Network+ Guide To Networks - Chapter 12 Flash Cards

9 September 2022
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question
A fractional T1's bandwidth can be leased multiples of what data rate?
answer
64 Kbps
question
What is a data-link connection identifier (DLCI) utilized for?
answer
It is used by routers to determine which circuit to forward a frame to in a frame relay network
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Where are MPLS labels placed within a frame?
answer
Between the layer 2 and the layer 3 header
question
What layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?
answer
SONET (Synchronous Optical Network)
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What does ATM (Asynchronous Transfer Mode) provide?
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ATM can provide 4 levels of QoS, from best effort delivery to guaranteed, real-time transmission
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When using DOCSIS 3.0, what is the minimum number of channels that can be used?
answer
4
question
What SONET OC level is a popular choice for large businesses, and is equivalent to 100 T1s?
answer
OC-3
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With a SIP trunk, what is the only limitation on the number of calls that can run at any one time?
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The amount of available bandwidth
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T or F: The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme.
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True
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T or F: DSL services require many subscribers to share the same local line, causing potential security concerns.
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False
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T or F: Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs.
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True
question
In North America, what ISDN connection type used two B channels and one D channel?
answer
Basic Rate Interface (BRI)
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Multiplexing enables a single T1 circuit to carry how many channels?
answer
24
question
The DTE or endpoint device for a leased line is known as what?
answer
CSU/DSU
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In a cellular network, where does each wireless base station connect to?
answer
They connect to a mobile switching center
question
Of all the DSL standards, which is the most commonly in use today?
answer
ADSL
question
The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels?
answer
Time Division Multiplexing (TDM)
question
Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate?
answer
The packets are coded such that individual calls can be distinguished
question
In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?
answer
Carrier Ethernet Transport
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On an ATM network, how is the path that data will take determined?
answer
Switches determine the optimal path between sender and receiver, and then establish the path before transmission
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T or F: CDMA (Code Division Multiple Access) is an open standard that is accepted and used worldwide.
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False
question
What is an advantage of leasing a frame relay circuit over leasing a dedicated circuit?
answer
You pay only for the bandwidth you require
question
The Global System for Mobile Communications (GSM) utilizes what technology to create timeslots on a channel?
answer
Time Division Multiple Access (TDMA)
question
What is the maximum throughput of a DS3 connection?
answer
44.736 Mbps
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T or F: An 802.11ac signal can travel for approximately 2 miles from the source.
answer
False
question
In a public switched telephone network, what portion of the network is known as the local loop?
answer
It is the portion that connects any residence or business to the nearest central office
question
The C-Band utilized by satellites consists of what frequency range?
answer
3.4 - 6.7GHz
question
When using satellite services for your WAN connection, what statement is accurate?
answer
Satellite services suffer more latency and jitter issues
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T or F: WANs connect nodes, such as workstations, servers, printers, and other devices, in a small geographical area on a single network.
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False
question
What is the size of an ATM cell, including the header?
answer
53 bytes
question
What type of virtual circuit allows connections to be established when parties need to transmit, then terminated after the transmission is complete?
answer
Switched Virtual Circuit (SVC)
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T or F: DSL signals travel over telephone lines using the 300 to 3300 Hz frequency range.
answer
False
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T or F: In a public switched telephone network, lines are terminated at the central office.
answer
True
question
What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises?ā€‹
answer
OC-48
question
Which type of DSL technology has equal download and upload speeds maxing out at around 2 Mbps?
answer
SDSL
question
In an ISDN connection, what amount of throughput did a single B channel provide?
answer
64 Kbps
question
How many transponders are contained within a typical satellite?
answer
24 to 32
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T or F: Most satellites circle the Earth 22,300 miles above the equator in a geosynchronous orbit.
answer
True
question
T or F: In a frame relay WAN, the ISP typically has the data circuit terminating equipment (DCE).
answer
True
question
Which statement regarding the use of cable modems is NOT accurate? A. Cable broadband provides a dedicated and continuous connection. B. Modems that utilize the DOCSIS 3.0 or 3.1 standards are backward compatible with older DOCSIS networks. C. DOCSIS 3.1 allows for full duplex speeds up to 10 Gbps. D. Cable modems only operate at the Physical Layer of the OSI model.
answer
D. Cable modems only operate at the Physical Layer of the OSI model.
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TDM
answer
Time Division Multiplexing
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ATM
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Asynchronous Transfer Mode
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DTE
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Data Terminal Equipment
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ADSL
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Asymmetric Digital Subscriber Line
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SDSL
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Symmetrical Digital Subscriber Line
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SONET
answer
Synchronous Optical Network
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CDMA
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Code Division Multiple Access
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GSM
answer
Global System for Mobile Communications
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TDMA
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Time Division Multiple Access
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DVC
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Dynamic Virtual Circuit
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SVC
answer
Switched Virtual Circuit
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DCE equipment
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Data Circuit Terminating Equipment
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DLCI
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Data Link Connection Identifier
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MPLS
answer
Multi-Protocol Label Switching
question
The data rate of a particular SONET ring is indicated by its ____, a rating that is internationally recognized by networking professionals and standards organizations.
answer
OC level