Articles That Might Interest:

Cisco CallManager-CCME

Cisco CallManager Express Basic Concepts - Part 2

Our previous article, Cisco CallManager Express Basic Concepts - Part 1 covered the very basic concepts of CCME and its operation. This article continues with the Cisco CallManager Express basic conc…

Ethernet Protocol, CSMA/CD, Collisions

Manchester Signal Encoding

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…

VLAN Networks

VLANs - IEEE 802.1q Trunk Link Protocol Analysis

While the VLAN Tagging article briefly covered the IEEE 802.1q protocol this article will continue building upon it by further analyzing the IEEE 802.1q Trunk Link Protocol. The IEEE 802.1q tagging m…

Linux - Unix

Working with Linux TCP/IP Network Configuration F…

This article covers the main TCP/IP network configuration files used by Linux to configure various network services of the system such as IP Address, Default Gateway, Name servers - DNS, hostname and…

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 their requirements and initial administrative overh…

Cisco Wireless

Cisco Aironet 1242AG /1240 - Multiple SSID & 80…

This article explains how the Cisco 1240 series access point can be setup to provide support for multiple SSID, each SSID assigned to a separate VLAN. This type of configuration is id…

SASE & SD-WAN Networks

SD-WAN is the Emerging, Evolving Solution for the…

A lot has changed in how people work during the past twenty years. Co-working spaces, mobility, and the cloud now are common. Businesses are spread out and branch offices are empowered. This new fun…

Cisco Routers

How To Configure DHCP Server On A Cisco Router

DHCP (Dynamic Host Configuration Protocol) is the protocol used by network devices (such as PCs, network printers, etc) to automatically obtain correct network parameters so they can access network a…

Windows Workstations (XP, 7, 8, 10, 11)

How to Enable & Use Windows 8 Startup Settings Bo…

The Windows 8 Start Settings Boot Menu allows users to change the way Windows 8 starts up. This provides users with the ability to enable Safe Mode with or without Command Prompt, Enable Boot Logging…

Cisco Services & Technologies

Comparing DMVPN Single Tier and Dual Tier Headend…

This article extends our DMVPN article series by answering common questions regarding the differences between Single Tier Headend and Dual Tier Headend architectures. When hearing the DMVPN terms si…

Windows Servers

Windows 2012 Server Foundation, Essential, Standa…

FREE Hyper-V & VMware Virtualization Backup: FREE for Firewall.cx readers for a Limited Time! Download Now! Windows Server 2012 Editions On the 1st of August, 2012 Microsoft releas…

Cisco Wireless

Cisco Wireless Controllers (WLC) Datasheets Avail…

We would like to inform our readers that Firewall.cx has just made available as a free download all of Cisco's Wireless Controller Datasheets. The datasheets provide valuable infomation for all curr…