Deck 8: ATM Technologies

Question 1

If the LAN that connects to an ATM WAN is not using ATM locally, then an ATM switch or interface is installed between the LAN and WAN to convert the packets to cells for transmission.

Answer 1

True

Question 2

The development of ATM was started by ____.

A)IBM
B)Bell Labs
C)Microsoft
D)Northern Telecom

Answer 2

B

Question 3

The figure above is an example of network interworking.

Answer 3

False

Question 4

PVCs have the advantage of not needing any manual intervention by the network administrator.

Question 5

LANE operates at Layer 3 of the OSI model.

Question 6

In service interworking the ATM end node between the frame relay and the ATM network does not significantly change the encapsulation of the frame relay frame.

Question 7

ATM continues to have a strong base as a ____ technology.

A)LAN
B)MAN
C)WAN
D)Both A and C.

Question 8

End nodes in an ATM network share bandwidth.

Question 9

ATM employs a four-layer architecture, called the ATM System Model, which enables multiple services to function at the same time on a single network.

Question 10

Latency is the amount of time it takes for the switch to process and forward a cell.

Question 11

The ATM cell header contains the VPI, which is the part of the routing address that identifies the link formed by a virtual path.

Question 12

The ATM communications over SONET are good because the ATM's use of virtual circuits and TDM is very compatible with SONET's virtual tributary structure and switching techniques.

Question 13

Large multi-LAN segment designs require the implementation of multiple ATM switches on the backbone.

Question 14

ATM grew out of broadband ISDN .

Question 15

The ATM layer establishes the link between the node generating the data stream and the AAL.

Question 16

The M in PMD stands for multiple .

Question 17

One of the disadvantages of a PVC is that the circuit must be created and maintained manually.

Question 18

Cells, like packets, carry a fixed-length data payload.

Question 19

ATM is able to transport a wide range of information transmissions at high speeds by dividing data into equal-sized cells and attaching a header to ensure that each cell is routed to its destination.

Question 20

With ATM, information is transmitted in packets .

Question 21

ATM physical links do not operate over ____ cable.

A)Category 2
B)Category 5 UTP
C)STP
D)coaxial

Question 22

The Transmission Convergence sublayer does not ____.

A)process incoming bit-streamed cells
B)handle transmission speed variance at the physical interface and on the ATM layer
C)accommodate the transmission media and the different interface speeds associated with the media
D)None of the above.

Question 23

ATM was originally designed for use in ____.

A)LANs
B)MANs
C)WANs
D)Both A and C.

Question 24

The ____ layer converts the cell stream into transportable bits.

A)ATM
B)Physical
C)ATM Services
D)ATM Adaptation

Question 25

The ____ layer is responsible for the segmentation and reassembly of data into and out of the ATM cell format.

A)ATM
B)Physical
C)ATM Services
D)ATM Adaptation

Question 26

Service ____ is used for local ATM traffic.

A)Class A
B)Class B
C)Class C
D)Class D

Question 27

Like some other WAN technologies, ATM uses virtual circuits, which are called ____.

A)cells
B)conduits
C)channels
D)methods

Question 28

The TC and PMD sublayers are found in the ____ layer.

A)ATM
B)Physical
C)ATM Services
D)ATM Adaptation

Question 29

For constant bit-rate service for connection-oriented voice and video, you use the ____ service type.

A)AAL Type 1
B)AAL Type 2
C)AAL Type 3/4
D)AAL Type 5

Question 30

ATM virtual circuit speeds can be up to ____.

A)10 Gbps
B)50 Mbps
C)2.4 Gbps
D)622.08 Mbps

Question 31

The communications over ATM virtual circuits are accomplished by using ____.

A)cell switching
B)converging
C)packet simulation
D)cell emulation

Question 32

The ____ works to make sure that the ATM standards are fully compatible with the transport of IP.

A)IETF
B)Frame Relay Forum
C)SMDS SIG
D)IEEE

Question 33

Which type of traffic has the highest tolerance for delay?

A)file transfer
B)real-time video
C)voice
D)interactive still image

Question 34

The ____ layer ensures that the different traffic types, such as voice, video, and data, are assigned the correct QoS level.

A)ATM
B)Physical
C)ATM Services
D)ATM Adaptation

Question 35

ATM is not compatible with ____.

A)SONET
B)FDDI
C)DSL
D)None of the above.

Question 36

____ is a virtual circuit based on available bandwidth that does not guarantee data delivery in a timely manner but does ensure against data loss.

A)Constant bit-rate service
B)Variable bit-rate service
C)Unspecified bit-rate service
D)Available bit-rate service

Question 37

The ____ layer ensures the QoS of a virtual circuit or channel and determines error-control techniques.

A)ATM
B)Physical
C)ATM Services
D)ATM Adaptation

Question 38

The ____ layer is roughly equivalent to the OSI Data Link Layer.

A)ATM
B)ATM Adaptation
C)ATM Services
D)Both A and B.

Question 39

The ____ is not a contributor to ATM.

