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Showing posts from September, 2016

Eat that Frog Chapter - 1

Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time by Brian Tracy
Chapter - 1 - Set the Table
Recently, I have started reading the book "EAT THAT FROG" by Brian Tracy. So here I am giving you the summary of the first chapter which I have recently completed. The title of the first chapter is "Set your Table" which means  Clarity of the goal that you set. Clarity is described by the author as the most important part for personal productivity. Why some people are ultra productive and other are very less productive. The reason behind is thst the ultra productive people are well focused on their goals and tasks.
A major reason for procrastination to do the work is the cloud and haziness of the goal in front of your eyes. We don't have clarity about the goal. We are not certain about what we have to do and in which order . To over come this habit of procrastination, Brain Tracy has described seven step method as mentioned below :

St…

Why all areas must be connected to area 0 in OSPF

Why all areas must be connected to AREA 0 in OSPF ?
When you learn regarding OSPF the first concept which you come across is that all areas must be connected to AREA 0 or backbone area to transfer traffic from one non Backbone area to other non Backbone area. Like if suppose you have three areas in OSPF -  Area 0 , Area - 1 , Area - 2. There are two users one is in Area 1 and other is in Area 2. They want to communicate with each other.Now how will they communicate ?  :roll:

User 1 of Area 1 send traffic to Area 0 then traffic will move from Area 0 to Area 2 and finally reach to user 2 of Area 2 right ? This a strict rule on which OSPF works. But why this rule exists? This post describes all about this.

As you know Routers in same area exchange each and every information known as LSA (Link state advertisement) to each other.Only summary routes or Summary LSA are forwarded to backbone area via ABR (Area Border Router) which is connected to this area and backbone area. Ok, here I think…

Single Mode vs Multimode fiber

Singlemode vs Multimode fiber


If you are a network engineer then you must have an encounter with fiber cables which gets connected to various Cisco Devices. These optical fibers or Fiber cables are generally used to connect backbone network with switches. Like for instance,  Access switches are connected to core switch via  optical fiber cable. There are basically two types of Optical Fibers which are commonly used for interconnecting different Network Devices :

Single Mode
Multi mode
So, in this post I will talk about both the singlemode as well as  multimode fiber in the simplest way possible. I will not go in depth of Fiber optics but I will give you the required information which should suffice practically for a network engineer.
Fiber cable consist of mainly four parts:

Core : This is the main component of the optical Fiber in which Lights travels. This is generally made up of pure glass.
Cladding : Core is surrounded by cladding to trap the light which is travelling in the core to pr…