ch 10
The device similar to a DSL router, but used in a FTTH environment is called an optical network unit.
T
The most common cable modem standard is Data over Cable Service Interface Specification.
T
The most common type of DSL today is ADSL
T
Tier 1 service providers connect together and exchange data at IXPs.
T
With regards to DSL, on a circuit, the shorter the distance, the higher the speed
T
1. The Internet is one large network.
F
Digital Subscriber Line is a family of multipoint technologies
F
Each of the networks in Internet 2 has a set of access points called terapops.
F
IXPs were originally designed to connect only tier 3 ISPs.
F
In a DSL environment, the line splitter and DSL modem are always two separate devices
F
Technologies such as DSL and cable modem are called narrowband technologies.
F
The Internet Engineering Steering Group provides strategic architectural oversight for the Internet.
F
The Internet is flat in structure.
F
The phone line from the DSL customer to the telephone company end office is referred to as the "remote loop"
F
To use DSL, a customer needs a DSL Access Multiplexer installed at his or her location
F
With regards to DSL, on a circuit, the longer the distance, less attenuation occurs
F
With regards to DSL, on a circuit, the longer the distance, the higher the speed.
F
With regards to DSL, on a circuit, the shorter the distance, more attenuation occurs
F
With regards to DSL, when more attenuation occurs, higher frequency signals can be used effectively.
F
A cable company distribution hub includes a combiner and a cable modem termination system.
T
A point of presence is the place at which the ISP provides services to its customers
T
ADSL uses FDM to create three channels over the one local loop circuit: one for voice, one for upstream data, and one for downstream data.
T
Peering means that a tier 1 ISP does not charge another tier 1 ISP to transmit its messages.
T
The RFCs that form the basis for Internet standards are developed by the IETF and its working groups.
T
At the DSL local carrier's office, the __________ demultiplexes the data streams and converts them into digital data. a. DSLAM b. GrandSlam c. WAP d. line splitter e. X.25 PAD
a. DSLAM
Tier 1 ISPs connect together and exchange data at ___________. a. IXPs b. cable modem termination system endpoints c. distribution hubs d. the Internet engineering task force headquarters e. the Internet Society network center
a. IXPs
Which of the following statements is true in regards to DSL? a. On a circuit, the shorter the distance, the higher the speed. b. On a circuit, the longer the distance, the higher the speed. c. On a circuit, the longer the distance, less attenuation occurs. d. On a circuit, the shorter the distance, more attenuation occurs. e. When more attenuation occurs, higher frequency signals can be used effectively
a. On a circuit, the shorter the distance, the higher the speed
Some of the new applications being developed for a high-speed Internet include a. Tele-immersion b. Tele-conferencing c. QoS d. Broadband e. Tele-phoning
a. Tele-immersion
In general, tier 3 ISPs make money by charging ________. a. customers b. ICANN c. UCAID d. the DSLAM e. CSUs/DSUs
a. customers
A high-speed Internet has a set of access points called ____pops that provide point- of-presence at ________ speeds. a. giga, gigabit b. mega, megabit c. multi, multibit d. giga, megabit e. multi, gigabit
a. giga, gigabit
A __________ separates traditional voice telephone transmission from the data transmissions in the equipment located at the customer site for DSL. a. line splitter b. V.32bis modem c. line analyzer d. main distribution frame e. network access point
a. line splitter
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. a. Internet Society b. Internet Engineering Task Force c. Internet Engineering Steering Committee d. Internet Architecture Board e. Internet Research Task Force
b. Internet Engineering Task Force
At the top of the Internet structure are tier 1 ___________, such as AT&T and Sprint. a. Network Access Points b. Internet service providers c. bridges d. LATAs e. digital subscriber lines
b. Internet service providers
__________ has led to the belief that the Internet is "free". a. Encrypting b. Peering c. Bridging d. Tolling e. Polling
b. Peering
___________ refers to the fact that ISPs do not charge one another (at the same level) for transferring messages they exchange across an NAP or MAE. a. Popping b. Peering c. Yiping d. Napping e. Chargebacking
b. Peering
Which of the following is not part of the work of the Internet Society? a. public policy b. connecting optical-electrical converters c. education d. development of Internet standards e. maintenance of Internet standards
b. connecting optical-electrical converter
A ___________ is used by ISPs to authenticate its customers. a. password server b. remote-access server. c. file server d. WAP server. e. Web server
b. remote-access server.
