Deck 11: Wide Area Networks

Question 1

What is the size of an ATM packet?

A)48 bytes
B)53 bytes
C)64 bytes
D)84 bytes

Answer 1

B

Question 2

The customer's endpoint device on the WAN is called the __________________.

Answer 2

Data Terminal Equipment (DTE)

Question 3

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

A)You are guaranteed to receive the maximum amount of bandwidth specified in the circuit contract
B)You pay only for the bandwidth you've used.
C)The paths that your data will take are always known.
D)Frame relay is a newly established network technology with more features than other technology.

Answer 3

B

Question 4

WANs connect nodes,such as workstations,servers,printers,and other devices,in a small geographical area on a single network.

Question 5

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

A)bus topology
B)ring topology
C)star topology
D)circle topology

Question 6

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

A)16
B)32
C)64
D)96

Question 7

How many channels exist in a T1 connection?

A)1
B)24
C)48
D)96

Question 8

A bus topology WAN is often the best option for an organization with only a few sites and the capability to use dedicated circuits.

Question 9

T-1 cables cannot utilize straight through cables using the same wiring scheme as LAN patch cables.

Question 10

What xDSL standard is the most popular?

A)VDSL
B)G.Lite
C)ADSL
D)HDSL

Question 11

The carrier's endpoint on a WAN is called the Data Communications Equipment (DCE).

Question 12

Multiplexing enables a single ____________ circuit to carry 24 channels,each capable of 64 Kbps throughput.

Question 13

What version of xDSL is the most popular?

A)VDSL
B)G.Lite
C)ADSL
D)HDSL

Question 14

What is the maximum throughput of a DS3 connection?

A)1.544
B)3.152
C)44.736
D)274.176

Question 15

If the line between the carrier and the customer experiences significant errors on a T-1,a ____________ will report this fact to the carrier.

Question 16

In a PON setup,the system is considered passive because no repeaters or other devices intervene between the carrier and the customer.

Question 17

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

A)CSU/DSU
B)cable modem
C)DSL modem
D)ISDN modem

Question 18

In ATM,a packet is called a _____________ and always consists of 48 bytes of data plus a 5 byte header.

Question 19

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

A)32 Kbps
B)48 Kbps
C)64 Kbps
D)96 Kbps

Question 20

The ________________ distributes signals to multiple endpoints via fiber-optic cable,in the case of FTTP,or via copper or coax cable.

Question 21

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

A)DOCSIS 1
B)DOCSIS 2
C)DOCSIS 3
D)DOCSIS 4

Question 22

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

A)RJ-11
B)RJ-25
C)RJ-45
D)RJ-48

Question 23

List and describe the four different generations of cellular technology.

Question 24

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

A)SVC identifier
B)data link connection identifier
C)PVC identifier
D)frame path identifier

Question 25

The best 802.11n signal can travel approximately how far?

A)1 mile
B)1/2 mile
C)1/4 mile
D)300 feet

Question 26

What two competing standards exist for cell phone networks?

A)ATM
B)WiMAX
C)GSM
D)CDMA

Question 27

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

A)51.84 Mbps
B)155.52 Mbps
C)622.08 Mbps
D)1244.16 Mbps

Question 28

What is the difference between a DTE and a DCE?

Question 29

List some of the advantages provided by Metro Ethernet.

Question 30

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?

A)split horizon
B)round robin
C)reverse path check
D)spanning tree protocol

Question 31

Frame relay relies on what two different types of virtual circuits?

A)LVC
B)PVC
C)TVC
D)SVC

Question 32

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

A)1.5 - 2.7 GHz
B)2.7 - 3.5 GHz
C)3.4 - 6.7 GHz
D)12 - 18 GHz

Question 33

A MAN connection is also known as which two terms below?

A)Ethernet MAN
B)Metro Ethernet
C)Carrier Ethernet
D)Packet MAN

Question 34

What are some of the features of the WiMAX standard?

Question 35

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

A)STP
B)MLPPP
C)MPLS
D)PPTP

Question 36

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

A)OC-3
B)OC-12
C)OC-48
D)OC-96

Question 37

At what two layers of the OSI model are LAN and WAN protocols likely to differ?

A)Layer 4
B)Layer 2
C)Layer 1
D)Layer 3

Question 38

Outline the differences between a LAN and a WAN connection.

Question 39

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

A)Metro Carrier Transport
B)Carrier Ethernet Transport
C)Intra-city Ethernet
D)Ethernet SONET

Question 40

What two network protocols below rely on virtual circuits?

A)SDH
B)SONET
C)ATM
D)frame relay

Question 41

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A WAN technology that sends Ethernettraffic across MAN connections.

Question 42

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A connectivity devicelocated at a telecommunications carrier's office that aggregatesmultiple DSL subscriber lines and connects them to alarger carrier or to the Internet backbone.

Question 43

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
The guaranteedminimum amount of bandwidth selected when leasing aframe relay circuit.Frame relay costs are partially basedon this.

Question 44

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
An intelligent type of NIU located at the customer'sdemarc that can provide diagnostic information aboutthe interface.

Question 45

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A special case of geosynchronous orbitin which the satellite stays directly above the equator andappears stationary from Earth.Thesesatellitesare the type used to provide satellite Internet access.

Question 46

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A 4G cellular network technologythat,in its latest version (called LTE-Advanced),achievesdownlink data rates of up to 3 Gbps and uplink rates of up to1.5 Gbps.AT&T and Verizon have adopted LTE for theirhigh-speed wireless data networks.

Question 47

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A WAN technologyfunctioning primarily at Layer 2 (although its protocols canalso reach Layers 1 and 3)that was originally conceived inthe early 1980s at Bell Labs and standardized by the ITU inthe mid-1990s.

Question 48

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A variety of ISDN that uses two64-Kbps bearer channels and one 16-Kbps data channel,assummarized by the notation 2BþD.

Question 49

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
A type of WAN in which each site isconnected to two other sites so that the entire WAN forms a ring pattern.

Question 50

Matching
Match each correct item with the statement below.
a.ATM (Asynchronous Transfer Mode)
b.BRI (Basic Rate Interface)
c.CIR (committed information rate)
d.DSLAM (DSL access multiplexer)
e.geostationary orbit
f.LTE (Long Term Evolution)
g.Metro Ethernet
h.ring topology WAN
i.smart jack
j.transponder
The equipment on a satellite that receives anuplinked signal from Earth,amplifies the signal,modifies itsfrequency,then retransmits it (in a downlink)to an antennaon Earth.