Network+ Chapter 11

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Layer 3

What is the lowest layer of the OSI model at which LANs and WANs support the same protocols?

Dedicated line, virtual circuit

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.

Mesh topology

Which WAN topology always sends data directly from its origin to its destination?


What protocol is used to bond multiple T-1s?

Smart jack

What kind of device can monitor a connection at the demarc but cannot interpret data?


What specification defined the standards for broadband cable?

Ethernet over power line

What technology allows a user to access the Internet through the wiring of a home?

OC levels, digital signal levels

______________ in SONET are analogous to the ________________ of T-carriers.


What IEEE committee established WiMAX technologies?


What method do ISPs use to purposely slow down bandwidth utilization by customers?

​ring topology

In what type of topology is each site connected to two other sites, ​providing redundancy?


What is the maximum throughput of a DS3 connection?​


How many channels exist in a T1 connection?​

​64 Kbps

In an ISDN connection, what is the size throughput did a single B channel provide?​


In a PON system, an OLT contains a splitter that splits each port into how many logical channels?​

​-53 bytes

What is the size of an ATM packet?​

​-You pay only for the bandwidth you’ve used.

Which option below is an advantage of leasing a frame relay circuit over leasing a dedicated circuit?


What xDSL standard is the most popular?​


What version of xDSL is the most popular?​


​The DTE or endpoint device for a leased line is known as which device below?


What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises?​

​-622.08 Mbps

What is the maximum amount of throughput provided by an OC-12?​

– 3.4 – 6.7 GHz

​What is the frequency range of the C-band that is used by satellites?

-split horizon​

​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?


​What protocol is commonly used to aggregate / bond T-1 / T-3 lines?


When copper cabling is used to carry T-1 traffic, what kind of connector is used?

​-data link connection identifier

​When using frame relay, what is the name of the identifier that routers use to determine which circuit to send frames to?


​Which version of DOCSIS provides 38 Mbps per channel and requires a minimum of 4 channels to be used?

​-1/4 mile

​The best 802.11n signal can travel approximately how far?

​-Carrier Ethernet Transport

In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?​

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