ccna – POFTUT

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How To Download, Install Packet Tracer Into Windows?

Cisco Provides different level of certifications for its products and general network topics. We have all ready examined CCNA certifications in the following tutorial. What is CCNA or Cisco Certified Network Associate? Cisco certification exams mostly depends on practical experience. So a person who want to get certified needs practical experience. Here is a list of ways to get practical experience. At work Rent remote labs Using GNS3 similator Using...

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Introduction To Certified Information System Security Professional (CISSP)

There are a lot of security certifications in the IT sector. But only some of them are very prestigious and popular. Perhaps the most known and most respected security certificate is Certified Information System Security Professional (CISSP) certification. In this post we will get generally information about certification steps, topics, price etc. Information Systems Security Certification Consortium (ISC) CISSP exam is governed by ISC. ISC is global non-profit organization. ISC...

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Linux ping Command Tutorial With Examples

Ping is one of the most used tool for network diagnostics. When internet is not working, can not access file shares etc we will firstly ping command. Ping is one of the most known tool in the IT area. Ping actually uses ICMP packets to get information about network status. In this tutorial we will look practical use cases of Ping tool. Syntax Syntax of ping command for Linux is...

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Linux ss Command Tutorial With Examples

Linux processes communicates with socket between each other. There are tools to list, resolve, provide information about sockets. Ss is one of them. Netstat command can list and resolve the sockets too but it is slow because there is a lot of sockets. Ss gets information about socket from directly Linux kernel. List All Connections First of all existing connections, listening Unix and Network sockets can be listed with -l ....

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Linux Traceroute Command Tutorial With Examples

The network is an important part of the system administration. Because without a network the server has nothing to do. While administrating Linux servers troubleshooting network is very important. When a network problem occurs in a Linux server first step is checking network services and the route information. Network services can be checked with systemctl or similar commands. Network routes can be checked with different tools but the most popular and...

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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,...

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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...

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