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TERENA compendium of national research and education networks in europe/network3.5 External Connectivity: Total External LinksNRENs were asked to list all of their external connections in January 2006.The Nordic NRENs (Funet of Finland, RHnet of Iceland, SUNET of Sweden,UNINETT of Norway and UNI•C [Forskningsneet] of Denmark) sharetheir external connections through NORDUnet. What is listed in the graphsis the connection of the individual NRENs to NORDUnet. In addition,their other connections (peerings, connections to the commercial Internet)have been listed. For more information about the external connections ofNORDUnet, see hp://www.nordu.net/maps/map_nordunet.png.In the graph, GÉANT/NORDUnet also contains the connections to GÉANTvia the SEEREN and EUMEDCONNECT projects as well as connections toGÉANT based on bilateral agreements (BASNET, RENAM). Note that someNRENs connect to the wider Internet through the DANTE World Service,which makes use of the GÉANT network.‘Other Research’ includes links to other NRENs, the links of several CentralAsian NRENs to DFN via the Silk Highway project and connections toCERN, Starlight and similar.A peering is an exchange of IP routes in order to optimise traffic 3 . Oen,traffic is exchanged, although no money changes hands. In some cases,restrictions may apply to such traffic.The ‘Others’ category is used for connections with commercial ISPs.For presentational purposes, four graphs are presented.423See for example hp://whatis.techtarget.com
TERENA compendium of national research and education networks in europe/networkGraph 3.5.1 Division of External Connectivity over the Categories, January 2006100%80%60%40%20%0%ANAAzNetGRENAURANRENAMCSCBASNETMARWANMARNetJUNETPeeringsEUNCyNetAMERJIST FoundationRHnetLITNETIUCCEEnetRESTENARoEduNetCARNetLATNETULAKBIMARNESGRNETRBNet/RUNNetHEAnetUNINETTFunetUNI•CRedIrisBELNETACOnetDFNSUNETSANETNIIF/HUNGARNETSWITCHGARRPIONIERCESNETRENATERUKERNASURFnetOthersOther researchGÉANT/NORDUnet43
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