Articles That Might Interest:

Ethernet Protocol, CSMA/CD, Collisions

Late Ethernet Collisions

Late collisions, on the other hand, are not normal and are usually the result of out of spec. cabling or a malfunctioning adapter. A late collision is defined as any collision that occurs after 512 b…

Network Cabling

Straight Thru UTP Cables

This article covers the commonly known Unshielded Twisted Pair (UTP) cable and shows how many pairs the UTP Cat5, Cat5e, Cat6 & Cat7 cables consists of, the colour coding they follow, the differe…

Cisco Data Center (Nexus/UCS)

Introduction to Cisco Nexus Switches – Nexus Prod…

This article introduces the Cisco Nexus product family (Nexus 9000, Nexus 7000, Nexus 5000, Nexus 3000, Nexus 2000, Nexus 1000V and MDS 9000). We explain the differences between Nexus and Catalyst sw…

Cisco Routers

Configuring NAT Overload On A Cisco Router

NAT (Network Address Translation) is a method that allows the translation (modification) of IP addresses while packets/datagrams are traversing the network. NAT Overload, also known as PAT (Port Addr…

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 the variety of protocols used to maintain and…

Network Fundamentals

Power over Ethernet - Understanding PoE Technolog…

Power over Ethernet (PoE) was invented by PowerDsine back in 1997 and the first power injector (Midspan) was installed in 1998! Many manufacturespartnered with PowerDsine to make useof this innovatio…

Network Fundamentals

Controlling Broadcasts and Multicasts

The first step in controlling broadcast and multicast traffic is to identify which devices are involved in a broadcast or multicast storm. The following protocols can send broadcast or multicast pack…

Ethernet Protocol, CSMA/CD, Collisions

Integrating Fast Ethernet into 10MB Ethernet Netw…

Now that Fast Ethernet is here, the question becomes, "How do I start using it ?" Integrating Fast Ethernet into existing networks need not be done all at once. Here are some aspects of 100Mbps impl…

ManageEngine Firewall Analyzer

Achieving Modern Compliance: Navigate PCI DSS v4…

In an era where cyber threats are growing in both volume and sophistication, failing to meet security compliance standards is no longer just a legal issue—it’s a business risk with potentially catast…

Cisco Services & Technologies

Unified Communications Components - Understanding…

What Is Unified Communications (UC)? Unified communications is a very popular term these days and we see it appearing on almost every vendor as they rename their platforms and products to incl…

Spanning Tree Protocol (STP)

Spanning Tree Protocol – Part 2: Rapid STP Port C…

Spanning Tree Protocol, Rapid STP port costs and port states are an essential part of the STP algorithm that affect how STP decides to forward or block a port leading to the Root Bridge. In our prev…

Cisco Switches

Cisco 4507R+E Layer 3 Installation: Redundant WS-…

It's no news that we here at Firewall.cx enjoy writing about our installations of Cisco equipment and especially devices that we don’t get to see and play with every day. Today we cover the installat…