Network+ Chapter 11

9 September 2022
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Layer 3
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What is the lowest layer of the OSI model at which LANs and WANs support the same protocols?
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Dedicated line, virtual circuit
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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.
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Mesh topology
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Which WAN topology always sends data directly from its origin to its destination?
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MLP
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What protocol is used to bond multiple T-1s?
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Smart jack
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What kind of device can monitor a connection at the demarc but cannot interpret data?
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DOCSIS
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What specification defined the standards for broadband cable?
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Ethernet over power line
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What technology allows a user to access the Internet through the wiring of a home?
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OC levels, digital signal levels
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______________ in SONET are analogous to the ________________ of T-carriers.
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802.16
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What IEEE committee established WiMAX technologies?
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Throttling
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What method do ISPs use to purposely slow down bandwidth utilization by customers?
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​ring topology
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In what type of topology is each site connected to two other sites, ​providing redundancy?
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​44.736
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What is the maximum throughput of a DS3 connection?​
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24
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How many channels exist in a T1 connection?​
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​64 Kbps
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In an ISDN connection, what is the size throughput did a single B channel provide?​
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​32
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In a PON system, an OLT contains a splitter that splits each port into how many logical channels?​
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​53 bytes
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What is the size of an ATM packet?​
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​You pay only for the bandwidth you've used.
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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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​ADSL
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What xDSL standard is the most popular?​
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​ADSL
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What version of xDSL is the most popular?​
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​CSU/DSU
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​The DTE or endpoint device for a leased line is known as which device below?
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​OC-48
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What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises?​
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​622.08 Mbps
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What is the maximum amount of throughput provided by an OC-12?​
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​3.4 - 6.7 GHz
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​What is the frequency range of the C-band that is used by satellites?
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split horizon​
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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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​MLPPP
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​What protocol is commonly used to aggregate / bond T-1 / T-3 lines?
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​RJ-48
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When copper cabling is used to carry T-1 traffic, what kind of connector is used?
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​data link connection identifier
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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?
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​DOCSIS 3
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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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​1/4 mile
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​The best 802.11n signal can travel approximately how far?
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​Carrier Ethernet Transport
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In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?​