Below is the list of important link which are useful while troubleshooting of networking devices   http://cqcounter.com/whois https://www.submarinecablemap.com/ https://hexillion.com/ http://www.dnsstuff.com/tools#spamDbLookup http://www.isitdownrightnow.com/ http://www.websitedown.info

The practice of dividing a network into two or more networks is called subnetting. We steal bits from the hosts to create

Below is a list of well-known ports.   Port Number TCP/UDP Protocol 7 TCP/UDP ECHO 20 TCP File Transfer Protocol (FTP) Data

BGP Commands Cheatsheet: Learn about key differences among Cisco, Juniper, Alcatel, and Huawei vendors with this easy-to-use quick reference guide.   CISCO

Below is the list of OSPF commands for Cisco, Juniper, Alcatel, and Huawei.   CISCO JUNIPER ALCATEL HUAWEI show ospf show ospf

When there are two or more different routes to the same destination from two different routing protocols, Administrative Distance counts the reliability

Quick OSPF notes, made for network professionals seeking insights into key attributes, the link-state routing protocol, and network convergence. Open Shortest Path

Quick BGP notes, for network professionals seeking insights into key attributes, the path vector protocol, and routing decisions. Border Gateway Protocol (BGP) Basic

In mid-sized to large organizations, there is a continual demand for network engineers to manage and secure their network infrastructure, ensuring it