Post Views: 2,018 Security of your network is paramount in today’s network centric society. With security breaches increasing in complexity and diversity, assessing the potential security risk and exposure of your corporate assets is vital to management teams. Who should consider us? Our assessment service is targeted at the rural service provider community. Our deep […]
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Post Views: 22,205 The following is a detailed explanation regarding our NetSci Certification Program Version 2, targeted to Field Operations and Central Office Operations technical staff, and how it works at the Online School of Network Sciences. You can read more at the Online School right here. If you are interested in the CSR (Customer
CSI-SP-TECH-CERT Technician Certification Program Read More »
Post Views: 4,163 What exactly is the purpose of the IP ID field? This is actually a great question. While many have tried to answer the question in various articles on the Internet, I thought the question deserved a clear answer to the question. RFC 6864 updated RFC’s 791, 1122, and 2003 to clarify the
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Post Views: 1,574 This question (really two questions) has been popping up quite a bit lately. Let me see if I can explain. First, let’s define what SD-WAN is. SD-WAN leverages the SDN concept of separating the control plane from the data plane and creating a controller running software that can enact control and policies
What is SD-WAN? Does it replace MPLS? Read More »
Post Views: 1,324 That’s right! ARIN formally announced today that IPv4 Adresses are gone – gone – gone in North America: That means that everyone is down to whatever they have. It also means that if your organization is not prepped to convert to IPv6 with a solid plan, it ought to be! Plus you
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Post Views: 1,969 OSPF (Open Shortest Path First) is an IGP (internal gateway protocol), and OSPF is an open standard protocol originally defined in RFC 2328. Since then OSPF has been updated numerous times including functionality to support IPv6 and Address Families. OSPF is supported on every major routing platform as well as Windows Server
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Post Views: 1,534 IP mobility is software and hardware designed to provide network access as a user travels from network to network. Cisco calls this the ubiquitous connection. Cellular telephone networks already accomplish this: You can begin a cellular call in Los Angeles, CA and (in theory) you should be able to drive to New
IP Mobility Primer in Cisco IOS Read More »
Post Views: 6,039 For those of you who love Wireshark and are needing to analyze DNS Queries and Responses, we have the profile for you. Profiles are one of the most important Wireshark capabilities. Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our
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Post Views: 1,558 A common question folks ask is “How do you check the bandwidth utilization on a router?” It is a great question and the answer is not as easy as you would expect. There are tools that accomplish this (i.e. NetFlow and there is another mentioned at the end of this page). However,
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Post Views: 1,181 The Border Gateway Protocol (BGP) allows internal and external networks or autonomous systems (AS’s) to exchange routes. BGP is a path-vector routing protocol, which simply means that its job is to exchange routing information between autonomous systems to find the most efficient path for your data to the Internet. Each BGP router
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Post Views: 11,853 In my prior article on getting started with nmap, I showed you how to get started with this superb network scanner. In that article we did basic scans to locate what hosts were on a given network and display what services were running on those hosts. In this article I am going
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Post Views: 1,456 In the prior articles (Getting Started with nmap and Deeper Scanning with nmap), we showed you how to get started, and how to dive deeper with this superb network scanner. Let’s go even deeper! One of the cool things nmap has is the ability to create scripts. Now doing this from
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