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Articles That Might Interest:

Network Cabling
In this article, we'll talk about Fiber optic cables and how it has changed the design and implementation of network infrastructures, providing high Gigabit speeds, increased security, flexibility an…
Network Fundamentals
Network hubs were once the primary method of interconnecting network devices to create a local area network (LAN). Hubs were inexpensive, easy to install, and provided a simple means of connecting mu…
Cisco Firewalls
The Cisco ASA Firewall 5500-X series has evolved from the previous ASA 5500 Firewall series, designed to protect mission critical corporate networks and data centers from today’s advanced security th…
Cisco Services & Technologies
Apple Mac OS X users are frequently faced with the Cisco VPN Client Error 51 - Unable to Communicate with the VPN Subsystem as shown in the screenshot below: When this error is produced, users wil…
Network Protocols
In the previous tutorials, I went through the need for IPv6, and followed it up by drawing out the salient features which overcomes issues with IPv4. We took the journey of looking inside the headers…
ICMP Protocol
As mentioned in the previous page, an Echo is simply what we networking engineers call a 'ping'. The Echo Reply is, as most would guess,  the 'ping reply'. ICMP Echos are used mostly for trouble…
Windows Servers
Tombstone is a container object that contains the deleted objects from Active Directory. Actually when an object is deleted from Active Directory, it is not physically removed from the Active Directo…
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…
Cisco CallManager-CCME
This article covers the installation of Cisco's CallManager Express on Cisco routers. Here you'll find the necessary installation commands, files to download, router's HTTP server configuration comma…
Routing
We are going to analyse what happens when routing occurs on a network (IP routing process). When I was new to the networking area, I thought that all you needed was the IP Address of the machine you…
Windows Servers
Network Location Awareness (NLA) is a feature offered on Windows Server 2012 R2 and all Windows workstation editions from Windows 8.1 and above, including Windows 10. When connecting to a network (LA…
TCP - UDP Protocol Analysis
Finally, the last page of our incredible TCP Analysis. As most of you would expect, this section is dedicated to the DATA section that follows the TCP Header. The Data Section The following diagram…

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