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SASE & SD-WAN Networks
The Virtual Private Network (VPN) has become the go to security solution for keeping communications between networks and endpoints secure. After all, VPNs offer a straightforward, secure method for c…
SASE & SD-WAN Networks
With so much enterprise network traffic now destined for the cloud, backhauling traffic across an expensive MPLS connection to a data center to apply security policy no longer makes sense. Software-d…
Ethernet Protocol, CSMA/CD, Collisions
The following is a description of the frame format described by the original Ethernet Version II specification as released by DEC, Intel, and Xerox. Like the 802.3 spec, the Version II spec defines a…
Network Fundamentals
A long-long time ago (not long ago in earth time) 100 Mbps was THE technology. 100 Mbps uplinks bundled with ether-channel was the ultimate uplink technology. This was the prevailing technology durin…
TCP - UDP Protocol Analysis
This article covers the UDP protocol. We examine the structure of the UDP header, the protocols that use UDP as a transport plus a lot more. Some common protocols which use UDP are: DNS, TFTP, ARP…
Network Fundamentals
A network is simply a group of two or more Personal Computers linked together. Many types of networks exist, but the most common types of networks are Local-Area Networks (LANs), and Wide-Area Networ…
Cisco Routers
This article will focus on Cisco's routers which can be found in almost any organization due to their popularity and market penetration. Cisco has a number of different routers, amongst them are the…
OpManager - Network Monitoring & Management
As technology evolves, so do our networks. Today's sprawling network infrastructures are intricate ecosystems, demanding more from IT teams than ever before.  Configuration management, complianc…
Cisco Data Center (Nexus/UCS)
The Cisco NX-OS checkpoint feature provides the capability to capture at any time a snapshot (backup) of the Cisco Nexus configuration before making any changes. The captured configura…
Linux - Unix
BIND (Berkely Internet Name Domain) is a popular software for translating domain names into IP addresses and usually found on Linux servers. This article will explain the basic concepts of DNS BIND a…
Windows Servers
Most would remember the days we had to have a CDROM or DVDROM in order to proceed with the installation of an operating system. Today, it is very common installing an operating system direct from an…
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…

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