|
|
POP3
Short for Post Office Protocol version 3. It is used to retrieve emails from
remote servers to a local client over a TCP/IP connection.
The earlier versions of the POP protocol, POP (informally called POP1) and
POP2, have been thoroughly obsoleted by POP3. In contemporary usage, the
less precise term "POP" almost always means "POP3" in the context of email
protocols.
POP3 and its predecessors are designed to allow users with intermittent
connections such as dial-up connections to download email when connected,
while the SMTP protocol was designed to allow systems with permanent
connections to receive email. POP3 is a pull protocol (where the client
requests data from the server), whereas SMTP is a push protocol where the
client sends data to the server without the server requesting the data in
advance.
POP3 also supports several authentication methods to provide varying levels
of protection against illegitimate access to a user's email. It is also
possible to encrypt POP3 traffic using SSL.
POP3 works over a TCP/IP connection using port 110.
Other email protocols include SMTP and IMAP.
POP3 RFCs
* RFC 1939 "Post Office Protocol - Version 3"
* RFC 2449 "POP3 Extension Mechanism"
* RFC 1734 "POP3 AUTHentication command"
* RFC 2222 "Simple Authentication and Security Layer (SASL)"
* RFC 3206 "The SYS and AUTH POP Response Codes"
This content from Wikipedia is licensed under the GNU Free Documentation License.
|
3-in-2 Removable SATA Backplane Internal DriveCase3-in-2 Removable SATA Backplane Internal DriveCase ** 3-in-2 Removable SATA Backplane Internal Drive Case **This 3-in-2 Removable Internal Drive Case can accomodate three high performance SATA 3.5-inch hard drives, while occupying only two 5.25-inch drive bays! It's constructed of aluminum, has a cooling fan for effective airflow ventilation and supports up to 150 Mbps data transfer rates. This SNT-2131-SATA hard drive case is a reliable and economic solution on RAID 0,1,5! Order yours today! General Features:- Aluminum Frame, Aluminum Cover - Interface: Serial ATA 1.0 - High performance transfer rate: Up to 150 MB/sec. - Form Factor: 2 Bay for 3 HDD (1") - Support RAID 0, 1, 5 functions - Plug and Play , Hot Swappable - Point to point, free from master/slave setting - SATA 15-pin & 4 pin power connectors - LED for P/S, Fan Sensor & Buzzer - Power Control Switch - Reset Switch for buzzer alarm - 8cm Fan Dimensions: - 8" x 5.75" x 3.5" (L x W x H, approximate) Regulatory Approvals: - CE Retail Package Includes: - 3-in-2 Removable SATA Backplane Internal Drive Case - User's Manual Notes: - Model: SNT-2131-SATA Compatibility/Requirements/Disclosures: ** Requirements *** Available Two (2) 5.25-inch drive bays * 3.5-inch SATA Hard Drives * Available 4-pin power connector More ...
HP Photosmart 433 3.1MP 3x Digital Zoom CameraHP Photosmart 433 3.1MP 3x Digital Zoom Camera ** HP Photosmart 433 Digital Camera **This HP Photosmart 433 Digital Camera includes an assortment of great features to enhance your digital photography experience! You'll get brilliant results with 3.1 MegaPixels effective resolution, and its built-in 3x digital zoom. With Instant HP Share, simply connect the camera to your PC or printer to email or print your photos so they can be shared with family and friends. This Photosmart 433 offers a built-in flash, 16 MB of internal memory and a Secure Digital memory expansion slot (with a 32 MB SD card included). Take great photos, as well as record digital video, with this fantastic HP Photosmart 433 digital camera. Order yours today!General Features:- 3.1 MegaPixel effective resolution- 3.3 MegaPixel total resoution- 1/2.7-inch, 4:3 format CCD sensor- 30-bit color depth- 1.5-inch color LCD display- 3.27 MP (2096 x 1560) total pixel count resolution (still pictures)- 3.14 MP (2048 x 1536) effective pixel count resolution (still pictures)- 320 x 240 pixels for video clips- Audio captured automatically with video- Optical viewfinder, no diopter adjustment- 1/1000 to 4 seconds shutter speeds- Auto focus settings- Auto white balance- ISO 100/200/400 equivalent- JPEG(EXIF), MPEG1 compression format- Built-in flash- 10-second delay self timer- 16 MB built-in memory- Secure Digital memory slot (card not included)- Automatic white blance- Powered by two (2) AA batteries- USB interfaceFlash Features:- Automatic- Red-eye- Fill-in- Flash On- Flash Off- Night- 2.5 m (9. 8-inch) flash rangeLens Specifications:- 3x digital zoom- f/4.0 and f/8.0- 5.67 mm fixed focal length, 35 mm equivalent(approximately 36 mm)- Fixed focus control range of 0.85 m (33.5 inches) to infinityUnit Dimensions:- 2.3 x 4.5 x 1.5-inches (H x W x D)- 180 g (5.8 oz without batteries)Regulatory Approvals:- FCC- CE- UL- MIC- TUV/GS- Gost-R- C-TickRetail Package Includes:- Hewlett Packard Photosmart 433 digital camera- 32 MB SD card- HP Photo & Imaging Software- User Manual- USB cable- USB direct print cable- Wrist Strap- Dock insert only- Two (2) AA batteriesNotes:- Product number: Q3736A- UPC: 8 08736 73601 5 Compatibility/Requirements/Disclosures:** Requirements *** PC Requirements:* Pentium II or better CPU* Windows 98/ME/2000/XP* 64 MB RAM* 175 MB available hard drive space* 800 x 600, 16-bit color monitor* CD-ROM Drive* Available USB port* Macintosh Requirements:* 233 MHz Power PC or higher* Mac OS 9.1 or OS X 10.1.5 or higher* 64 MB RAM (128 MB recommended)* 175 MB available hard drive space* CD-ROM Drive* Available USB port More ...
