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www.nmmu.ac.za, Port Elizabethbontany.uwc.ac.za, Cape Townwww.dut.ac.za, Durbanhttp://www.museumsnc.co.za./, Kimberleywww.ru.ac.za, Grahamstownsagrid.ac.za,?brunsvigia.tenet.ac.za, Cape Town

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It is seen that the major contributor to the rise in IPDV is www.museumsnc.co.za, followed by www.dut.ac.za.  The bontany.uwc.ac.zais  is no longer accessible. The other hosts are connected to the South African Tertiary Education Network (TENET). That, in turn, connects directly to ESnet that connects SLAC to the Internet thus avoiding any commodity networks.  ESnet supports the Energy Sciences in the US and is well provisioned. TENET supports tertiary academic and research establishments in South Africa. It is a well provisioned network that is probably lightly loaded on average, thus changes in traffic volumes (e.g. due to lockdown) have little effect.

Both www.museumsnc.co.za and www.dut.ac.za traverse commodity networks after leaving ESnet and are thus less likely to be over-provisioned and more sensitive to unplanned or increases in traffic load. For example, a traceroute for  www.museumsnc.co.za leaves the ESnet network at Sunnyvale near SLAC to join the Equinix network, followed by the PCCW Inc. network, followed by Afrihost in South Africa.

Traceroute from SLAC to www.museumsnc.co.za from SLACs
Wed May  6 12:29:15 2020: executing exec(traceroute -m 30 -q 1 -w 1 -A 154.0.166.162 140)=traceroute 
from 134.79.197.214(www.slac.stanford.edu) to  154.0.166.162(www.museumsnc.co.za) for 134.79.138.4
traceroute to 154.0.166.162 (154.0.166.162), 30 hops max, 140 byte packets
 1  rtr-serv01-02-serv01-dmz-webserv.slac.stanford.edu (134.79.197.131) [AS3671]  0.644 ms
 2  rtr-core1-p2p-serv01-01.slac.stanford.edu (134.79.253.249) [AS3671]  0.568 ms
 3  rtr-fwcore2-trust-p2p-core2.slac.stanford.edu (134.79.254.146) [AS3671]  1.114 ms
 4  rtr-core1-p2p-fwcore1-untrust.slac.stanford.edu (134.79.254.137) [AS3671]  1.346 ms
 5  rtr-border1-7k-p2p-core2.slac.stanford.edu (134.79.252.177) [AS3671]  1.523 ms
 6  rtr-border2-7k-p2p-border1-7k.slac.stanford.edu (192.68.191.214) [AS3671]  1.690 ms
 7  sunn-cr5-ip-p2p-border2-7k.slac.stanford.edu (192.68.191.233) [AS3671]  1.961 ms
 8  sacrcr5-ip-b-sunncr5.es.net (134.55.40.145) [AS293]  4.510 ms #AS = Equinix
 9  pnwgcr5-ip-a-sacrcr5.es.net (134.55.43.21) [AS293]  18.646 ms
10  ge3-0.cr02.sea01.pccwbtn.net (206.81.80.13) [*]  18.886 ms
11  HundredGE0-3-0-0.br02.frf06.pccwbtn.net (63.218.232.33) [AS3491]  162.286 ms #AS=PCCW Global, Inc.
12  telkom.te0-1-0-15.br02.frf06.pccwbtn.net (63.218.233.102) [AS3491]  157.321 ms
13  *
14  *
15  169-1-21-100.ip.afrihost.co.za (169.1.21.100) [AS37611]  338.447 ms #AS=Afrihost (PTY) Ltd
16  gm-colo3-core2-lq.aserv.co.za (169.1.21.187) [AS37611]  317.722 ms