Ch. 10
Which of the following is in Frame Relay's speed range?
A) 10 Mps
Which of the following is a fractional T1 line speed?
A) 128 kbps
A firm uses a PSDN. it has four sites. how many leased lines will it need?
A) 4
In _____, switching decisions are based on destination addresses
A) Ethernet
A company has more control over its _____ technology
A) LAN
Which of the following offers true 4G speeds?
A) LTE advanced
Frame relay contains
A) Virtual circuit numbers
Which of the following has more diversity in technologies?
A) WANs
Leased lines standards are most different around the world at speeds _____
A) below about 50 MBps
Local loop access lines to business use which of the following transmission media?
A) optical fiber
The use of virtual circuits _____
A) reduces costs
Using the internet as a WAN is attractive because of ______
A) the internets low cost per bit
T1 leased lines run at a speed of about
B) 250 kbps but D) 1 Mbps
In ADSL the residential customer needs a
B) ADSL modem
Which of the following DSL services tend to be symmetric in speed?
B) Business
Which of the following DSL services usually offers QoS guarantees?
B) Business
Which of the following does the carrier NOT own?
B) Customer premises equipment
According to the ITU, which of the following can be advertised as 4G?
B) LTE
Which of the following offers higher speeds?
B) MAN
Which of the following are more widely used?
B) T1 lines
The internet is a _____
B) WAN
Which of the following has more diversity in technologies
B) WANs
When a cellular customer moves from a cell in a city to another cell in the same city, this is
B) a handoff
Combining multiple WAN technologies into a collectively managed system is called having _____
B) a virtual WAN
Companies use carriers for WAN transmission because _____
B) companies lack rights of way
Two way amplifiers are needed for cable ____ service
B) data
Two way amplifiers are needed for cable ____ service.
B) data
Using the internet as a WAN is attractive because of
B) internet's low cost per bit
A WAN is a network that ______
B) links different sites together
SONET/SDH lines use
B) optical fiber
SONET/SDH lines use ______
B) optical fiber
Which of the following DSL services does not offer QoS guarantees?
B) residential
Fiber to the home service is normally created by _____
B) running optical fiber to neighborhoods
Fiber to the home service is normally created by ______
B) running optical fiber to neighborhoods
LAN speeds are faster than WAN speeds. This is because of _____
B) technological limitations
Frame relay frames contain ______
B) virtual circuit numbers
In ADSL the customer should have _____
C) Both A and B (router at each site and leased lines)
LANs are _____
C) Either A or B (single networks and internets)
On what full 4G standard are carriers converging?
C) LTE advanced
For their transmission, medium cable television companies primarily use ____.
C) coaxial cable
In coaxial cable, the two conductors ______
D) neither A nor B (are not twisted around each other or run side by side)
ATM _______.
D) neither A nor B (is relatively inexpensive and offers speeds in the range of greatest corporate demand)
According to the ITU which of the following offers true 4G speeds?
D) neither A nor B (not LTE or HSPA+)
LAN speeds are faster than WAN speeds. This is because of
D) technological limitations
By regulation, cellular systems must give almost the same throughput at different places in their service areas.
False
The slowest offered SONET/SDH leased lines run at about 50 Mbps
False
UTP transmission is normally limited to about 100 meters
False
All SONET/SDH leased lines run faster than 50 Mbps
True
Cellular carriers are happy when flat fee users use a corporate 802.11 LAN to place calls instead of using the carrier network.
True
Cellular technology was created to support more customers in a single area
True
DSL throughput is typically sensitive to distance from the nearest switching building
True
Metro ethernet offers relatively high speeds and low costs
True
The general name for a company that is given rights of way to lay wires through public areas is a carrier
True
To deliver signals to individual residences cable television companies primarily use coaxial cable
True
WANs are ______
C) either A or B (single networks and internets)
A LAN is a network that ______
C) provides service within a site
Cells are used in cellular telephony to provide
C) service for more customers