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
