Beej’s Guide to Network Programming

A friend recommended this book. It is simple and good

Socket Programming

Although I hate programming so much I find socket programming quite interesting. I recommend Beej’s Guide to Network Programming. It's a fun way to start if you are scared of programming like I am.

Wireless Sensor Networks: Technology and Applications

Future of Wireless Sensor Networks

My TSHOOT Exam!

I was surprised by the format.. I expected the format to be like the ROUTE and SWITCH exam with good proportion of all types of question. But when the exam started the exam instruction said that there will be 4 questions and pass marks is 790! I read it twice and clicked next. The first 3 questions were multiple choice questions and the fourth one was a topology based question with 14 trouble tickets in it. The exam was brilliant. It was so much fun solving those trouble tickets. Absolutely scary too because I was running out of time. But it was great experience. The TSHOOT exam rocks..

CCNP Accomplished!!

Everyone, I finished my CCNP TSHOOT exam today and with it I have I have finished all 3 exams for CCNP! I will get my certification kit soon. Can't stop laying hands on it. Will update a blog soon about the TSHOOT exam. It was the best exam I ever took!

Things that you might miss when studying HSRP

1. HSRP group can contain more than two members; One is active member, one is standby router and the others will be in listening HSRP state.
2. HSRP sends hello messages to 224.0.0.2 (All Routers Multicast Address) using UDP port 1985.
3. HSRP group numbers can be [0,255]
4. HSRP groups are locally significant on the interface. This is very important point to understand. For example, HSRP group 1 on the VLAN 10 interface is not same as the HSRP group 20 on VLAN 11 interface.
5. HSRP router election:

            Default priority is 100
            Active Router is the one with the highest priority

            If there is a priority tie then the router with the highest HSRP Ip address wins.

    6.   HSRP States: Disabled> Init> Listen> Speak> Standby> Active.

    7.   Only standby member monitors the hello messages. Listening members do not monitor them.

    8.   Default hello message every =3s; Hold time=10s
    9.  The actual interface address and the standby address must be configured to be in the same IP subnet.