A remote wake-up technology that enables you to remotely power systems "on" for off-hours maintenance. A result of the Intel-IBM Advanced Manageability Alliance and part of the Wired for Management Baseline Specification, this technology helps save time on automated software installations, upgrades, disk backups and virus scans. Equally important, it increases end-user productivity by moving such planned disruptions to off-hours.
Fast Ethernet PC Multi-Port Card NIC and modem connections
Fast Ethernet Card Specs. The D-Link DMF-560TX is a 10/100Mb Dual Speed Ethernet PC Card with an integrated V.90/K56flex Data/Fax Modem. The DMF-560TX is targeted at notebook and laptop users that connect to a wide variety of data-communications devices and services, and require access to faster technologies. Laptop users are able to seamlessly connect to both Ethernet and Fast Ethernet LANs, as well as send and receive faxes, connect to the Internet, and dial into a Remote Access Server or PC using this one PCMCIA PC Card solution. The DMF-560TX strictly adheres to the IEEE Ethernet standards and the ITU Data Communications and Modem standards in order to ensure maximum interoperability. The DMF-560TX attempts to connect at the highest speed supported by an ISP, LAN, host modem, or fax machine and automatically defaults to a lower speed until a stable connection can be created.
Wireless PC Card Specs D-Link Air DWL-650 PC Card Type-II 11Mbps Wireless LAN Adapter The D-Link DWL-650 is an IEEE 802.11b compliant PC Card Type-II 11Mbps wireless LAN adapter. The DWL-650 will operate in 2.4 GHz Direct Sequence Spread Spectrum (DSSS) for wireless networks in the home or office environment. It is designed to operate in 3.3V or 5.0V DC slots. In addition, the DWL-650 uses a 64/128-bit WEP (Wired Equivalent Privacy) Encryption for a secure network connection. The D-Link DWL-650 can operate in either Ad-Hoc mode (Peer-to-Peer networking without access point) or Infrastructure mode (Peer-to-Peer networking using an access point). In Infrastructure mode, the DWL-650 can be connected to a broadband residential gateway or a DSL/Cable modem for high-speed wireless Internet access on the existing network.
Wireless PC Card Specs The DWL-650 can transmit data at 11, 5.5, 2 or 1 Mbps per channel. The DWL-650 transmit rate values can be manually selected for Auto Select 1 or 2 Mbps, Fixed 1 Mbps, Fixed 11 Mbps, Fixed 2 Mbps, Fixed 5.5 Mbps and Fully Auto. The DWL-650 has full mobility and seamless roaming from cell to cell as well as across access points. The range of coverage per cell for indoor use is up to 328 feet and up to 984 feet per cell for outdoor use. The DWL-650 comes with an internal non-detachable diversity patch antenna and one built-in green LED indicator for power, network link and activity. The DWL-650 is compatible with Windows 98, Windows ME, Windows 2000, Windows XP.
Wireless PCI Card Specs The D-Link Air DWL-520 is an IEEE 802.11b wireless PCI adapter. The DWL-520 provides an integrated PCI solution that will operate within the 2.4 GHz Direct Sequence Spread Spectrum (DSSS) for wireless networks in the home or office environment. Along with the advanced wireless technology that is incorporated into the DWL-520, wide range motherboard support is assured by compliance to the latest PCI 2.2 standard interface. The DWL-520 is the solution for users and network administrators looking for the convenience offered by a wireless connection.
The D-Link DWL-520 can operate in either Ad-Hoc mode (Peer-to-Peer networking without an access point) or Infrastructure mode (Peer-to-Peer networking using an access point). In Infrastructure mode, the DWL-520 can be connected to a wireless residential gateway with a broadband connection to enable wireless sharing of the High-speed Internet access.
The DWL-520 can transmit data at rates of 11Mpbs, 5.5Mbps, 2Mps and 1 Mbps per channel. With its detachable antenna using a reverse SMA connector, the DWL-520 has an effective range of up to 230 feet for indoor use and up to 984 feet in an outdoor environment. In addition, the DWL-520 supports 64/128-bit WEP (Wired Equivalent Privacy) Encryption for network security.
Next generation of wireless products with its high-performance D-Link Air Pro series of 5GHz networking technology.
Designed for indoor use, the D-Link Air Pro DWL-A650 is a powerful notebook PC CardBus adapter that allows users to have mobile access to networks. It provides roaming capabilities from cell to cell and network to network.
At 54 Megabits per second (Mbps), the D-Link Air Pro DWL-A650 5GHz high speed wireless CardBus adapter delivers the fastest standards-based wireless technology in the industry. With IEEE 802.11a standard compliance, the D-Link Air Pro DWL-A650 high-speed wireless adapter provides excellent network interoperability.
A proprietary “Turbo” mode allows the D-Link Air Pro DWL-A650 to operate at significantly greater data rates up to 72Mpbs. Eight non-overlapping channels create less interference, which supplies higher average cell throughput to clients. The D-Link Air Pro DWL-A650 employs enhanced 152-bit Wired Equivalent Privacy (WEP) and Dynamic Key Exchange to protect data from unauthorized access.
The D-Link Air Pro DWL-A650 is easily installed into a laptop PC to provide connectivity directly to another wireless enabled device (ad-hoc mode) or through an 802.11a based access point (infrastructure mode).
