Aug 04

1000BASE-SX: A short laser wavelength on multimode fiber optic cable for a maximum length of 2 kilometers.

1000BASE-LX: A long wavelength for a “long haul” fiber optic cable for a maximum length of 10 kilometers.

100BASE-FX: 100Mbps Ethernet implementation over fiber.

100BASE-TX: 100Mbps Ethernet implementation over Category 5 and Type 1 Twisted Pair cabling.

10BASE-T: The IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP) cabling.

aging: The automatic removal of dynamic entries from the Switch Database which have timed-out and are no longer valid.

ATM: Asynchronous Transfer Mode. A connection oriented transmission protocol based on fixed length cells (packets). ATM is designed to carry a complete range of user traffic, including voice, data and video signals.

auto-negotiation: A feature on a port which allows it to advertise its capabilities for speed, duplex and flow control. When connected to an end station that also supports auto-negotiation, the link can self-detect its optimum operating setup.

backbone port: A port which does not learn device addresses, and which receives all frames with an unknown address. Backbone ports are normally used to connect the Switch to the backbone of your network. Note that backbone ports were formerly known as designated downlink ports.

backbone: The part of a network used as the primary path for transporting traffic between network segments.

bandwidth: Information capacity, measured in bits per second that a channel can transmit. The bandwidth of Ethernet is 10Mbps, the bandwidth of Fast Ethernet is 100Mbps.

baud rate: The switching speed of a line. Also known as line speed between network segments.

BOOTP: The BOOTP protocol allows automatic mapping of an IP address to a given MAC address each time a device is started. In addition, the protocol can assign the subnet mask and default gateway to a device.

bridge: A device that interconnects local or remote networks no matter what higher level protocols are involved. Bridges form a single logical network, centralizing network administration.

broadcast: A message sent to all destination devices on the network.

broadcast storm: Multiple simultaneous broadcasts that typically absorb available network bandwidth and can cause network failure.

console port: The port on the Switch accepting a terminal or modem connector. It changes the parallel arrangement of data within computers to the serial form used on data transmission links. This port is most often used for dedicated local management.

CSMA/CD: Channel access method used by Ethernet and IEEE 802.3 standards in which devices transmit only after finding the data channel clear for some period of time. When two devices transmit simultaneously, a collision occurs and the colliding devices delay their retransmissions for a random amount of time.

data center switching: The point of aggregation within a corporate network where a switch provides high-performance access to server farms, a high-speed backbone connection and a control point for network management and security.

Ethernet: A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation. Ethernet networks operate at 10Mbps using CSMA/CD to run over cabling.

Fast Ethernet: 100Mbps technology based on the CSMA/CD network access method.

Flow Control: (IEEE 802.3X) A means of holding packets back at the transmit port of the connected end station. Prevents packet loss at a congested switch port.

forwarding: The process of sending a packet toward its destination by an internetworking device.

full duplex: A system that allows packets to be transmitted and received at the same time and, in effect, doubles the potential throughput of a link.

half duplex: A system that allows packets to be transmitted and received, but not at the same time. Contrast with full duplex.

IP address: Internet Protocol address. A unique identifier for a device attached to a network using TCP/IP. The address is written as four octets separated with full-stops (periods), and is made up of a network section, an optional subnet section and a host section.

IPX: Internetwork Packet Exchange. A protocol allowing communication in a NetWare network.

LAN – Local Area Network: A network of connected computing resources (such as PCs, printers, servers) covering a relatively small geographic area (usually not larger than a floor or building). Characterized by high data rates and low error rates.

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Jan 27

WISH is short for Wireless Intelligent Stream Handling, a technology developed to enhance your experience, when using a wireless network(such as D-Link DIR-655), by prioritizing the traffic of different applications.


Step 1: Open your web browser and type in the IP address of the router ( by default).

Step 2: Enter the username (admin) and password (blank by default), and then click Log In.

Step 3: Click Advanced from the top and select WISH, from the left side.

Step 4: Check the box next to Enable WISH.

Step 5: After WISH is enabled, you can configure it, using the Priority Classifiers and WISH Rules.

WISH Rules

A WISH Rule identifies a specific data flow and assigns a priority to that flow. For most applications, the priority classifiers ensure the right priorities and specific WISH Rules are not required.
WISH supports overlaps between rules. If more than one rule matches for a specific data flow, the rule with the highest priority will be used.


Create a name for the rule that is meaningful to you. Also, ensure that you apply a check mark to the rule.
These check marks tell the router the rule is active.


The priority of the data flow is entered here. Four priorities are defined:

•BK: Background (least urgent).

•BE: Best Effort.

•VI: Video.

•VO: Voice (most urgent).



The protocol used by the data.


Host 1 IP Range
The rule applies to a flow of data for which one computer´s IP address falls within the range set here.


Host 1 Port Range
The rule applies to a flow of data for which host 1´s port number is within the range set here.


Host 2 IP Range
The rule applies to a flow of data for which the other computer´s IP address falls within the range set here.


Host 2 Port Range
The rule applies to a flow of data for which host 2´s port number is within the range set here.


More Information welcome to visit Http://

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Aug 11

PPPoE stands for Point-to-Point Protocol over Ethernet. It is a non-standard method of connecting to your ISP to gain an IP address. It relies upon a software client that is provided by the ISP. An IP address is required to gain a connection to the Internet.It is used mainly with DSL services where individual users connect to the DSL modem over Ethernet and in plain Metro Ethernet networks. It was developed by UUNET, Redback Networks and RouterWare and is available as an informational RFC 2516.

Ethernet networks are packet-based and have no concept of a connection or circuit and also lack basic security features to protect against IP and MAC conflicts and rogue DHCP servers. By using PPPoE, users can virtually “dial” from one machine to another over an Ethernet network, establish a point to point connection between them and then securely transport data packets over the connection. It is mainly used by telephone companies, since PPPoE is easily integrated with the current dial-up AAA systems and fits perfectly into the current ATM backbones. The protocol also permits very easy unbundling of DSLAMs where required by regulators, since the user would simply use a different login into PPP, then the ATM circuit would be routed to the user’s ISP. Also pre-paid traffic bucket business models can be created with PPPoE more easily than with DHCP or multiplexing multiple users with different speed tiers or QoS through 1 DSL modem or by creating a different login for each static IP purchased by customers.

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