1. What is the lowest layer of the OSI model at which LANS and WANS support...

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1. What is the lowest layer of the OSI model at which LANS and WANS support the same protocols? A. Layer 2 B. Layer 3 C. Layer 4 D. Layer 5 2. What kind of device can monitor a connection at the demarc but cannot interpret data? A. CSU/DSU B. NID NIU C. D. Smart jack 3. What kind of network is the PSTN? 4. A. Packet-switched B. Circuit-switched C. Virtual circuit D. Dedicated line How many channels are in an ISDN PRI connection? A. 2B+D B. 2D+B C. 23D+B D. 23B+D 5. Which DSL standard has the fastest speeds immediately outside the CO? A. VDSL B. ADSL C. SDSL D. ADSL2+ tinal ice to conarate data on a channel? 1. What is the lowest layer of the OSI model at which LANS and WANS support the same protocols? A. Layer 2 B. Layer 3 C. Layer 4 D. Layer 5 2. What kind of device can monitor a connection at the demarc but cannot interpret data? A. CSU/DSU B. NID NIU C. D. Smart jack 3. What kind of network is the PSTN? 4. A. Packet-switched B. Circuit-switched C. Virtual circuit D. Dedicated line How many channels are in an ISDN PRI connection? A. 2B+D B. 2D+B C. 23D+B D. 23B+D 5. Which DSL standard has the fastest speeds immediately outside the CO? A. VDSL B. ADSL C. SDSL D. ADSL2+ tinal ice to conarate data on a channel?

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Answer 1 B Layer 3 2 A CSUDSU 3 B Circuitswitched 4 C 23DB 5 A VDSL Explanation 1 Layer 3 Layer 3 of the OSI model is the network layer which is respo... View the full answer