Which DSL standard has the fastest speeds immediately outside the CO? |
VDSL |
How many channels are in an ISDN PRI connection? |
23B+D |
What kind of network is the PSTN? |
Circuit-switched |
What kind of device can monitor a connection at the demarc but cannot interpret data? |
Smart jack |
Where does an MPLS label go in a PDU? |
Between Layers 2 and 3 |
What is the lowest layer of the OSI model at which LANs and WANs support the same protocols? |
Layer 3 |
______________ in SONET are analogous to the ________________ of T-carriers. |
OC levels, digital signal levels |
What specifications define the standards for cable broadband? |
DOCSIS |
An organization can lease a private _________________ that is not shared with other users, or a _________________ that can be physically configured over shared lines in the carrier’s cloud. |
dedicated line, virtual circuit |
What method does a GSM network use to separate data on a channel? |
TDMA |
Unit 12
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