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DefinitionsNovember 27, 2019

What is Optimal Routing and Suboptimal Routing in Networking

This may be seen as very easy for some of you but let's make a philosophy a little bit, which means let's design around optimal routing. Network engineers know that...

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DefinitionsNovember 27, 2019

What is Carrier Hotel?

What is Carrier Hotel? Carrier Hotel is a Company that owns large buildings and rents out redundant power and floor space. And of course, attracts many Telco’s and Carrier...

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BGPNovember 27, 2019

What is AIGP – Accumulated IGP Metric Attribute? Where AIGP is used?

AIGP stands for Accumulated IGP Metric Attribute which is specified in RFC 7311. IGPs (Interior Gateway Protocols) are designed to run within a single administrative domain and they make path-selection...

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DefinitionsNovember 27, 2019

What is last hop router and first hop router in Multicast?

What is last hop router and first hop router in Multicast? These are important terms which are used in Multicast. In this post, I will explain the terms, differences and...

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Best Practices in Network DesignNovember 27, 2019

BGP Optimal Route Reflection – BGP ORR

BGP Optimal Route Reflection provides Optimal Routing for the Route Reflector Clients without sending all available paths. I recommend you to read this post if you don't know about BGP...

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DiscussionsNovember 27, 2019

Why submarine cable, why not satellite?

Why submarine/subsea cables rather than satellite? This started as a story between a friend of mine from a finance background and myself. One of my friends, who is totally foreign...

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Transport NetworkNovember 26, 2019

What is Layer 0 in the OSI Layers ?

Isn't OSI (Open Systems Interconnection) seven layers?Yes it is. In the standard, seven layers have been defined. Just let's remember the seven layers of OSI. Layer 7: The application layer.Layer...

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Transport NetworkNovember 26, 2019

Microwave or Fiber which one is faster?

I will explain the faster connectivity option and some of the use cases for each, deployment considerations a bit in this post. Why latency is important for some special businesses?...

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VPNNovember 26, 2019

GRE Tunnels – Generic Routing Encapsulation – Use Cases

GRE tunnels are by far most common tunnelling technology. Very easy to setup, troubleshoot and operate. But in large scale deployment, configuring GRE tunnels become cumbersome, because GRE tunnel is...

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AnnouncementsNovember 26, 2019

Global CCDE List

How many CCDEs are there in the world? What country has the most CCDEs? How do you become a CCDE Global List member? You can find out the answers to...

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CertificationsNovember 26, 2019

CCDE Salary – How much you can get if you pass Cisco CCDE ?

Many people have been searching these two words on the website. Many people also have been asking to me , how much they can earn monthly if they pass CCDE...

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Basic NetworkingNovember 26, 2019

BFD is not a Fast Convergence mechanism!

BFD is not a fast convergence mechanism. BFD stands for Bidirectional Forwarding Detection. It is an important tool for the IP layer but there is a confusion in the network...

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