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Ethernet Protocol, CSMA/CD, Collisions
The following is a description of the Ethernet Frame Format described in the IEEE 802.3 Specification. The 802.3 Specification defines a 14 byte Data Link Header followed by a Logical Link Control He…
Cisco Routers
Network Time Protocol (NTP) is a vital service not only for Cisco devices but almost every network device. Any computer-based device needs to be accurately synchronised with a reliable time source su…
ICMP Protocol
As mentioned in the previous page, an Echo is simply what we networking engineers call a 'ping'. The Echo Reply is, as most would guess,  the 'ping reply'. ICMP Echos are used mostly for trouble…
OpManager - Network Monitoring & Management
Accurately monitoring your organization’s business application performance, service provider SLA breaches, network infrastructure traffic, bandwidth availability, Wi-Fi capacity, packet loss, delay…
VLAN Networks
The previous article introduced the VTP protocol, we examined how it can be used within a network, to help manage VLANs and ease the administrative overhead, providing a stress-free VLAN environment…
Ethernet Protocol, CSMA/CD, Collisions
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…
Routing
Routing Information Protocol (RIP) is a distance-vector routing protocol that is commonly used in small to medium-sized networks. It is one of the oldest routing protocols still in use today, h…
Routing
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…
The OSI Model
Here we are going to explain in detail how data travels through the OSI model. You must keep in mind that the OSI model is a guideline. It tells the computer what it's supposed to do when data needs…
Cisco Services & Technologies
By: Arani Mukherjee & Chris Partsenidis For a successful networking professional it is essential to gain information on-the-fly about the network infrastructure he or she is working on. For a su…
Cisco CallManager-CCME
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…
Cisco CallManager-CCME
Mentioned in Part-1 of our Cisco Unity Express installation article, the Cisco Unity Express setup procedure is identical for ISM-SRE-300-K9 and SM-SRE-700-K9 modules. We will be using the smaller IS…

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