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Articles:
UDP Protocol - Header
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Suggested Articles:
Network Cabling
CAT5, CAT5e, CAT6 UTP X-Over / Cross-over Cable
The cross-over (or crossover) CAT5 UTP cable has to be one of the most used cables after the classic straight-thru cable. The cross-over cable allo...
The OSI Model
The OSI Model: Layer 2 - Datalink Layer
The Datalink ensures that messages are delivered to the proper device and translates messages from the Network layer into bits for the Physical lay...
Ethernet Protocol, CSMA/CD, Collisions
802.3 Fast Ethernet (100 Mbit/Sec) Model
Here we see a logical drawing of the Fast Ethernet Data Link Layer sublayers. Data is passed down from the upper layers (such as TCP/IP or Novell N...
Supernetting & CIDR
The Supernetting / CIDR Chart
This articles build upon our previous pages covering what is Supernetting (Route Summarization) & How Supernets Work and Supernetting In-...
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Netflow Articles:
![](/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/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 ...
![](/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/94/manageengine-netflow-analyzer-intro-94d1b60f.webp)
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...
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VLAN Networks
VLANs - Access & Trunk Links
If you've read our previous article The VLAN Concept - Introduction to VLANs then you should feel comfortable with terms such as 'VLAN', 'Sta...
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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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VLAN Networks
VTP Protocol - In-Depth Analysis
The previous article introduced the VTP protocol, we examined how it can be used within a network, to help manage VLANs and ease the administrative over...
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VLAN Networks
VTP Introduction & Modes
The invention of VLANs was very much welcomed by all engineers and administrators, allowing them to extend, redesign and segment their existing network ...
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Routing
Interior Gateway Protocol - IGRP
IGRP (Interior Gateway Routing Protocol) is a Cisco proprietary distance-vector routing protocol used in enterprise networks to exchange routing informa...
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Routing
Distance Vector Routing Protocols
Distance Vector routing protocols use frequent broadcasts (255.255.255.255 or FF:FF:FF:FF) of their entire routing table every 30 sec. on all their inte...
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Routing
Routing Information Protocol - RIP
Routing Information Protocol (RIP) is a distance-vector routing protocol that is commonly used in small to medium-sized networks. It is one of the...
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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 ...
Cisco Switches
Download The Complete Cisco Catalyst Switching Portf...
The Cisco Catalyst Switching Portfolio is perhaps one of the most useful Cisco PDF files, containing all Catalyst series products. The portfolio ...
Cisco Routers
How To Secure Your Cisco Router Using Cisco AutoSecu...
In today’s complex network environments securing your network routers can be a daunting task, especially when there are so many CLI commands and paramet...
SASE & SD-WAN Networks
WAN Optimization vs SD WAN Networks. Today’s Challen...
Enterprises have been successfully running WAN optimization appliances at their many distributed sites for years. The devices have done a good job of he...
Windows Servers
Introduction To Windows Server 2012 R2 Virtualizatio...
FREE Hyper-V & VMware Backup: FREE for Firewall.cx readers for a Limited Time! Download Now!
Virtualization is an abstraction layer th...