Wednesday, October 30, 2019

Principles of Communications - week 4/L7 1/11/2019

This week sees us wrapping up bgp and multicast routing  -note on course web page, I list books including an online chapter of a good book on interdomain routing by Hari Balakrishnan from MIT.

5/11/2019 will be last bit on routing - taking in random routing (we're talking telephone numbers)!

Thursday, October 24, 2019

Principles of Communications - week3/L5 24/10/2019

On BGP, traffic engineering tricks - next week, stable paths problem/formulation plus performance;
subsequently, multicast and telephone routing!

meanwhile, do not forget that the clocks go back on sunday - here's a brilliant computerphile exposition on timezones

Friday, October 18, 2019

Principles of Communications - week 2/L3 17/10/2019

we're now just starting interdomain routing, having dealt with centralised/hybrid distributed routing.
next week, see BGP attributed, decision/alg, and model/performance

Thursday, October 10, 2019

Principles of Communications - week 1/L1 10/10/2019

Aside from a visit from the Amicus Curiae (friend of the supreme court judge:),
L1 started with intro to routing. Refer people to last year's network course, and the lectures on the network.

Slide 3 has a network graph with nodes numbered 1-12, and a routing table for node 1. This is a confusing picture as it has [] against some of the entries (both for some next hops, and some destinations) so a) its a forwarding table, not a routing table; and b) it is showing the outcome of some computation - As far as I can recall, the [] represent where the SPF algo tie broke between two routes. - It is a useful exercise to work through in any case.  On asking the original author of the graph (see his book for the non power point version), they're artefacts/noise and don't actually signify:-)