Category: Networking Topics

10 Network Diagnostic Command-Line Utilities Every Network Tech Should Know

At first, I was going to write about all the different diagnostic command-line utilities, but after a thorough reflection, I realized how exhaustive that would be. For that reason, I've decided to restrict this post to network command-line tools only. Here are a few of the network commands every network tech should know. 1. ipconfig, ...

Intrusion Detection and Prevention Systems

The process of intrusion detection involves the monitoring of systems or networks for any signs and occurrences of events or incidents deemed either suspicious or in violation of to an organization's security policy or rule set. An "Intrusion Detection System (IDS)" is a hardware appliance or software that has the ability to detect signs of ...

Wi-Fi Standards: The IEEE 802.11 Wireless LAN Specifications

Throughout the years of Wi-Fi, the Institute of Electrical and Electronics Engineers (IEEE) have developed several specifications for its IEEE 802.11 family of standards for Wireless LANs (WLANs). Each 802.11 standard was created and maintained by the IEEE. The few that we use are the basis for our wireless networks at home and in enterprise ...

Covert Channels: How Insiders Abuse TCP/IP to Create Covert Channels

The TCP/IP protocol suite, our conceptual model we use to explain the way in which data travels across a network, contains a myriad of communication protocols. The TCP/IP protocol suite generically refers to two main protocols: TCP and UDP, but there are many other protocols, some of which can be abused to create covert channels. ...

Routers: Understanding The Basics

Routers   A router is a layer 3 (Network) device. Unlike hubs and switches that connect computers, servers, printers, or other peripheral systems together, a router connects networks together. Therefore, you can connect 2 or more LANs together and even connect two or more larger networks together in a WAN. There are several types of ...