Common I/O Address Assginemnt (learnthat.com) Address (Hex) Device 00-0F DMA Controller 20-21 Interrupt Controller 40-43 Timer 1F0-1F8 Hard Disk Controller 200-20F Joystick Controller 238-23B Bus Mouse 278-27F LPT2 2E8-2EF COM4 Serial Port 2F8-2FF COM2 Serial Port 300-30F Ethernet Card 330-33F MIDI Port 378-37F LPT1 Port 3E8-3EF COM3 Serial Port 3F0-3F7 Floppy Disk Controller 3F8-3FF COM1 Serial Port
There is a 64K address space for I/O addresses, although typically less than 1K is used. Each board that uses an I/O address contains a few bytes of memory (16, 32, etc.) set to a default address range. One or more alternate addresses is also provided to resolve conflicts with other boards. These I/O spaces are a bunch of tiny memory banks scattered over different devices. As long as each one is set to a different address, the CPU can transmit signals to the appropriate boards without conflict. Following are the default I/O addresses for the serial and parallel ports in a PC.
I/O Address Continued ( www.techencylopedia.com )
An I/O address operation takes place as follows. If a program needs to send a byte to the serial port, it issues an OUT instruction to the CPU with the address of that serial port. The CPU notifies the address bus to activate the I/O space, not regular memory, and the address bus signals the appropriate byte location on the board. The CPU then sends the data character over the data bus to that memory location.
The Simple Network Management Protocol (SNMP) is an application-layer protocol designed to facilitate the exchange of management information between network devices.
By using SNMP-transported data (such as packets per second and network error rates), network administrators can more easily manage network performance, find and solve network problems, and plan for network growth.
SNMP is a relatively simple protocol, yet its feature set is sufficiently powerful to handle the difficult problems presented in trying to manage today's heterogeneous networks.
Today, SNMP is the most popular protocol for managing diverse commercial internetworks as well as those used in universities and research organizations.
SMP (symmetric multiprocessing) is the processing of program s by multiple processor s that share a common operating system and memory . In symmetric (or "tightly coupled") multiprocessing, the processors share memory and the I/O bus or data path. A single copy of the operating system is in charge of all the processors. SMP, also known as a "shared everything" system, does not usually exceed 16 processors.
SCSI, Small Computer Systems Interface, is widely used in mid- to high- performance workstations and servers.
SCSI offers faster transfer rates than ATA / IDE , the interface most commonly used in desktop PCs.
In general, ATA/IDE is considered easier to implement and less expensive than SCSI but does not offer as many features.
For example, SCSI can support up to 16 devices on a single bus (IDE offers two), generally offers faster throughput, uses less CPU horsepower during operation, and is therefore more efficient in demanding multiple initiator applications for multi-users and uses. This is significant because it allows the processor to perform more commands at one time making for greater efficiency.
SCSI Standards SCSI Fast SCSI Ultra SCSI Wide Ultra SCSI Ultra2 SCSI Wide Ultra2 SCSI Ultra3 SCSI Data transfer rates max. Bus speed (MB/sec) 5 10 20 40 40 80 160 Maximum Data Bus width (bits) 8-bit 8-bit 8-bit 16-bit 8-bit 16-bit 16-bit Max. cable length (meters) 6 3 1.5 - 3 1.5 - 3 12 12 12 Max. device support 8 8 8 - 4 8 - 4 8 16 16
The SCSI terms Fast, Ultra, or Ultra2 typically refer to data rate increases that move data faster on the bus, while the term Wide refers to adding more lanes to the bus, typically transferring 16 bits of data at one time rather than eight bits. Other differences between the standards include the maximum cable length and the number of devices that can exist on the same SCSI bus.
As one of the recent developments in SCSI, Ultra3 SCSI presents significant feature and benefit enhancements over Ultra2 SCSI products. Ultra3 SCSI products are designed to offer, at a minimum, the following features: Cyclic Redundancy Check (CRC) , domain validation , and double transition clocking , none of which are available in Ultra2 SCSI products.
These features are designed to improve speed, performance, and overall manageability of SCSI.
The subset of Ultra3 that includes the three features, Cyclic Redundancy Check (CRC) , domain validation , and double transition clocking , is commonly called Ultra160, for its speed 160MB per/sec. The main difference between Ultra3 and Ultra160 is that Ultra3 implementations may offer other features in addition to those listed above.
The term ATA stands for Advanced Technology Attachment , for the standard bus interface on the original IBM AT computer. This interface also is called IDE , for Integrated Drive Electronics; ATA is the official ANSI (American National Standard Institute) standard designation.
Also known as Ultra DMA , ATA is generally the least expensive hard drive interface; many computer motherboards include ATA controllers and cable connectors that typically control the "C" drive that contains the operating system. However, ATA is a slightly slower drive interface, so it is used primarily in single user computer applications or low-end RAID systems.
ATA Variations ATA/ ATA-2 Ultra-ATA/33 Ultra-ATA/66 Data transfer rates max. Bus speed (MB/sec) 8.3 16.6 33 66 Maximum Data Bus width (bits) 16-bit 16-bit 16-bit 16-bit Max. device support 2 2 2 2
Fiber Channel - Arbitrated Loop (FC-AL) is an exceptionally high-bandwidth industry-standard interface primarily targeted toward high-end servers and similar demanding applications.
FC-AL uses fiber optic cabling in a loop configuration to produce maximum transfer speeds of 100 MB/second and is designed to connect up to 127 devices as far as 10 kilometers apart, enabling data storage in remote, secure locations distant from the server.
FC-AL devices can be dual ported, providing two simultaneous input/output sessions that doubles maximum throughput, and FC-AL enables "hot swapping," so you can add and remove hard drives without interrupting system operation, an important option in server environments.
FC-AL adapters tend to cost more than SCSI adapters.
Gateways are used for interconnecting vastly differing computing environments together
SNA Gateway SNA Gateway WS WS Mainframe LAN - Ethernet IBM - SNA FEP NIC Card Gateway software Gateway Interface Card
Gateway’s Functional Relationship to the ISO-OSI Model Application Presentation Session Transport Network Data Link Physical Gateway Application Presentation Session Transport Network Data Link Physical