What is mounting : ? Mounting is the process of attaching the file system [ location to store the files ] to plugging device [ e.g USB ] that attached to our system. We might not need to do this all time as some flavour of linux system do this for us but that function… Read More »
TCPDUMP is one of the most powerful packet analyzer that we can run on command line interface at the time of troubleshooting to display TCP IP packets that being transmitted or received over a network. It can run on most of the Unix/Linux flavors and it also allow us to save the file which we… Read More »
OSI Model Real world is step by step analysis of what happen behind the scene when we visit the website using the internet .We will go through the Packet flow by analyzing each layer of the OSI model. Everyone must have basic understanding of OSI model and the packet format in each layer before going… Read More »
In my journey of understanding the TCP/IP world. I found the understanding and learning about the IPV4 Header is most critical and useful for everyone. In this article we will not only discuss the function of each field, we will also see how these field changes when we send different kind of traffic. Overview of… Read More »
When we are reading OSPF at the beginning level, the most of the books only highlight about the two important timers of OSPF i.e. Hello and Dead interval but there is another timer which OSPF speaking router uses during DR and BDR election i.e. wait timer. Topology: If we look at our above topology, we… Read More »
Fig 1. Standalone Switch: Summit X430 Fig 2. Extreme Stack : Summit X440 Series Fig 3. Modular Switch : BD 8800 In this article we will learn basics of the Extreme command line interface.I thought the best way to demonstrate it by working with network topology and try to configure it from the scretch.To make the… Read More »
Overview IPSEC [IP Security] is used to secure IP [IPV4 and IPV6] traffic over an untrusted network [such as the Internet] by enabling a system to select required security protocols [AH or ESP], algorithms and cryptographic keys. IP Sec Protocol used in a site-to-site VPN which interconnects two sites without requiring the computers at those… Read More »
I found Help function in python comes handy to get quick information about the different modules and its classes used in any of our program. The syntax is as follow.
MTU-related war story Found it’s interesting. Source: https://news.ycombinator.com/item?id=4709438 Well, while we’re at it, here’s my crazy MTU-related war story, although not as crazy as that one! I was troubleshooting with a user of an audio streaming application running over a LAN. The user could stream classical music but not rock music. Seriously. Classical was fine,… Read More »
The Fundamental Truths Found it’s interesting. Source : https://tools.ietf.org/html/rfc1925 (1) It Has To Work. (2) No matter how hard you push and no matter what the priority, you can’t increase the speed of light. (2a) (corollary). No matter how hard you try, you can’t make a baby in much less than 9 months. Trying to… Read More »