ScienceComputer ScienceComputer SkillsCh 11 Herb
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Ch 11 Herb

Juan Butler avatar Juan Butler
9 September 2022
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27 test answers

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question
What xDSL version provides a maximum throughput of 24 Mbps downstream and 3.3 Mbps upstream?
answer
​ADSL2+M
question
What xDSL standard is the most popular?​
answer
ADSL
question
What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises?​
answer
OC-48
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In a PON system, an OLT contains a splitter that splits each port into how many logical channels?​
answer
32
question
What is the maximum throughput of a DS3 connection?​
answer
​44.736
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What is the maximum amount of throughput provided by an OC-12?​
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​622.08 Mbps
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In an ISDN connection, what is the size throughput did a single B channel provide?​
answer
64 Kbps
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What protocol is commonly used to aggregate / bond T-1 / T-3 lines?
answer
MLPPP
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Which version of DOCSIS provides 38 Mbps per channel and requires a minimum of 4 channels to be used?
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DOCSIS 3
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The DTE or endpoint device for a leased line is known as which device below?
answer
CSU/DSU
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What is the size of an ATM packet?​
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53 bytes
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How many channels exist in a T1 connection?​
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24
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In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?​
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Carrier Ethernet Transport
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In what type of topology is each site connected to two other sites, ​providing redundancy?
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​ring topology
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​What Layer 3 technology is employed by distance-vector routing protocols in which a router knows which of its interfaces a routing update and will not retransmit, or advertise, that same update on the same interface?
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split horizon​
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When copper cabling is used to carry T-1 traffic, what kind of connector is used?
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​RJ-48
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What is the frequency range of the C-band that is used by satellites?
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​3.4 - 6.7 GHz
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​What protocol is commonly used to aggregate / bond T-1 / T-3 lines?
answer
MLPPP
question
​The DTE or endpoint device for a leased line is known as which device below?
answer
CSU/DSU
question
(What is the difference between a DTE and a DCE?)customer' s endpoint device on the WAN is called the
answer
Data Terminal Equipment (DTE)
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(What is the difference between a DTE and a DCE?)carrier' s endpoint device for the WAN is called the
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Data Communications Equipment (DCE).
question
(What is the difference between a DTE and a DCE?)ex 1
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when you connect a home router and a DSL modem to make a DSL connection to an ISP, the router is the DTE and the modem is the DCE. The DTE communicates on the LAN, and the DCE communicates on the WAN. Sometimes the DTE and DCE are combined in the same device.
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(What is the difference between a DTE and a DCE?)DTE is the responsibility of the
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customer
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(What is the difference between a DTE and a DCE?)DCE is the responsibility of the
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ISP
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Which option below is an advantage of leasing a frame relay circuit over leasing a dedicated circuit?
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​You pay only for the bandwidth you've used.
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(What is the difference between a DTE and a DCE?)ex 2
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a router might have one WAN network adapter that connects to a fiber-optic or frame relay WAN and one LAN network adapter that connects to an Ethernet, twisted-pair LAN.
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When using frame relay, what is the name of the identifier that routers use to determine which circuit to send frames to?
answer
data link connection identifier