Homework2
- 1. How Circuit-Switched Digital Networks Work ● Simple explanation of circuit-switched network ● Central office switch and router ● Fiber-optic link ● The works of the routers
- 2. Simple explanation of circuit- switched network ● In the data communication, it is the system that the line is kept in the device is connecting to another. ● The line is liberated when the connection between the devices finishes. ● If there are no data, this system occupies the line. So the efficiency of the network is very bad. This is the demerit.
- 3. Central office switch and router ● The telephone office in the telephone company of all locals is a switch that computerizes as operation with other similar switches of which the term circuit switching that sends the one of call, that, and completes comes.
- 4. Fiber-optic link ● The central office switch accepts the incoming call and makes a digital connection to the destination. ● A high-speed intraswitch trunk is a fiber-optic link operating at a minimum of 45 megabits per second.
- 5. The works of the routers ● Destination router To sense the incoming call and make a connection to the LAN. ● Originating router To strip off the Ethernet data and send TCP/IP packets across the LAN-to -LAN. Receiving router ● To package TCP/IP packets into Ethernet.
- 6. References ● Wikipedia http://www.wikipedia.org/ ● The digital terminological dictionary (Japanese Web site) http://yougo.ascii.jp/caltar/