Articles That Might Interest:

Linux - Unix

Understanding, Administering Linux Groups and Use…

In a multi-user environment like Linux, every file is owned by a user and a group. There can be others as well who may be allowed to work with the file. What this means is, as a user, you have all th…

Routing

OSPF - Part 4: OSPF Neighbor States – OSPF Neighb…

This is the third article of our OSPF series which analyzes the different OSPF States routers go through during the OSPF discovery and neighbor forming process. We analyze OSPF states (Init state, 2-…

SASE & SD-WAN Networks

Configuring A SASE Unified Network: Data centers…

This article explores the need for Secure Access Service Edge (SASE) in today’s organizations. We show how one of the most advanced SASE platforms available, combines VPN and VPN and SD-WAN capabilit…

Cisco Switches

Forcing A Cisco Catalyst Switch To Use 3rd Party…

Many companies are seeking for Cisco SFP alternatives to help cut down the costs on these expensive modules. A frequent customer problem with Cisco's new line of Catalyst switches is that they do no…

Netflow

NetFlow Analyzer: Free Download, Step-by-Step Ins…

In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows while at the same time analyze traffic patterns, de…

Virtualization & VM Backup

SysAdmin Day 2020 - Get your Free Amazon Voucher…

SysAdmin Day has arrived, and with it, gratitude for all the unsung heroes that 2020 has needed. Your hard work has made it possible for all of us to keep going, despite all challenges thrown our way…

Network Fundamentals

Multicast - Understand How IP Multicast Works

Multicast is a communication method used in computer networking where data is sent from a single sender to a group of destination devices. In this method, the sender sends the data packet to a speci…

Cisco Routers

Cisco Router 'User Exec' Mode

Introduction Let's see what it looks like to be in User-Exec mode on a Cisco router. Below, we have telneted into our lab router and are in User Exec Mode: The easiest way to keep track of the mo…

Linux - Unix

Linux BIND DNS - Part 5: Configure Secondary (Sla…

Setting up a Secondary (or Slave) DNS sever is much easier than you might think. All the hard work is done when you setup the Master DNS server by creating your database zone files and configuring th…

Network Fundamentals

Network Broadcast

The term "Broadcast" is used very frequently in the networking world . You will see it in most networking books and articles, or see it happening on your hub/switch when all the LED's start flashing…

Network Fundamentals

Network Unicast - Its role and Importance

Unicast is a communication method used in computer networking where data is sent from a single sender to a specific destination device. In this method, the sender sends the data packet to a uni…

Ethernet Protocol, CSMA/CD, Collisions

IEEE 802.3 Interframe Spacing

The IEEE 802.3 specification states that before a station can attempt to transmit on the wire, it must first wait until it has heard 9.6 microseconds of silence. Many popular myths have arisen surrou…