A)IETF
B)Frame Relay Forum
C)SMDS SIG
D)IEEE

Question 40

Service ____ is used for voice and real-time video.

A)Class A
B)Class B
C)Class C
D)Class D

Question 41

An edge device, which is an MPOA component, is another name for a ____.

A)client
B)host
C)LES
D)LECS

Question 42

For the ____ attribute, accuracy is important and cell loss requires retransmission and lower throughput.

A)interactive point of sale
B)real-time video
C)voice
D)file transfer

Question 43

A(n)____ UNI is an interface between an endpoint device and a private network switch.

A)local
B)single
C)switched
D)private

Question 44

Which is not true about the LEC software?

A)Its main function is to map MAC addresses to ATM addresses for address resolution.
B)It can be deployed in the LAN-to-ATM conversion device or as part of the software that resides in the ATM-attached device.
C)It is implemented on three logical servers.
D)None of the above.

Question 45

The most popular use of ATM in LAN environments is as a backbone network.

Question 46

Which is not true about ATM switches?

A)The ATM switch waits for the entire cell to be processed before beginning the switching process.
B)The switch performs a limited amount of error checking.
C)The connection between two ATM switches is shared over one medium that is divided into multiple virtual circuits to transport cells along each circuit.
D)None of the above.

Question 47

In ATM, like Ethernet and token ring networks, all connected devices see all network traffic.

Question 48

The same VPI/VCI may be reassigned at each ATM switch.

Question 49

A value of zero in the Cell Loss Priority field in an ATM header indicates that the cell has high priority and cannot be dropped.

Question 50

The ATM Group is a consortium of hardware vendors, telecommunications service providers, and users who work with the ITU-T on specifications for LAN and WAN applications of ATM.

Question 51

Which MPOA component performs the MPOA processes for sending and replying to MPOA requests, identifying network flows, and establishing shortcuts?

A)client
B)host
C)LES
D)LECS

Question 52

The ATM cell structure transports voice better than video and data.

Question 53

For desktop applications, there are currently ATM specifications for ____ transfer rates.

A)25.6-Mbps
B)51.84-Mbps
C)72.83-Mbps
D)Both A and B.

Question 54

You could use a(n)____ to connect an ATM switch and a legacy LAN.

A)chassis hub
B)repeater
C)passive hub
D)DLS gateway

Question 55

Which MPOA component acts as the registration server for MPOA-capable clients?

A)client
B)host
C)LES
D)LECS

Question 56

For the voice attribute, the ATM throughput can be described as ____.

A)bursty
B)a consistent transfer rate
C)short bursts with predictable idle times
D)short bursts with unpredictable idle times

Question 57

Which is not true?

A)Classical IP over ATM is a more complex implementation than LANE.
B)Classical IP over ATM generates less network overhead than LANE.
C)Classical IP over ATM requires any device with a legacy LAN connection to pass through a router to reach a destination device.
D)None of the above.

Question 58

A(n)____ creates an ATM WAN.

A)private NNI
B)public NNI
C)local NNI
D)global NNI

Question 59

An ATM cell has ____ bytes of payload information.

A)5
B)48
C)53
D)144

Question 60

____ is on the main server and provides address registration and address resolution of MAC addresses to ATM addresses.

A)LAN Emulation Server
B)Network Routing Emulator
C)Broadcast and Unknown Server
D)LAN Emulation Configuration Server

Question 61

What is an SPVC? What is one advantage and one disadvantage of an SPVC?

Question 62

A(n)____________________ simply passes ATM traffic within the network and provides QoS for each virtual circuit.

Question 63

List three advantages of ATM.

Question 64

NHRP stands for ______________________________.

Question 65

What is an ATM PVC? What is its advantage?

Question 66

A(n)____________________ is a set of devices that are dynamically grouped together by protocol, LAN emulation, or MAC address.

Question 67

Typical ATM speeds used to connect one or more servers to ATM by installing ATM adapters in the servers and connecting them to an ATM switch on an ATM backbone are 155.52 Mbps or 622.08 Mbps.

Question 68

SMDS cannot be transported over ATM.

Question 69

A(n)____________________ is a pathway between two nodes on a switched network, which appears to be a dedicated point-to-point link, and which is transparent to the user.

Question 70

_________________________ is a methodology used to transport legacy traffic over an ATM network and supports only one protocol, IP.

Question 71

A(n)____________________ translates data streams into or out of an ATM cell stream on an ATM network.

Question 72

Because ATM is a(n)____________________ technology, it is easily scalable.

Question 73

What are three advantages of LANE?

Question 74

The overall goal of managing ATM LANs and WANs is to monitor network congestion and flow control for optimal traffic patterns.

Question 75

Discuss the ways in which connection management is accomplished in an ATM installation.

Question 76

What sets ATM apart from other transport methods?

Question 77

What does QoS stand for, and how is it related to ATM?

Question 78

Cell ____________________ are used to temporarily store cells as they pass through the switch, especially when traffic volume is high.

Question 79

ATM stands for ______________________________.

Question 80

In which layer do you find the SAR and Convergence sublayers? What are their functions?