Chapter 10

Most WiMAX providers in the US are using an effective data range of 0.5 to 1.5 miles 3-10 miles 1-3 miles 0.5-50 miles 1-5 miles

0.5 to 1.5 miles

A T1 level of ADSL has a maximum downstream rate of about _________ Mbps. 9000 8.4 1.5 650 6.1

1.5

The maximum download data rate for cable modem systems is currently 1 Mbps 1.44 Mbps 5 Mbps 100 Mbps 150 Mbps

150 Mbps

Data traffic from the customers premises is sent to a __________ which is located at the local carrier's end office. modem codec DSLAM NIC ATM

DSLAM

Technologies such as DSL and cable modem are called narrowband technologies. True False

False

The Internet Engineering Steering Group provides strategic architectural oversight for the Internet. True False

False

The Internet is flat in structure. True False

False

Tier 1 ISPs connect together and exchange data at ___________. IXPs cable modem termination system endpoints distribution hubs the Internet engineering task force headquarters the Internet Society network center

IXPs

__________ has led to the belief that the Internet is "free". Encrypting Peering Bridging Tolling Polling

Peering

Internet 2 is the common name for the Abilene network. True False

True

Peering means that a tier 1 ISP does not charge another tier 1 ISP to transmit its messages. True False

True

The most common cable modem standard is Data over Cable Service Interface Specification. True False

True

The most common type of DSL today is ADSL. True False

True

WiMAX was designed to use the _______ frequencies. 2.3 GHz and 3.1 GHz 2.4 GHz and 5 GHz 2.3 GHz, 2.5 GHz, and 3.5 GHZ 1.44 GHz, 2.4 GHz, and 5 GHz any frequency between 2.3 GHz and 3.5 GHz

2.3 GHz, 2.5 GHz, and 3.5 GHZ

Internet2® is an organization of about _____ universities, corporations, government agencies, and organizations. 100 250 400 750

400

At the DSL customer premises is a device called a(n) cable modem DSL router DSL modem Internet router DSL bridge

DSL modem

A DSL modem is also known as a: DSL bridge DSL brouter DSL router DSL gateway DSL hub

DSL router

At the DSL local carrier's office, the __________ demultiplexes the data streams and converts them into ATM data. DSLAM GrandSlam WAP line splitter X.25 PAD

DSLAM

WiMax was designed to easily connect into existing ___________. wide area networks backbone networks Ethernet LANs ATM backbones FTTH

Ethernet LANs

Another term for a DSL modem is a DSL brouter. True False

False

BM recently developed a new WiMAX chip set. True False

False

Digital Subscriber Line is a family of multipoint technologies. True False

False

Each of the networks in Internet 2 has a set of access points called terapops. True False

False

IXPs were originally designed to connect only tier 3 ISPs. True False

False

In a DSL environment, the line splitter and DSL modem are always two separate devices. True False

False

The ________ is a large open international community of network designers, operators, vendors, and researchers concerned with the evolution of the Internet architecture and smooth operation of the Internet. Internet Society Internet Engineering Task Force Internet Engineering Steering Committee Internet Architecture Board Internet Research Task Force

Internet Engineering Task Force

The _________operates like the IETF through small research groups focused on specific issues. Internet Society University Corporation for Advanced Internet Development Internet Engineering Steering Committee Internet Architecture Board Internet Research Task Force

Internet Research Task Force

The closest the Internet has to an "owning" organization is the ___________. Internet Service Provider Abilene network CA*Net3 University Corporation for Advanced Internet Development Internet Society

Internet Society

At the top of the Internet structure are tier 1 ___________, such as AT&T and Sprint. Network Access Points Internet service providers bridges LATAs digital subscriber lines

Internet service providers

Which of the following new Internet efforts was started by 34 universities? CA*net 3 ARDNOC vBNS NGI Internet2

Internet2

Which of the following statements is true? On a circuit, the shorter the distance, the higher the speed. On a circuit, the longer the distance, the higher the speed. On a circuit, the longer the distance, less attenuation occurs. On a circuit, the shorter the distance, more attenuation occurs. When more attenuation occurs, higher frequency signals can be used effectively.

On a circuit, the shorter the distance, the higher the speed.

Which of the following is one of the tier 1 ISPs in North America? IETF IEEE IAB Sprint ISOC

Sprint

Digital _________ Line is a family of point-to-point technologies designed to provide high-speed data transmission over traditional telephone lines. System Satisfaction Speedy Subscriber Switch

Subscriber

A distribution hub includes a combiner and a Cable modem termination system. True False

True

A point of presence is the place at which the ISP provides services to its customers. True False

True

Tier 1 service providers connect together and exchange data at IXPs. True False

True

A ___________ is used by ISPs to authenticate its customers. password server remote-access server. file server WAP server. Web server

remote-access server.

A digital service offered by cable companies is the _________. Abilene network WAP proxy G.Lite ADSL cable modem Next Generation Internet

cable modem

A(n) ___________ contains a series of cable modems/multiplexers and converts the data from cable modem protocols into protocols needed for Internet traffic, before passing them to a router connected to an ISP POP. Internet steering system optical-electrical converter WAP proxy cable modem termination system fixed wireless system

cable modem termination system

In a cable modem environment, a _______ is used to combine Internet data traffic with ordinary TV video traffic and then send it back to the fiber node for distribution. modem router bridge combiner CMTS

combiner

Which of the following is not part of the work of the Internet Society? public policy connecting optical-electrical converters education development of Internet standards maintenance of Internet standards

connecting optical-electrical converters

For access to DSL, __________ equipment is installed at the customer location. point-of-presence satellite dish customer premises metropolitan area exchange network access point

customer premises

A headend is also referred to as a: Abilene network WAP proxy cable modem distribution hub fiber node

distribution hub

A high-speed Internet has a set of access points called ____pops that provide point-of-presence at ________ speeds. giga, gigabit mega, megabit multi, multibit giga, megabit multi, gigabit

giga, gigabit

Another term for cable networks that use both fiber-optic and coaxial cable is __________. fixed wireless mobile wireless distribution hub hybrid fiber coax fibrax

hybrid fiber coax

A __________ separates traditional voice telephone transmission from the data transmissions in the equipment located at the customer site for DSL. line splitter V.32bis modem line analyzer main distribution frame network access point

line splitter

The _________ is the connection from a home or business to the telephone company end office. distribution hub RFC UCAID local loop CA*net 3

local loop

In a DSL environment, local loops from many customers enter and are connected to the central office computer center main central office main distribution center rack

main distribution center

A(n) __________ is used to connect a fiber optic cable from the cable TV company side to a coaxial cable on the customer side. CA*net 3 RFC WAP proxy fixed wireless connection optical-electrical converter

optical-electrical converter

A _________ is the place at which the ISP provides services to its customers. remote access point network access point cable modem termination system endpoint point-of-presence metropolitan area exchange

point-of-presence