Articles That Might Interest:

Domain Name System (DNS)

The DNS Protocol - Part 2: DNS Queries & Resoluti…

This section will help you understand how the DNS queries work on the Internet and your home network. There are two ways to use the domain name system in order to resolve a host or domain name to an…

Web Application Vulnerability Scanners

Understanding, Avoiding & Protecting Against Cros…

This article explains what a web browser cookie is and examines how Cross Site Request Forgery work by allowing hackers to intercept and access web browser cookies from unaware users trying to l…

Cisco Switches

DHCP Option 82 Message Format, Analysis. DHCP Sno…

This article provides in-depth analysis of DHCP Option 82 (DHCP Relay Agent) which is one of the +180 DHCP Options available to the DHCP protocol and used by the Bootstrap Protocol (BOOTP) used for a…

ManageEngine Firewall Analyzer

Discover the Ultimate Firewall Management Tool: 7…

Firewall security management is a combination of monitoring, configuring, and managing your firewall to make sure it runs at its best to effectively ward off network security threats. In this article…

Network Protocols

IPv6 Subnetting - How and Why to Subnet IPv6

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…

Virtualization & VM Backup

FREE Webinar - Fast Track your IT Career with VMw…

Everyone who attends the webinar has a chance of winning a VMware VCP course (VMware Install, Config, Manage) worth $4,500! Climbing the career ladder in the IT industry is usually dependent on one…

Cisco Firewalls

Cisco ASA Firepower Threat Defense (FTD): Downloa…

One Appliance – One Image is what Cisco is targeting for its Next Generation Firewalls. With this vision, Cisco has created a unified software image named “Cisco Firepower Threat Defense”. In t…

Ethernet Protocol, CSMA/CD, Collisions

The IEEE 802.3 SNAP Frame Format

While the original 802.3 specification worked well, the IEEE realized that some upper layer protocols required an Ethertype to work properly. For example, TCP/IP uses the Ethertype to differentiate b…

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) trunks. When VTP pruning is enabled on a trunk, the…

Subnetting

IP Subnetting - Part 3: Subnet Mask Bits & Analys…

So we have covered to some depth the subnetting topic, but there is still much to learn ! We are going to explain here the available subnet masks and analyse a Class C network, using a specific subne…

Cisco CallManager-CCME

Cisco CallManager Express CME v8.8 & v9.0 GUI Web…

Cisco's CallManager Express GUI interface is an important part of the CallManager Express product as it provides the ability to administer CME via a web browser. Generally, the CME GUI interface is e…

Virtualization & VM Backup

6 Key Areas to Consider When Selecting a VM Backu…

Backup and Disaster recovery are core considerations for any business with an IT footprint, whether that is on-premises or in the cloud. Your business depends on reliable IT systems to support the b…