Ingeniería informatica Redes Tema 14
1 The largest portion of the bandwidth for ADSL carries _______.
2 Another name for the cable TV office is the _______.
3 A traditional cable TV network transmits signals ______.
4 The original telephone network, which is referred to as the plain old telephone system (POTS), was a (an) ________ system.
5 The traditional cable TV system used ________cable end to end.
6 The second generation of cable networks is called a(n) _________ network.
7 The HFC network uses _______ cable.
8 To use a cable network for data transmission, we need two key devices: a ______ and a _________
9 A (An) ______ signal is the corresponding optical signals of an electrical signal level STS-n.
10 SONET uses _______ TDM multiplexing.
11 A SONET system can use _________.
12 SONET sends ________ frames per second.
13 In SONET, __________ allow insertion and extraction of signals.
14 In SONET, for each byte, the bits are transmitted ____________.
15 ________ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T.
16 The ATM standard defines ______ layers.
17 An ATM data unit is a cell composed of ______ bytes.
18 In ATM, a(n) ______ is the interface between a user and an ATM switch.
19 In ATM, a(n) _________ is the interface between two ATM switches.
20 In ATM, the _______layer accepts transmissions from upper-layer services and maps them into cells.
21 In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services.
22 In SONET, a ________ is a repeater.
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