Fiber to the Home uses _____. a. frequency division multiplexing b. wavelength division multiplexing c. time division multiplexing d. statistical time division multiplexing e. all of the above
b. wavelength division multiplexing
A T1 level of ADSL has a maximum downstream rate of about _________ Mbps. a. 9000 b. 8.4 c. 1.5 d. 650 e. 6.1
c. 1.5
Internet2® is an organization of about _____ universities, corporations, government agencies, and organizations. a. 100 b. 250 c. 400 d. 750
c. 400
At the DSL customer premises is a device called a(n) a. cable modem b. DSLAM c. DSL modem d. Internet router e. DSL bridg
c. DSL modem
A DSL modem is also known as a: a. DSL bridge b. DSL switch c. DSL router d. DSL gateway e. DSL hub
c. DSL router
Data traffic from the DSL customer premises is sent to a __________, which is located at the local carrier's end office. a. modem b. codec c. DSLAM d. NIC e. ATM
c. DSLAM
The ___________ is responsible for technical management of IETF and the Internet standards process. a. Internet Society b. University Corporation for Advanced Internet Development c. Internet Engineering Steering Committee d. Internet Architecture Board e. Internet Research Task Force
c. Internet Engineering Steering Committee
In 1996, The National Science foundation provided $100 million to start the ___________ program to develop the very-high-performance Backbone Network Service. a. CA*Net3 b. UCAID c. Next Generation Internet d. Internet 3 e. WAP proxy
c. Next Generation Internet
For access to DSL, __________ equipment is installed at the customer location. a. point-of-presence b. satellite dish c. customer premises d. metropolitan area exchange e. network access point
c. customer premises
Peering has led to the emergence of a new organization type called the _______, which permits any ISP to connect to its network. a. gigapop b. autonomous system c. ISP d. IXP e. Service provider
d. IXP
8. Which of the following is one of the tier 1 ISPs in North America? a. IETF b. IEEE c. IAB d. Sprint e. ISOC
d. Sprint
Digital _________ Line is a family of point-to-point technologies designed to provide high-speed data transmission over traditional telephone lines. a. System b. Satisfaction c. Speedy d. Subscriber e. Switch
d. Subscriber
A digital service offered by cable companies is the _________. a. Abilene network b. WAP proxy c. G.Lite ADSL d. cable modem e. Next Generation Internet
d. 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. a. Internet steering system b. optical-electrical converter c. WAP proxy d. cable modem termination system e. fixed wireless system
d. 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. a. modem b. router c. bridge d. combiner e. CMTS
d. combiner
A cable company headend is also referred to as a: a. Abilene network b. WAP proxy c. cable modem d. distribution hub e. fiber node
d. distribution hub
Another term for cable networks that use both fiber-optic and coaxial cable is __________. a. fixed wireless b. mobile wireless c. distribution hub d. hybrid fiber coax e. fibrax
d. hybrid fiber coax
The _________ is the connection from a home or business to the telephone company end office. a. distribution hub b. RFC c. UCAID d. local loop e. CA*net 3
d. local loop
In a DSL environment, local loops from many customers enter and are connected to the _____. a. central office b. computer center c. main central office d. main distribution facility e. rack
d. main distribution facility
A _________ is the place at which the ISP provides services to its customers. a. remote access point b. network access point c. cable modem termination system endpoint d. point-of-presence e. metropolitan area exchange
d. point-of-presence
The _________operates like the IETF through small research groups focused on specific issues. a. Internet Society b. University Corporation for Advanced Internet Development c. Internet Engineering Steering Committee d. Internet Architecture Board e. Internet Research Task Force
e. Internet Research Task Force
The closest the Internet has to an "owning" organization is the ___________. a. Internet Service Provider b. Abilene network c. CA*Net3 d. University Corporation for Advanced Internet Development e. Internet Society
e. Internet Society
Which of the following new Internet efforts was started by 34 universities? a. CA*net 3 b. ARDNOC c. vBNS d. NGI e. Internet2
e. Internet2
Technologies that provide higher-speed communications than traditional modems (e.g., DSL) are known as ______________ technologies. a. middleband b. narrowband c. rubberband d. metalband e. broadband
e. broadband
A(n) __________ is used to connect a fiber optic cable from the cable TV company side to a coaxial cable on the customer side. a. CA*net 3 b. RFC c. WAP proxy d. fixed wireless connection e. optical-electrical converter
e. optical-electrical converte
