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Monday, 19 January 2009
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Posted by j-anncamacho at 5:53 AM EST
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hUb
A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

A passive hub serves simply as a conduit for the data, enabling it to go from one device (or segment) to another. So-called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub. Intelligent hubs are also called manageable hubs.

A third type of hub, called a switching hub, actually reads the destination address of each packet and then forwards the packet to the correct port.

 

 

 

 

 

 

Hub Properties

dc++07.png
  1. Enter the name of the hub(SHNshare.org).
  2. Enter the address to connect to(www.shnshare.org).
  3. Enter a description for your reference.
  4. Leave the other Identification fields blank to use your default settings.
  5. Click OK to apply the changes.

 

Using the hub

dc++09.png
  1. Once you have successfully entered the hub you will recieve a welcome message from Oversoul(BOT/Hub Security).
  2. The left panel is a main chat sort of like IRC.
  3. The right panel contains all users currently connected to the hub.
  4. The bottom panel displays your current transfers in progress.

Hubs are supplied to residence halls where only one network connection exists in a double-occupancy room.  These buildings include Heitz, College, Delta Tau Delta, and Pi Kappa Phi.  this document will help you connect your hub properly, and use two computers on a single connection.

Hubs will be distributed to the rooms in the residence halls listed above. Residents in Heitz Hall should leave their hub in the room.  Other locations can return the hub to the Technology HelpDesk located in the Cullom-Davis Library.   Your hub should include the following items:

  • Hub - this is a small box used to connect two computers
  • Power Supply - the hub requires power to operate
  • Ethernet Cable - a short cable connects the hub to the wall network jack (you will need to supply an Ethernet cable to hook your computer up to the hub)

Connecting the Hub:

network connect    

 

 

 

 

 

 

 

 

Be sure to locate the hub near the network connection, as well a snear an AC power outlet.  Connect the power cord to the hub and plug it into the AC wall receptable.  See that the green Power light is illuminated. Take the short Ethernet cable that came with the hub and connect it to the Daisy Chain jack on the hub. Connect the other end to the Network Jack on the wall. Be sure to remove any previous connections to that jack. See that the green Link light on number 5 illuminates. Do not connect anything to the jack marked 5. This jack may be blocked by an empty plug. You must not have the jacks marked 5 and Daisy Chain connected simultaneously.

Connect your computers Ethernet cables to any of the jacks marked 1 to 4. It doesn’t matter which jack, but you should see a green Link light on the hub at the connection when the computer is on. Do not use a Cross-Over cable. The Ethernet cable should be a standard straight-through Ethernet cable rated at Category 5. This is also called a Cat-5 Ethernet cable. See the document How to Connect Your Personal Computer to the Dorm Network for more information.

 

 

 


Posted by j-anncamacho at 4:45 AM EST
Updated: Monday, 19 January 2009 5:10 AM EST
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rOutEr

A router (pronounced /'rautər/ in the USA and Canada, pronounced /'ru:tər/ in the UK and Ireland, or either pronunciation in Australia) is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information. For example, on the Internet, information is directed to various paths by routers.

 

 

 

 

 

A router is defined as a device that selects the best path for a data packet to be sent from one computer network to another. A router is located at any gateway (where one network meets another), and is often included as part of a network switch.

How routers work

Electronic messages sent between computer networks are stored in the router, while it determines all of the possible paths to the destination address. The router then chooses the most expedient route, based on its investigations into the traffic load, distance, number of network points that the packet has to pass through, and cost algorythms between computer networks, before forwarding the packet to the final destination.

Router hardware is a physical device which connects the local area network to the wide area network, it is responsible for routing network traffic from source to destination. These routers run on layer routing protocols and operate on network layer information.

Router Software

Router softwares are used to determine the packet point to point switching, software routers contain a header and a footer and are used to determine each path on the LAN which is taken.

 

The Function of an Internet Router

All of these networks rely on NAPs, backbones and routers to talk to each other. What is incredible about this process is that a message can leave one computer and travel halfway across the world through several different networks and arrive at another computer in a fraction of a second!

The routers determine where to send information from one computer to another. Routers are specialized computers that send your messages and those of every other Internet user speeding to their destinations along thousands of pathways. A router has two separate, but related, jobs:

  • It ensures that information doesn't go where it's not needed. This is crucial for keeping large volumes of data from clogging the connections of "innocent bystanders."
  • It makes sure that information does make it to the intended destination.

In performing these two jobs, a router is extremely useful in dealing with two separate computer networks. It joins the two networks, passing information from one to the other. It also protects the networks from one another, preventing the traffic on one from unnecessarily spilling over to the other. Regardless of how many networks are attached, the basic operation and function of the router remains the same. Since the Internet is one huge network made up of tens of thousands of smaller networks, its use of routers is an absolute necessity. For more information, read How Routers Work.

 

Purpose and motivation

The intention with this project is to study the functions, architectures and implementations of network nodes. The rapid increase in optical link capacity causes routers in today's communication networks to be bottlenecks. Also, networks are integrating different types of services, such as voice, video, VPN, VLAN, and ordinary best-effort data traffic. This puts high demands on the router's ability to classify and modify the traffic. Other problems for router designers are the rapidly increasing size of routing tables and the need to support new and enhanced network protocols. Thus, the sheer scaling of the Internet with respect to service offering, address space and traffic volumes is enough to motive the research on faster and flexible router architectures.


Posted by j-anncamacho at 4:44 AM EST
Updated: Monday, 19 January 2009 5:22 AM EST
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