Read the paper. The first sentence of the introduction is:
...
Read the paper. The paragraph is in the introduction.
Do you think that if something is written in the paper or on the class slides it makes it immediately valid and sound ?
if you want redundant multicast or anycast service, there
should be multiple multicast or anycast addresses offering
the same service, from which, applications choose the working
ones.
Please read the wikipedia:
"Anycast is a network addressing and routing methodology in which a single destination address has multiple routing paths to two or more endpoint destinations. Routers will select the desired path on the basis of number of hops, distance, lowest cost, latency measurements or based on the least congested route. Anycast networks are widely used for content delivery network (CDN) products to bring their content closer to the end user."
And IP anycast is used far much broader and wider then just for DNS root servers.
Thx,
R.
