clocks
The standard NTP distribution can operate with a number of external time references, or 'reference clocks'. The Global Positioning System (GPS) is a popular choice since it provides a global precise time reference. A number of national time and frequency radio broadcasts are also available, such as WWVB (US), DCF-77 (Germany) and MSF (UK).
The Simple Network Time Protocol (SNTP)
SNTP is a simplified version of the full-blown Network Time Protocol. SNTP is generally used where the complexities and high accuracy of the NTP protocol is not required. The SNTP protocol is often used by micro-controllers and SBC computers. The SNTP and NTP protocols are fully interchangeable. Any SNTP client can synchronise with a full-blown NTP server.
Dave Evans is a technical author specialising in computer network timing technology and NTP server systems. Dave provides a technical authoring service for many computer timing system manufacturers. Click here to find out more about GPS NTP server systems.
Article Source: http://www.earticlesonline.com/Article/Network-Time--NTP-Server-Systems/142775
