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Articles:
ISDN Layers, Protocols & Components
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Articles:
Introduction To The ISDN Protocol
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Introduction To Protocols
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File Transfer Protocol - FTP
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Trivial File Transport Protocol - TFTP
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IPSec - Internet Protocol Security
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Suggested Articles:
ICMP Protocol
ICMP Protocol - Part 5: Source Quench Message A...
The ICMP - Source Quench message is one that can be generated by either a gateway or host. You won't see any such message pop up on your workstatio...
TCP - UDP Protocol Analysis
TCP Header Anaylsis - Section 2: TCP Sequence &...
This page will closely examine the Sequence and Acknowledgement numbers. The very purpose of their existence is related directly to the fact that t...
The OSI Model
Data Encapsulation & Decapsulation in the OSI M...
Here we are going to explain in detail how data travels through the OSI model. You must keep in mind that the OSI model is a guideline. It tells th...
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Network Fundamentals
Next-Gen Firewalls & Topologies. Designing & Bu...
Next-generation firewalls (NGFWs) and DMZ zones are two critical components of network security that work hand in hand to protect an organization's...
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Netflow Articles:
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NetFlow Analyzer: Free Download, Step-by-Step I...
In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows...
![](/templates/yootheme/cache/44/netflow-monitor-network-bandwidth-application-traffic-intro-4483acc1.webp)
Netflow: Monitor Bandwidth & Network Utilizatio...
Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, appl...
![](/templates/yootheme/cache/7d/netflow-basics-netflow-components-rfc-history-intro-7db55966.webp)
Complete Guide to Netflow: How Netflow & its Co...
This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive i...
![](/templates/yootheme/cache/68/netflow-vs-snmp-intro-68e06ad3.webp)
Netflow vs SNMP. Two Different Approaches to Ne...
SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ...
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VLAN Networks
Static VLANs
VLANs are usually created by the network administrator, assigning each port of every switch to a VLAN. Depending on the network infrastructure and secur...
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VLAN Networks
Dynamic VLANs
Dynamic VLANs were introduced to grant the flexibility and complexity(!) that Static VLANs did not provide. Dynamic VLANs are quite rare because of thei...
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VLAN Networks
Comparing Traditional Flat & VLAN Networks
Designing and building a network is not a simple job. VLANs are no exception to this rule, in fact they require a more sophisticated approach because of...
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VLAN Networks
VTP Pruning
VTP (VLAN Trunking Protocol) pruning is a feature that is used in Cisco switches to reduce unnecessary traffic in VLAN (Virtual Local Area Network) trun...
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Routing
The IP Routing Process - Step-by-Step Analysis
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 yo...
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Routing
Routed Protocols
We all understand that TCP/IP, IPX-SPX are protocols which are used in a Local Area Network (LAN) so computers can communicate between with each other a...
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Routing
OSPF - Part 2: How OSPF Protocol Works & Basic Conce...
This article covers basic OSPF concepts and operation. We explain how OSPF works, how OSPF tables are built on an OSPF-enabled router and their purpose ...
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Routing
OSPF - Part 4: OSPF Neighbor States – OSPF Neighbor ...
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 ...
Windows Servers
New Features in Windows Server 2012 - Why Upgrade t...
There is no doubt that Cloud Computing is hot topic these days. Innovations in cloud computing models have made every industry and company IT department...
Network Protocol Analyzers
How to Reconstruct HTTP Packets/Data & Monitor HTTP ...
HTTP reconstruction is an advanced network security feature offered by nChronos version 4.3.0 and later. nChronos is a Network Forensic Analysis applica...
Cisco Switches
VLAN Security Tips - Best Practices
This article focuses on VLAN Security and its implementation within the business network environment. We provide tips and Cisco CLI commands that will h...
Windows Servers
Configuring Local Group Policy for Windows 2003
Windows 2003 Group Policies allow the administrators to efficiently manage a group of people accessing a resource. Group policies can be used to control...