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A Network Router Is A Small Device That Allows You To Build A Computer Network. It Connects Computers Together So They Can Talk To One Another. This Allows You To Share Files, Printers, And Internet Connections. Welcome To RoutersGuide.com. This Site Is A Free Information Resource That Will Answer All Your Questions About Routers And Computer Networking. As
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Everything You Must Know About Computer Networking, Computer Networking Hardware, Networking Wireless, Internet Router, And Cisco Routers.
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Take These Simple Steps Now To Keep Hackers Out Of Your Computer

Wireless Security And Privacy Guides.
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Win-Spy Monitoring Software

Monitor Your Home Pc Or Any Pc Within Network.
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Free Cisco CCNA, CCENT, CCNP Certification Tutorial
By M. Aslam
Routing
Routing is a relay system by which packets are forwarded from one device to another. Each device in the network as well as the network itself has a logical address so it can be identified and reached individually or as part of a larger group of devices. For a router to act as an effective relay device, it must be able to understand the logical topology of the network and to communicate with its neighboring devices.
The router understands several different logical addressing schemes and regularly exchanges topology information with other devices in the network. The mechanism of learning and maintaining awareness of the network topology is considered to be the routing function while the movement of traffic through the router is a separate function and is considered to be the switching function. Routing devices must perform both a routing and a switching function to be an effective relay device. A router receiving a packet from a host, the router will need to make a routing decision based on the protocol in use; the existence of the destination network address in its routing table; and the interface that is connected to the destination network. After the decision has been made the router will switch the packet to the appropriate interface on the router to forward it out. If the destination logical network does not exist in the routing table, routing devices will discard the packet and to generate an Internet Control Message Protocol (ICMP) message to notify the sender of the event.
Routing Table
A routing table is a database repository that holds the router's routing information that represents each possible logical destination network that is known to the router. The entries for major networks are listed in ascending order and, most commonly, within each major network the sub networks are listed in descending order. If the routing table entry points to an IP address, the router will perform a recursive lookup on that next-hop address until the router finds an interface to use. The router will switch the packet to the outbound interfaces buffer. The router will then determine the Layer 2 address that maps to the Layer 3 address. The packet will then be encapsulated in a Layer 2 frame appropriate for the type of encapsulation used by the outbound interface. The outbound interface will then place the packet on the medium and forward it to the next hop. The packet will continue this process until it reaches its destination. There are two ways in which a routing table can be populated: a route can be entered manually, this is called static routing, or routers can dynamically learning a route. Once a router learns a route, it is added to its route table.
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A Quick Note
From The Publisher...
If you like the article above, you may be
interested in the following article which is also related to Routers...
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How To Secure Your Wireless Network |
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People have more flexible time due to wireless network. Thanks to the invention of wireless. People can now work from home while taking care of their kids or doing house works. No more stress from traffic jam anymore. Is this great?
Well, there is something you should realize. Working from home while using a wireless local area network (WLAN) may lead to theft of sensitive information and hacker or virus infiltration unless proper measures are taken. As WLANs send information over radio waves, someone with a receiver in your area could be picking up the transmission, thus gaining access to your computer. They could load viruses on to your laptop which could be transferred to the company's network when you go back to work.
Believe it or not! Up to 75 per cent of WLAN users do not have standard security features installed, while 20 per cent are left completely open as default configurations are not secured, but made for the users to have their network up and running ASAP. It is... |
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