2.2GB USB 2.0 Pen Drive (Silver)2.2GB USB 2.0 Pen Drive (Silver) ** 2.2 GB USB 2.0 Pen Drive **This pen drive is the perfect external large capacity drive for your PC or notebook. It features 2.2 GB capacity, USB 2.0 interface, and comes in a silver design. Its mini size provides super storage anywhere! General Features:- Silver pen drive- 2.2 GB capacity- USB 2.0 interface w/rotating USB connector- 3.1 Mbytes/sec average write rate- 4.2 Mbytes/sec average read rate- Lightweight and compact design - Windows and Macintosh compatibleUnit Dimensions:- 0.5 x 2 x 2.75-inches (H x W x D)Retail Package Includes:- 2.2 GB USB 2.0 Pen Drive- Manual- Drive CD (3-inch type)- Case Compatibility/Requirements/Disclosures: ** Requirements *** PC Requirements:* Windows 98SE/ME/2000/XP* Available USB port* CD-ROM drive* Macintosh Requirements:* Mac OS 8.6 or higher* Available USB port* CD-ROM drive More ...
HP LaserJet 4100 Laser PrinterHP LaserJet 4100 Laser Printer ** HP LaserJet 4100 Laser Printer **Quick and easy to install, the LaserJet 4100 series provides fast, high-quality printing with ProRes 1200 and FastRes 1200 settings for outstanding graphics. The printer features an Embedded Web server for online supply management, an internal Jetdirect print server, and an expandable design for increased printing flexibility, memory, and paper-handling capacity.General Features:- Instant-on fuser prints the first page in 12 seconds. - Prints letter-size paper at 25 pages per minute (ppm) or A4-size paper at 24 ppm. - FastRes 1200: produces 1200-dpi print quality for fast, high-quality printing of business text and graphics - ProRes 1200: produces 1200-dpi printing for best quality of graphic images- Print Speed Black: 25 ppm - Print Resolution, Black: 1200 dpi - Duty Cycle, Pages Per Month: 150,000- Input Capacity, Max.: 1,600 sheets Notes:- Refurbished printers do not include printing supplies. (IE: toner, ink, cables) More ...
Mobile USB FlyFan w/Flexible NeckMobile USB FlyFan w/Flexible Neck ** Mobile USB FlyFan with Flexible Neck **Get a strong, steady stream of cool air directedwhere you want it with the FlyFan. Notebook userscan stay comfortable on airplanes, trains, cars,and working in temperature controlled officeswith this small, personal, easy to use fan. Simplyplug into a USB port and feel a cool, fresh breeze!General Features:- USB interface- Soft Nylon Blades- Direct Airflow with Flexible Neck- Easy to Use- FlyFan 3.3 ~ 5V motorRetail Blister Pack Includes:- FlyFan Mobile USB Fan Compatibility/Requirements/Disclosures:** Requirements *** Available USB port More ...
XBOX Integrated Command CenterXBOX Integrated Command Center ** XBOX Integrated Command Center **No more switching cables to change between systems! With this XBOX integrated command center you cancombine 5 accessories into 1! Connect up to 4A/V components such as Games, SAT, TV, Receiverand DVD/CD. An 8 device remote control is includeso you can control XBOX and DVD functions! Orderyours today!General Features:- For use with XBOX Game Console- Combines Five (5) accessories into One (1)- Horizontal stand- S-AV/RF switcher- Connects up to Four (4) A/V components- 8 Device Universal Remote ControlFront Panel Features:- Remote Dock- Audio in- Headphone in- AV select- Power button- Game Storage (holds up to 8 games)Rear Panel Features:- Four (4) S-A/V Inputs - S-A/V output to TV - RF (coaxial cable) out to TV - RF (coaxial cable) in from antenna or cable - A/C adapter input - Audio out for stereo or speakers - Channel 3 or 4 swtich Regulatory Approvals: - FCC Retail Box Includes:- Integrated Command Center for XBOX- Remote Control- Installation Guide- AC Adapter (120V AC 60Hz)Notes:- Model: GXBICCX- UPC: 0 26616 06586 8 Compatibility/Requirements/Disclosures:** Requirements *** XBOX Game Console* Two (2) AAA batteries (for remote)* Available Power Outlet More ...
|
