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CCNA study: FHRP or “First Hop Redundancy Protocols”

CCNA study: FHRP or “First Hop Redundancy Protocols”

| May 30, 2014 | 4 Replies

I’m amazed at how the approach of the CCNA certification has changed since the time I took my test and entered the Cisco world officially. Even though I personally believe Cisco has done a great job at gathering the topics and assembling tough evaluations, somehow there comes a point where technology changes and the topics […]

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Explicit Tracking of Group Membership and Fast Leave in IGMP

Explicit Tracking of Group Membership and Fast Leave in IGMP

| March 26, 2014 | Reply

  Before I explain what and how explicit tracking of group membership works in IGMP, let me give you a brief introduction to IGMP. A brief introduction to IGMP: Internet Group Management Protocol ( IGMP ) is used by end hosts and routers to exchange multicast group membership information. IGMP has two parts. One part […]

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What is Software Defined Networking (SDN) – Part 2

What is Software Defined Networking (SDN) – Part 2

| December 18, 2013 | 7 Replies

In my previous post, I explained what is Software Defined Networking (SDN). As I wanted to keep the introduction simple, I avoided discussing SDN internals in that post. Now that you understand what SDN is, let us get into other details.   SDN Internals In SDN, sequence of packets exchanged between two end-points is known as […]

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Interview with Liz Burn, Juniper Networks Certification Program Director

Interview with Liz Burn, Juniper Networks Certification Program Director

| November 25, 2013 | 1 Reply

The subject of Juniper Networks certifications is becoming more and more popular here on RouterFreak – just check the post You Don’t Need Cisco to be a Great Network Engineer and Junos Genius: your APP for Juniper Networks certifications. The question many of you have in mind is: why get a Juniper Networks Certification? Is it […]

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What is Software Defined Networking (SDN) – Part 1

What is Software Defined Networking (SDN) – Part 1

| November 13, 2013 | 5 Replies

The whole data communication industry is bullish about Software Defined Networking (SDN). What is SDN? Is it really a game changer? I think nobody knows that for sure because it is still evolving. While there have been some companies which have deployed SDN in their Data Centers, it is still not clear how and when it […]

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Junos Genius: your APP for Juniper Networks certifications

Junos Genius: your APP for Juniper Networks certifications

| October 22, 2013 | 5 Replies

Are you preparing for a Juniper Networks certification? Remember what we wrote some time ago: You Don’t Need Cisco to be a Great Network Engineer. Some of you may have already jumped on the Juniper wagon, as certified Engineers are still in high demand. Just recently the vendor released an interesting app to help all of […]

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Other Recent Posts

Interview Questions for Network Engineers

Interview Questions for Network Engineers

| January 23, 2015 | 80 Replies

Are you thinking about getting a job as a Network Engineer?  Are you considering leaving your present position and getting a new job at a new company?  Has it been a while since you’ve interviewed?   If you’ve answered yes to any of these questions then this is the post for you!  We’ve compiled a […]

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A Certification Does NOT Make You a Network Engineer

A Certification Does NOT Make You a Network Engineer

| January 22, 2015 | 33 Replies

Don’t Drink Too Much of the Kool-Aid First let me see a show of hands of how many people know what a vendor certification is? … A vendor certification is created by a computer equipment manufacturer, like a Cisco, Juniper Networks or Microsoft to help train their minions to operate their gear and help sell […]

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MPLS in the DataCenter?

MPLS in the DataCenter?

| January 15, 2015 | Reply

MPLS in the DataCenter? According to Juniper, they say “HECK YEAH!” and I can totally see why. Most data centers have a nicely redundant, fully meshed switching architecture. Most host servers are multi-homed (or connected to two separate switches for redundancy) and the access layer switches are multi-homed to the core to provide a fast […]

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Cloudy Forecast for Network Engineers?

Cloudy Forecast for Network Engineers?

| January 8, 2015 | Reply

The winds of change are blowing in the world of information technology. They have been for awhile, but speeds have picked up in recent years due to global markets demanding more efficiency out of most companies and industries. Coupled with the rise in remote service technology, it’s easy to see why most business leaders are choosing to minimize their […]

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Time–Based Access Control Lists

Time–Based Access Control Lists

| January 3, 2015 | 1 Reply

As you probably know, access control lists (ACLs in further text) are a means of providing firewall protection. Except the basic division on standard and extended ACLs, we distinguish between time-based, reflexive ACLs, turbo ACLs, and many other. The focus of this article are time-based ACLs, when should you use them and how to apply […]

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