Chapter 5b - Department of Information Technology
... protocol (not just IP) at same time ability to demultiplex upwards bit transparency: must carry any bit pattern in the data field error detection (no correction) connection liveness: detect, signal link failure to network layer network layer address negotiation: endpoint can learn/configure each o ...
... protocol (not just IP) at same time ability to demultiplex upwards bit transparency: must carry any bit pattern in the data field error detection (no correction) connection liveness: detect, signal link failure to network layer network layer address negotiation: endpoint can learn/configure each o ...
Presented
... What’s wrong with existing technology? Proliferation of trust • Switches and routers must correctly export link state, calculate routes and perform filtering • Overtime these functions have become more complex leading to more vulnerabilities. • SANE proposed to replace this with simple, minimally t ...
... What’s wrong with existing technology? Proliferation of trust • Switches and routers must correctly export link state, calculate routes and perform filtering • Overtime these functions have become more complex leading to more vulnerabilities. • SANE proposed to replace this with simple, minimally t ...
Chapter 4: Switched Networks
... The trend in networks is towards convergence using a single set of wires and devices to handle voice, video, and data transmission. There has been a dramatic shift in the way businesses operate. There are no physical offices or geographic boundaries constraints. Resources must now be seamlessl ...
... The trend in networks is towards convergence using a single set of wires and devices to handle voice, video, and data transmission. There has been a dramatic shift in the way businesses operate. There are no physical offices or geographic boundaries constraints. Resources must now be seamlessl ...
Nonblocking minimal spanning switch
A nonblocking minimal spanning switch is a device that can connect N inputs to N outputs in any combination. The most familiar use of switches of this type is in a telephone exchange. The term ""non-blocking"" means that if it is not defective, it can always make the connection. The term ""minimal"" means that it has the fewest possible components, and therefore the minimal expense.Historically, in telephone switches, connections between callers were arranged with large, expensive banks of electromechanical relays, Strowger switches. The basic mathematical property of Strowger switches is that for each input to the switch, there is exactly one output. Much of the mathematical switching circuit theory attempts to use this property to reduce the total number of switches needed to connect a combination of inputs to a combination of outputs.In the 1940s and 1950s, engineers in Bell Laboratories began an extended series of mathematical investigations into methods for reducing the size and expense of the ""switched fabric"" needed to implement a telephone exchange. One early, successful mathematical analysis was performed by Charles Clos (French pronunciation: [ʃaʁl Cləʊ]), and a switched fabric constructed of smaller switches is called a Clos network.