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Windows Workstations (XP, 7, 8, 10, 11)
This article explains how the Windows operating system makes use of the popular Host file, where it is located for various operating systems, how it can be used to manipulate DNS lookups and redirect…
The OSI Model
The Presentation Layer gets its name from its purpose: It presents data to the Application layer. It's basically a translator and provides coding and conversion functions. A successful data transfer…
Cisco Firewalls
This article will show how to download and upload the newer AnyConnect 4.x VPN clients to your Cisco ASA Firewall appliance (5500 & 5500-X Series) and configure WebVPN so that the newer AnyConnec…
Windows Workstations (XP, 7, 8, 10, 11)
Thanks to the absence of dedicated serial ports on today’s laptops and ultrabooks, USB-to-Serial adapters are very popular amongst Cisco engineers as they are used to perform the initial configuratio…
Domain Name System (DNS)
If you ever wondered where DNS came from, this is your chance to find out ! The quick summary on DNS's history will also help you understand why DNS servers are run mostly on Linux and Unix-type syst…
Routing
Enhanced Interior Gateway Routing Protocol (EIGRP), similar to IGRP, is a Cisco proprietary routing protocol that is used to exchange routing information between different routers within a network. E…
Cisco Routers
Our Web SSL VPN article written back in 2011 introduced this new wave of VPN services.  This article extends the topic by covering the installation and configuration of Cisco’s SSL AnyConnect VP…
TCP - UDP Protocol Analysis
This article shows the TCP Header and Segment. We explain where the TCP Header and Segment are located in an Ethernet frame and also briefly view the available options in the TCP Header. Our easy-to-…
Ethernet Protocol, CSMA/CD, Collisions
The device driver software receives a frame of IP, IPX, NetBIOS, or other higher-layer protocol data. From this data, the device driver constructs a frame, with appropriate Ethernet header informatio…
Windows Servers
Part 1 of our Windows 2003 DHCP Server Advanced Configuration article explained the creation and configuration of DHCP Scope options and how to configure various DHCP server settings. This article fo…
Cisco Routers
In our article Cisco VPN Client Configuration - Setup for IOS Router  we explained how to setup up a Cisco IOS router to support Cisco IPSec VPN clients, allowing remote users to securely connec…
Windows Servers
Users working with Hyper-V Virtualization would be interested to know that Altaro is hosting a free webinar on the 25th of February 2016 at 4pm CET / 10am EST. Microsoft Cloud and Datacenter Manageme…

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