Three of the following statements are correct. Identify the three (3) correct statements.

A subscriber complains that his DSL rates are slower than the service he
ordered. The customer ordered ADSL at 1 mpbs downstream and 256 kbps upstream, but the maximum bitrate observed during file downloads is 100 kbps downstream. Of the following four choices, which is clearly the most appropriate information needed to begin troubleshooting the problem?

A subscriber’s DSL service is configured as PPPoA. The subscriber’s DSL modem is trained, but the subscriber can not access the internet (can not ping network addresses or reach web servers). Initial troubleshooting shows that a PPP session is open (active) in the DSL modem and aggregator. Based on these conditions and the symptom, what is a possible cause of this problem?

Which three are major inhibitors of ADSL line quality? (multiple answer)

To eliminate the need for adjacent routers on broadcast networks to form n(n-1)/2 adjacencies, IS-IS defines a pseudonode or Designated Intermediate System, DIS. All router on the broadcast medium form an adjacency with the DIS. The Backup DIS is called:

When using IS-IS for IP routing, Dual IS-IS defined by RFC 1195, what is true? (multiple answer)

In DMT DSL transmission systems, what is the effect of turning off half of the available downstream carriers (tones)?

What is true concerning fastpath versus interleaved mode in DMT DSL service?

IDSL and SDSL use what line coding scheme?