http://www.technology-training.co.uk/Article listingsen-usSat, 06 Mar 2010 14:19:29 +0000Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/rss.phpWeblog Editor 2.0info@technology-training.co.uk (Mark Gilliland)info@technology-training.co.uk (Mark Gilliland)http://www.technology-training.co.uk/transportoptionsformetroethernet_57.phpThree main options for delivering an Ethernet service to customers over the last mile are in widespread use. This articles describes the options, and where they might be used...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/transportoptionsformetroethernet_57.phphttp://www.technology-training.co.uk/qualityofserviceversustrafficmanagementinpacketnetworks_56.phpQuality of Service and Traffic Management are related, but different disciplines in packet switched networks, as this brief article explains...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/qualityofserviceversustrafficmanagementinpacketnetworks_56.phphttp://www.technology-training.co.uk/trafficmanagementtechniquesforpacketnetworks_55.phpRegardless of the technology used, certain fundamental traffic management techniques can be applied to optimise utilisation and handle congestion in packet-switched networks... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/trafficmanagementtechniquesforpacketnetworks_55.phphttp://www.technology-training.co.uk/qosstandardsforipnetworksandservices_54.phpThe migration of telecoms networks from circuit switching and ATM to IP poses major challenges for maintaining the QoS necessary for applications such as voice, video and streaming services. This article describes the key ITU-T and 3GPP standards relating to QoS... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/qosstandardsforipnetworksandservices_54.phphttp://www.technology-training.co.uk/protectingcriticalmanagementprotocolsfromattack_53.phpSeveral management protocols widely used in networks have little built-in protection, so they must have additional protection provided to avoid compromise of complete systems...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/protectingcriticalmanagementprotocolsfromattack_53.phphttp://www.technology-training.co.uk/platformhardeningtoimprovesecurity_52.phpAny IT system that is visible to the public, such as a web server or mail server, must be "hardened" to minimise the risk of successful attacks against it. This article outlines some of the key tasks and techniques...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/platformhardeningtoimprovesecurity_52.phphttp://www.technology-training.co.uk/diffiehelmankeyexchange_51.phpThe Diffie-Helman protocol enables two communicators to generate a shared secret value (normally a session key) to be used for secure communications, without ever transmitting this value across a network .Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/diffiehelmankeyexchange_51.phphttp://www.technology-training.co.uk/hashfunctionsandmessagedigests_50.phpHash Functions and Message Digests provide a means of generating a unique "fingerprint" of a message, and are a vital building block in many security protocols...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/hashfunctionsandmessagedigests_50.phphttp://www.technology-training.co.uk/ciscoipaccesslists_49.phpA common implementation of firewall rules in both stateless and stateful models is the use of Access control Lists (ACLs) on Cisco routers. In this article some examples of the Cisco implementation of stateless and stateful firewall rules are examined...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/ciscoipaccesslists_49.phphttp://www.technology-training.co.uk/thearchitectureofsecureshellssh_48.phpAround twelve separate components are included in a server-side implementation of the SSH protocol. The main functions are discussed in this article introducing the functional architecture of SSH. Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/thearchitectureofsecureshellssh_48.phphttp://www.technology-training.co.uk/capabilitiesofthesecureshellprotocol_47.phpRemote logins and console session are often carried out using telnet, rlogin, or similar protocols, which carry user names and passwords as plaintext, and also carry the subsequent session traffic as plaintext. Secure Shell (SSH) protocol provides a simple, flexible and free alternative...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/capabilitiesofthesecureshellprotocol_47.phphttp://www.technology-training.co.uk/europeanunionregulationoftelecoms_46.phpThe EU commissioner has just announced that a year after warnings were issued to service providers concerning high prices for data roaming charges, she intends to apply a similar price cap to these services shortly. Over the last 30 years the EU has become more and more central to telecoms regulation in member states... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/europeanunionregulationoftelecoms_46.phphttp://www.technology-training.co.uk/historyoftelecomsregulationinuk_45.phpTelecoms regulation in the UK began in 1901 with the licencing of private telephone companies, and has gone through nationalisation, privatisation, regulated monopoly and duopoly, convergence with broadcasting and with the Internet, and alignment with EU directives. It continues to adapt as our use of communications changes...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/historyoftelecomsregulationinuk_45.phphttp://www.technology-training.co.uk/standardsforiptvoverdvbh_44.phpThe DVB-H standard is designed to support unicast broadcasting of IP datagrams to handheld devices, including mobile phones... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/standardsforiptvoverdvbh_44.phphttp://www.technology-training.co.uk/competingstandardsformobiletv_43.phpThere are three competing standards for the delivery of TV content and VoD to mobile handsets; DVB-H, DMB, and MediaFLO. All three standards can use the available spectrum being considered and licensed for mobile TV. In addition, MBMS from mobile operators can deliver content using existing 3G network capacity... