Polling and addressing of the cluster controllers was performed by the NCP without mainframe intervention.
2.
The original IBM Network Control Program ran on the SDLC links to remote cluster controllers ( PU1 / PU2 ) or to other PU4s.
3.
IaaS service components Cloud Controller, Cluster Controller, Walrus, Storage Controller, and VMware Broker are configurable as redundant systems that are resilient to multiple types of failures.
4.
RG-62 is a 93 ? coaxial cable originally used in mainframe computer networks in the 1970s and early 1980s ( it was the cable used to connect IBM 3270 terminals to IBM 3274 / 3174 terminal cluster controllers ).
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