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Multicast PIM Dense Mode vs PIM Sparse Mode
Multicast PIM Dense mode vs PIM Sparse mode is one of the most important things for every Network Engineer who deploys IP Multicast on their …
How Does Satellite Internet Work?
The orbiting satellite transmits and receives its information to a location on Earth called the Network Operations Center (NOC). NOC is connected to the Internet so …
BGP RTBH – Remotely Triggered Blackholing
BGP RTBH – Remotely triggered blackholing is used for DDOS prevention for a long time by many companies. DDOS – Distributed Denial of Service Attacks …
BGP-LS BGP Link State – What is it? Why BGP LS is used?
BGP LS, BGP Link-State is used to distribute Link state information and traffic engineering attributes from the network nodes to the Centralized TE controller. RSVP-TE has …
CCIE Service Provider v5.0 What, Why, When?
In this post, we will look at what is CCIE Service Provider v5.0, what comes with it, which technologies we need to learn, what is …
Orhan Ergun CCIE Enterprise Infrastructure Course Review 1
I see some people have been asking what other people are thinking about Orhan Ergun’s CCIE Enterprise course, thus starting today to share what other …
Why Core or Backbone is used in Networking?
Why Core or Backbone is used in Networking?. Before we start explaining this question, let’s note that these two terms are used interchangeably. Usually, Service …
Multicast BIER – Bit Indexed Explicit Replication
Multicast BIER – RFC8279 Bit Index Explicit Replication – BIER is an architecture that provides optimal multicast forwarding through a “BIER domain” without requiring intermediate …
What is NFV – Network Function Virtualization
Network Functions Virtualization (NFV) was founded by the European Telecommunication Standard Institute (ETSI) with Industry Specification Group (ISG) which contains seven of the world’s leading …
Bilateral Peering and Multilateral Peering
Bilateral Peering is when two networks negotiate with each other and establish a direct BGP peering session. In one of the previous posts, Settlement Free …
What is CDN – Content Delivery Networks?
Content Delivery Network companies replicate content caches close to a large user population. They don’t provide Internet access or transit service to the customers or …
What are New in Cisco CCDE v3 Exam?
Currently, in 2022, the CCDE exam version is version 3. There are many new changes in CCDE v3 compared to CCDE v2 and in this …
BGP Allowas-in feature Explained in 2022
BGP Allowas-in feature needs to be understood well in order to understand the BGP loop prevention behavior, But also, why the BGP Allowas-in configuration might …
BGP AS Override Feature Explained in 2022
BGP AS Override needs to be understood well in order to understand the BGP loop prevention behavior, But why BGP AS Override might create a …
BGP Route Reflector vs Confederation
BGP Route Reflector – RR vs Confederation is one of the first things Network Engineers would like to understand when they learn both of these …
BGP vs EIGRP 10 Important differences between them!
In this post, we will compare BGP and EIGRP. We will look at some of the important aspects when we compare BGP vs EIGRP. Although …
AWS SAA vs. CLF – Can I skip one?
AWS are known for their famous highly demanded Solutions Architect Associate (SAA) Certificate, and many thinks that it is the first step with AWS and …
OSPF Administrative Distance – How preferred is it
OSPF Administrative Distance, or OSPF AD, is the key of electing OSPF among other routing protocols (if existed) leading to the same target within the …
DMVPN vs MPLS VPN
DMVPN – Dynamic Multipoint VPN and MPLS VPN are two of the most popular VPN mechanisms. In this post, we will look at DMVPN vs …
IS-IS Routing Ptrotocol
IS-IS is a link-state routing protocol, similar to OSPF. If you are looking for Service Provider grade, MPLS Traffic Engineering support, and extendible routing protocol …