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/competingstandardsformobiletv_43.phphttp://www.technology-training.co.uk/prestigiadaempresadetelecomunicacionesrequiereinstructoresbilingesespaolingls_42.phpNecesitamos expertos telecom que hablen con fluidez el español y manejen igualmente el inglés para que se unan a nuestro equipo existente sobre una base de contrato...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/prestigiadaempresadetelecomunicacionesrequiereinstructoresbilingesespaolingls_42.phphttp://www.technology-training.co.uk/signallingtransportsigtranusingsctp_41.phpSS7’s stringent requirements on message delivery and timely responses places challenging requirements on transport of SS7 messages over IP. While traditional UDP and TCP lack necessary features, the SCTP transport protocol can fill the gap...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/signallingtransportsigtranusingsctp_41.phphttp://www.technology-training.co.uk/voipstandardscompared_40.php“The best thing about standards is there are so many to choose from”, or so the quote says. This is true of the VoIP standardisation world, and from the mid 90s the standardisation track for media control protocols has been following largely parallel tracks in the ITU-T and IETF...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/voipstandardscompared_40.phphttp://www.technology-training.co.uk/voicequalitymeasurement_39.phpVoIP is vulnerable to poor quality through mechanisms that did not affect traditional circuit-switched, PSTN telephony. Excessive delay, delay variation (jitter) and packet loss can all make the quality of calls to end users unacceptable. Fortunately the means to define and measure voice quality have matured in the last several years....Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/voicequalitymeasurement_39.phphttp://www.technology-training.co.uk/firstpublictelecomstrainingcourseinlisbon_38.phpTechnology Training Limited has scheduled its first ever public telecoms training course for attendees in Portugal, "NGOSS in NGN:Hands-On", 28th - 29th August 2008, to be delivered in English.Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/firstpublictelecomstrainingcourseinlisbon_38.phphttp://www.technology-training.co.uk/ngntelecomsinformationassurance_37.phpWith the deployment of NGN telecoms networks and services, and increased access to alternative providers, additional risks must be managed to ensure telecoms networks remain secure without unnecessary cost to operators or their customers. UK government and the telecoms industry is collaborating to provide this NGN assurance...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/ngntelecomsinformationassurance_37.phphttp://www.technology-training.co.uk/developmentofthe80216wimaxstandards_36.phpThe 802.16 standards for wireless Metropolitan Area Networks (wireless MAN) have been under development throughout the last decade. Consolidation with HyperMAN, formation of the WiMAX Forum, and the introduction of mobility have been key milestones in the standards...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/developmentofthe80216wimaxstandards_36.phphttp://www.technology-training.co.uk/mplsvirtualprivatenetworksvpns_35.phpMPLS VPNs are a key service for telecoms providers to offer across their converged NGN network, and provide a native IP service from a customer perspective...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/mplsvirtualprivatenetworksvpns_35.phphttp://www.technology-training.co.uk/providerbackbonetransportpbt_34.phpProvider Backbone Transport (PBT) is also known as PBB-TE (defined by IEEE 802.1Qay March 2006). It allows virtual circuits to be built across Carrier Ethernet networks...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/providerbackbonetransportpbt_34.phphttp://www.technology-training.co.uk/carrierethernetandproviderbackbonebridging_33.phpThe traditional flat and open addressing structure of Ethernet is unsuitable for use in MAN and WAN networks, where traffic from each customer must be kept separate, and large address spaces are required. Developments in Carrier Ethernet can accommodate this.... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/carrierethernetandproviderbackbonebridging_33.phphttp://www.technology-training.co.uk/evolutionofenterprisearchitecturemodels_32.phpEnterprise Architecture is a discipline that has been strong in the United States of America since the early 80s, and which has developed through different frameworks and gained momentum gradually ever since... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/evolutionofenterprisearchitecturemodels_32.phphttp://www.technology-training.co.uk/introductiontotogaf_31.phpThe Open Group Architecture Framework (TOGAF) is a framework for Enterprise Architecture which provides a comprehensive approach to the design, planning, implementation, and governance of an enterprise information architecture...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/introductiontotogaf_31.phphttp://www.technology-training.co.uk/introductiontoenterprisearchitecture_30.phpOrganisations have begun to look for standard ways to describe and document their processes and systems using Enterprise Architecture frameworks such as Zachman, TOGAF, TEAF, FEAF...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/introductiontoenterprisearchitecture_30.phphttp://www.technology-training.co.uk/operationofhypertexttransferprotocolhttp_29.phpHypertext Transfer Protocol (HTTP) is an application level protocol which is widely used as a means of transferring data on a client/server model between web clients and web servers within the World Wide Web (WWW)...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/operationofhypertexttransferprotocolhttp_29.phphttp://www.technology-training.co.uk/skypesroadmapandarchitecture_28.phpSkype is certainly the most successful of the Internet-based telephony services launched in recent years, if success is defined as numbers of users, acceptance and/or public profile... