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Archive for February, 2010

The EIGRP Algorithm

February 21st 2010 Posted at Technology
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EIGRP algorithm-

Distance vector routing protocol use some variant of the bellman-ford algorithm.EIGRP uses DUAL with implement features that are nor found in the other distance vector routing protocol like RIP and IGRP.EIGRP does not send the periodic updates.EIGRP uses the hello protocol, monitor the connection status with its neighbors. When a new link is added or any link becomes unavailable, these changes occur routing updates.

Path determination in EIGRP-

Distance vector routing protocol like RIP and IGRP keep the track of the best path for the particular destination. If the route becomes unavailable, the router waits for another routing updates for the path of destination network.

EIGRP uses DUAL that maintain a topology table that is separate from the routing table, which contain the best path to the destination network and also the back up path that DUAL has determined to be loop-free, means neighbor does not have a route to the destination network that passes through this router. If the route becomes unavailable, DUAL search its topology table for the back up path. If the routes exist, that route immediately entered into the routing table. If the back up path is not exist, DUAL performs a network discovery process to check whether there happens to be a back up path that did not meet the feasibility condition. This condition checks for the possibility of the routing loops.

Convergence in EIGRP-

Distance vector routing protocol like RIP and IGRP uses the periodic updates and they are prone to routing loops and the count-to-infinity problem. These protocols use several method to avid this problem like Hold-down timer which causes long convergence time.

EIGRP does not use the hold-down timer. In EIGRP loop- free path achieved through route calculation system and the result is faster convergence than other distance vector routing protocols. Robert Beegel has some great thoughts on it at his facebook page.

How to implement EIGRP-

The router eigrp autonomous- system global configuration command enables EIGRP.The autonomous system number is a number configured by the network admin.The range of AS is 1-65535 and it is important because all routers in this EIGRP routing domain must use the same AS number to communicate with each other. The configuration command is-

Router# config

Router (config) # router eigrp 1

Router (config-router) # network (network id’s)

Any interface on the router that matches the network address in the network command will enabled to send and received the EIGRP updates and this network will be included in the EIGRP routing updates.

Nursing – Online Nursing education

February 10th 2010 Posted at General
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Nursing – Online Nursing education and Cna Training

With the growing complexity in the field of nursing the demands for a qualified nurse has been on the rise. But the number of qualified nurses has not yet matched to the number of personnel needed. One of prime reasons for this is the fact the there are not many good nursing schools to cater to the ever rising demand for nursing courses among the students. The existing nursing schools too are finding it more and more difficult to make space for the demand as they has hardly have the infrastructure space as well as qualified teachers. A result of this they are not able to cater to the ever rising demand. To encounter this various universities have worked on a good high quality online nursing courses. This makes is easy for people to join these course be it where ever they are located and also the universities do not have to think about the space to accommodate them.

These online programs on nursing are not secondary to any of the traditional nursing courses. They act bridge in full filling the void and also give a great opportunity to the aspiring student go get waitlisted due to shortage of seats in regular colleges. The students who get wait listed are not any less talented or less deserving. It is only because of storage of good nursing colleges and faculties which is the reason for these students to get waiting and nothing else.

Online nursing courses do not take a lot of your time. You do not have sit a class room for the whole day. So you do other things as well in a day. For instance if you are working you do not have to quit to study nursing. You can very well work and study when ever you get time. This allows you to do other things. This would not be possible on normal nursing course. At the most you can work part for a few hours. With online courses you can work full time as well as study.

Some people have a misconception that online nursing programs are all theoretical and not much practical as it is not done on a classroom. This belief is now where near the truth. The universities which offer the online courses do hold practical sessions on local clinics or hospitals. All possible things which need practical trainings are covered in these sessions.

Following are some of the benefits of online nursing courses:

1. Online programs save on you from driving or riding to school, traffic problems etc there by a saving a lot of time your.

2. You can plan your own schedule to study as per your time constraints rather than following the schedule of a school which might be not very easy

3. As you have access to the study material you may well skip the portions you know rather than going through for the sake of it.

4. Online nursing programs much less expensive compared to regular courses. If money is problem for doing normal courses you can go for these online programs.

4. Above anything else you can get a four year degree in just two years.