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Maximizing Network Security: A Deep Dive into OpM…
In the rapidly evolving landscape of cyber threats, network security has never been more crucial. With the frequency and sophistication of cyberattacks escalating, organizations are under constant pr…
Comparing DMVPN Single Tier and Dual Tier Headend…
This article extends our DMVPN article series by answering common questions regarding the differences between Single Tier Headend and Dual Tier Headend architectures.
When hearing the DMVPN terms si…
Download Altaro Free VM Backup & Win a PlayStatio…
We have some exciting news for you today!
Altaro has launched a great contest in celebration of SysAdmin Day on 27th July!
They will be giving away Amazon eGift Cards to the first 100 eligible entr…
Linux VIM / Vi Editor - Tutorial - Basic & Advanc…
When you are using Vim, you want to know three things - getting in, moving about and getting out. Of course, while doing these three basic operations, you would like to do something meaningful as wel…
Configuring PPTP (VPDN) Server On A Cisco Router
The Point to Point Tunneling Protocol (PPTP) is a network protocol used to create VPN tunnels between public networks. These VPN tunnels are encrypted from one end to the other and allow the secure t…
IP Subnetting - Part 3: Subnet Mask Bits & Analys…
So we have covered to some depth the subnetting topic, but there is still much to learn ! We are going to explain here the available subnet masks and analyse a Class C network, using a specific subne…
Connecting & Configuring SPA8000 with UC500, 520…
When it comes to connecting multiple analog phones to VoIP systems like Cisco’s Unified Communication Manager Express (CallManager Express) or UC500 series (Includes UC520, UC540, UC560), the first t…
Resolving Cisco Switch & Router ‘DHCP Server Pool…
In previous articles, we showed how it is possible to configure a Cisco router or Catalyst switch to provide DHCP server services to network clients. Everything usually works without a problem, howev…
Propagation Delay
You may know that the minimum frame size in an Ethernet network is 64 bytes or 512 bits, including the 32 bit CRC. You may also know that the maximum length of an Ethernet cable segment is 500 meters…
IP Phone 7900 Series (7940, 7941, 7942, 7960, 796…
This article explains how to reset your Cisco 7940, 7941, 7942, 7960, 7961, 7962 & 7920 IP phone to factory defaults, and how to upgrade its firmware to the latest available version.
When initia…
The OSI Model: Layer 4 - Transport Layer
The Transport layer is responsible for providing mechanisms for multiplexing upper-layer application, session establishment, data transfer and tear down of virtual circuits. It also hides details of…
Network Data Transmission
Network data transmission refers to the process of sending and receiving information between two or more devices connected to a network. It is a critical aspect of modern-day networking, and it enabl…
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