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/skypesroadmapandarchitecture_28.phphttp://www.technology-training.co.uk/convergenceofmobileandfixedtelcoarchitectures_27.phpThe architectures of mobile networks (through 3GPP) and fixed-line networks (through ETSI TISPAN) have gradually converged over the last decade, heres how...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/convergenceofmobileandfixedtelcoarchitectures_27.phphttp://www.technology-training.co.uk/thetispanngnarchitecture_26.phpThe TISPAN High Level Architecture is closely aligned with that of 3GPP, but adds some elements to replace the inherited GSM components... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/thetispanngnarchitecture_26.phphttp://www.technology-training.co.uk/primercursopblicoenmxico_25.phpTechnology Training Limited ha programado por vez primera su primer curso público para asistentes en México y de Centroamérica , "Introducción a NGOSS en NGN", 2-3 Julio 2008Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/primercursopblicoenmxico_25.phphttp://www.technology-training.co.uk/firstpubliccourseinmexico_24.phpTechnology Training Limited has scheduled its first ever public course for attendees in Mexico and from Central America, "Introduction to NGOSS in NGN", 2-3 July 2008, to be delivered in Spanish.Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/firstpubliccourseinmexico_24.phphttp://www.technology-training.co.uk/understandingofcomspectrummanagement_22.phpThis article explains how Ofcom have managed spectrum in the UK market, and their immediate plans and principles for further use...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandingofcomspectrummanagement_22.phphttp://www.technology-training.co.uk/ukandeuregulationofvoice_21.phpThe last 10 years has seen numerous battles over the rights and obligations of VoIP providers. This articles outlines how the UK and EU regulators have changed their position over that period...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/ukandeuregulationofvoice_21.phphttp://www.technology-training.co.uk/understandingipv4subnets_19.phpA brief article explaining with examples how the mask can be used with IPv4 addresses to create subnets from classful addresses...coming soon...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandingipv4subnets_19.phphttp://www.technology-training.co.uk/understandingclasslessinterdomainroutingcidr_18.phpAn example of Classless Inter-domain Routing (CIDR), showing how the address allocations for different-sized address block down to the individual IP address is implemented Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandingclasslessinterdomainroutingcidr_18.phphttp://www.technology-training.co.uk/understandinginternetregistries_17.phpThe move from classful address assignment to classless assignment through Regional Internet Registries (RIR) and Local Internet Registries (LIR), and why it was necessary...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandinginternetregistries_17.phphttp://www.technology-training.co.uk/theroleofenuminngns_16.phpWhen PSTN callers wish to contact NGN subscribers, they cannot directly dial their NGN address; instead the network must be able to map between E.164 addresses and NGN addresses. ENUM facilitates this... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/theroleofenuminngns_16.phphttp://www.technology-training.co.uk/consultancyforlargecountycouncil_15.phpCase study of our consultancy assignment for a large council....coming soonSat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/consultancyforlargecountycouncil_15.phphttp://www.technology-training.co.uk/trainingmatchedtothebusinessneedfortelcos_14.phpConventional technical training for telcos focuses on the network; but often the real training need is to address the whole vertical stack used by the business: Networks, OSS/BSS, Process and Organisation...,Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/trainingmatchedtothebusinessneedfortelcos_14.phphttp://www.technology-training.co.uk/understandingipv4addressing_11.phpUnderstanding IPv4 address formats, address classes, masks and reserved addresses is a tricky but essential skill for just about anyone dealing with IP networks or services...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandingipv4addressing_11.phphttp://www.technology-training.co.uk/understandingtheiso7layermodel_10.phpThe functions of the layers in the ISO 7-layer model explained, as well as the different ways in which they can be viewed, and the relationship to TCP/IP...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/understandingtheiso7layermodel_10.phphttp://www.technology-training.co.uk/theshiftfromtelcotoictprovider_9.phpUbiquitous IP means applications can potentially be unified end-to-end. There are early but compelling signs that this is finally happening, and huge implications for the telecommunications, media and computing industries...coming soon...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/theshiftfromtelcotoictprovider_9.phphttp://www.technology-training.co.uk/nextgenerationnetworksngn_8.phpNext Generation Networks (NGN) are being implemented globally as a means to radically change the cost base, agility and service capabilities of telecoms providers: key enabling technologies include IP, MPLS, ADSL, Metro-Ethernet, SIP and H.248...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/nextgenerationnetworksngn_8.phphttp://www.technology-training.co.uk/nextgenerationaccessnga_7.phpNext Generation Access (NGA) increases the bandwidth of telecoms access networks to match the capabilities of the NGN core and distribution layers using fibre or wireless technologies. This articles explores the motivation for NGA, the key technologies, and the positions adopted by government, regulators and operators... Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/nextgenerationaccessnga_7.phphttp://www.technology-training.co.uk/developmentoftheinternet_6.phpHow has the Internet developed from a small-scale research network at DARPA through to its dominant position in Enterprise and Telecoms networks and services...Sat, 06 Mar 2010 14:19:29 +0000http://www.technology-training.co.uk/developmentoftheinternet_6.php