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