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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

IP Address Management Tools – A Review of Some of the Best IPAM Tools Available Today

IP Address Management Tools – A Review of Some of the Best IPAM Tools Available Today

| February 26, 2015 | 7 Replies

Most network engineers understand the frustration of managing ip addresses, especially when you work with a very large network. Being able to quickly and accurately find available ip addresses, know where each ip network range is located within the network, avoiding duplicate ip address assignments, and even still, know if the ip addresses in use […]

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What To do about SNMP-3-AUTHFAIL Messages

What To do about SNMP-3-AUTHFAIL Messages

| February 19, 2015 | Reply

Have you secured your router with an ACL for SNMP access but are still seeing pages of SNMP-3-AUTHFAIL messages in your logs? In this article we will be dig into this issue and find out exactly what’s going and and why an SNMP-3-AUTHFAIL message might showing up in your logs and also why this message […]

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Book review: Juniper SRX Series

Book review: Juniper SRX Series

| February 12, 2015 | 5 Replies

I met Brad, co-author of “Juniper SRX Series”, a few years ago when I was also working for Juniper Networks. I remember well how active he was in supporting the Juniper community on IDP first (the Intrusion Prevention solution) and SRX (the next-generation firewall family) later. So, when I saw this upcoming book on SRX […]

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Wireless Networking Basics

Wireless Networking Basics

| February 5, 2015 | 2 Replies

An Introduction to Wireless Networking Standards Way back in the early days of Wireless LAN (WLAN) development, there were a whole lot of folks trying different types of technologies to get wireless LAN communications to work.  Eventually some clear winners started to rise to the top and it was seen that interoperability between these technologies […]

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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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