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Category: CCNP


Linux Dig Command Tutorial With Examples

Dig stands for Domain Information Groper. Dig is used to interrogate DNS servers. It have a lot of features to interact and use DNS servers. In this tutorial we will look popular and useful dig command usages. Most of the system and network administrators uses dig to debug DNS related issues. Help Help information about dig command can be listed with the -h option.

Man Detailed help information can...


Linux Netstat Command With Examples

Linux provides a lot of tools for network management and visibility. netstat is another popular and useful tool used by a lot of system and network administrators. In this tutorial we will look usage examples of netstat. Syntax We will use following syntax for the netstat command.

List All Connections A typical Linux system will have a lot of different connections. These connection types can be Unix Sockets, IPX Sockets,...


What is DHCP and How It Works?

DHCP stands for Dynamic Host Configuration Protocol. As its name suggests DHCP is used to provide configuration like Ip Address, Network Mask, Dns, Proxy, Bootp, Default Gateway etc. to the host. But the most know and popular usage is distributing IP address. There are broad range of DHCP usage scenarios. In this tutorial we will look IP address distribution of DHCP with an example. Phases DHCP IP address assignment is...


Linux Ip Command With Examples- Network Management

Linux network stack provides a lot of network related features like a commercial network router or switch. There are different tools and ways to manage these advanced features. In this tutorial we will look ip tool set which is new generation tool designed to manage Linux network configuration. Show IP Address IP address is the number used in the network to access a host.


As we see same command...


Compare TCP vs UDP Protocols , Differences and Similarities

Networks are used to transmit data over the world. There is a lot of network protocols in use. But most known and used protocols are IP,TCP,UDP. IP lives different flat but TCP and UDP tries to live same flat. So they operate same network layer but what is different between UDP and TCP. Why should I use TCP or not use? Same questions can be asked for UDP too. In...


How To Direct and Reverse Ip Look Up With Nslookup In Linux and Windows?

nslookup is a network tool using to query DNS to obtain domain name or IP address. The full name of nslookup is “name server lookup” . Nslookup supports interactive and batch mode. Nslookup alternative is dig which uses underlying Operating System libraries. Syntax Syntax is like below.

name is the domain name we want to use server is the DNS server we want to use where if not specified the system...


“No Route To Host” Error And Solution

While trying to ping or connect a remote host I can an error “no route to host”. How can I debug this error and solve it? As we know IP networks are constructed hop by hop which means there are different intermediate routers transmit packets between two remote hosts. These routers decides the route to the destination according to their routing tables. If destination route do not exists in the...


What Is My DNS Server and Hot To Change DNS Server For Windows, Linux?

Dns Servers are very important part of the internet and computer networks. When DNS servers are down we can not use internet in a easy manner. DNS servers provides domain name to IP or vice versa resolution. Windows Windows operating system family provides ipconfig command for general information gathering tool. ipconfig command without any parameter will show base configuration about the network of the operating system. Just issue following command...


What Is A Dns Server?

Domain Name System is a system or concept used to name hosts connected to the network. DNS is hierarchical which means there is tree like connection in the domain names. DNS is invented by Paul Mockapetris in 1983. What is Domain Name Domain name identifies hosts connected to the network. Domain names are unique. For example is a domain name. Here com is top level domain which is administrated by global organization a.k.a...


How To Install Gns3 To Fedora?

Gns3 very useful tool to simulate real networks and systems. In the first days of its Gns3 was simple Cisco IOS image emulator. But recent years its development has gained momentum. This made Gns3 a multi platform, flexible real world simulator. Gns3 supports systems like Cisco, Juniper, Palo Alto, Pfsense, Docker etc. In this tutorial we will look how to install Gns3 to the Fedora 64 bit. Get Gns3 Installation...

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