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IP Protocol - Part 1: Binary & The Internet Proto…
To understand the Internet Protocol, we need to learn and understand Binary. It is very important to know and understand Binary because part of the IP protocol is also the "Subnetting" section which…
Early Communication Technology - Morse Code and E…
We tend to think of digital communication as a new idea but in 1844 a man called Samuel Morse sent a message 37 miles from Washington D.C. to Baltimore, using his new invention ‘The Telegraph’. This…
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…
OSPF - Part 4: OSPF Neighbor States – OSPF Neighb…
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 process. We analyze OSPF states (Init state, 2-…
Understanding, Administering Linux Groups and Use…
In a multi-user environment like Linux, every file is owned by a user and a group. There can be others as well who may be allowed to work with the file. What this means is, as a user, you have all th…
Introduction To Cisco Wireless Controllers (WLC)…
The Cisco Wireless Controller (WLC) series devices provide a single solution to configure, manage and support corporate wireless networks, regardless of their size and locations. Cisco WLCs have beco…
Linux BIND DNS - Part 4: Common BIND Files - Name…
So far we have covered in great detail the main files required for the firewall.cx domain. These files, which we named db.firewall.cx and db.192.168.0, define all the resouce records and hosts availa…
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…
Active Directory Tombstone Lifetime Modification
Tombstone is a container object that contains the deleted objects from Active Directory. Actually when an object is deleted from Active Directory, it is not physically removed from the Active Directo…
Cisco CallManager Express Basic Concepts - Part 1
This article introduces basic CallManager Express (CCME) concepts by covering how a CCME router operates, how calls are setup between Cisco IP phones but also the role of a CCME router in this proces…
Introduction to Routing Protocols
Distance Vector, Link State RIP, IGRP, EIGRP, OSPF
Routing protocols were created for routers. These protocols have been designed to allow the exchange of routing tables, or known networks, betwee…
Network Management Systems Help Businesses Accura…
Accurately monitoring your organization’s business application performance, service provider SLA breaches, network infrastructure traffic, bandwidth availability, Wi-Fi capacity, packet loss, delay…
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