Deck 16: Metropolitan Network

Question 1

In telecommunications the term metro refers to the network that interconnects the customer to the central office, also referred to as the "last mile".

Answer 1

False

Question 2

The metro network can be compared to the expressways and main arteries connecting different areas within a region.

Answer 2

True

Question 3

The most common transmission medium deployed in the metro network is:

A) DWDM, wireless Bluetooth, fiber optic cable, copper, coaxial cable.
B) Fiber optic cable, wireless, copper cable.
C) Fiber optic cable and copper cable.
D) None of the above

Answer 3

None of the above

Question 4

The network topology deployed in the metro network is:

A) Ring, Mesh, Linear, Point to Point
B) Ring and Mesh
C) Ring, Linear, Point to Point
D) Mesh, Point to Point, Linear
E) None of the above

Question 5

It is difficult to cost justify deploying a fully mesh network in the metro area.

Question 6

Similar to an expressway looping a city, fiber rings provide on/off ramps that can be compare to:

A) Tributary interfaces
B) Line side interfaces
C) Tributary and Line interfaces
D) None of the above

Question 7

CWDM systems are easier to cost justify due to the greater/less spacing between channels.

A) Greater
B) Less

Question 8

Metro networks are built, deployed and managed by:

A) Local telephone companies, CATV providers, Cellular providers, CAPs, FSOs.
B) Local telephone companies, CATV providers, LD companies.
C) Local telephone companies, CATV providers, FSOs, CAPs, Cellular providers, Municipalities.
D) None of the above.

Question 9

SONET multiplexers are seldom deployed in the metro network.

Question 10

The line side interfaces found in a metro SONET mux ranges between ________ and ________.

Question 11

The tributary side interfaces found in a metro SONET mux ranges between ________ and ________.

Question 12

The introduction of Ethernet interface cards in a SONET mux helps improve the SONET protocols ability to utilize bandwidth more efficiently.

Question 13

Layer 1, 2 and 3 communications protocols are commonly deployed in the metro network.

Question 14

ATM is a common layer 2 protocol deployed in the metro network.

Question 15

________ is the most common layer three protocol deployed in the metro network.

Question 16

Select the most common layer 1 protocols deployed in the metro network.

A) SONET, DS1, DS3
B) Frame Relay, FDM, SONET, DS1, DS3
C) FDM, SONET, DS1, DS3
D) Frame Relay, SONET, DS1, DS3
E) None of the above

Question 17

A ________ cross connect is used to groom channels from one circuit to another.

Question 18

A broadband cross connect is one of the most important pieces of equipment deployed in the metro network.

Question 19

A frame relay switch placed at the customer premises is used to interface to the customer's end equipment - DCE.

Question 20

A metro frame relay network requires the following:

A) Frame switch, FRAD, SONET mux, High speed circuit
B) Frame switch, FRAD, DS1 or higher speed circuit
C) Frame switch, FRAMD, ATM aggregation device, DS1 or higher speed circuit
D) Frame switch, FRAD, DSLAM, DS1 or higher speed circuit

Question 21

A metropolitan network is used to interconnect traffic aggregation points within a metropolitan region.

Question 22

Commonly local telephone companies deploy metro networks to interconnect their ________ offices.

Question 23

CATV companies deploy metro networks to connect their ________ points to their ________ end.

Question 24

Cellular telephone providers requiring high bandwidth connections lease or build circuits within the metro space to interconnect their ________ to their ________ site.

Question 25

Carrier Access Providers build interconnected ________ rings to carry traffic across the metro footprint.

Question 26

A CAP leases bandwidth to:

A) CATV providers, cellular providers, ISPs, other CAPs.
B) Local telephone companies, long distance companies.
C) Long distance companies, Tier 1 ISPs, ISPs, CATV providers, Cell Providers, WiMax providers, Municipalities, or other government agencies.
D) None of the above

Question 27

Today large businesses opt to build or purchase dark fiber and build their own metro networks used to interconnect remote offices together.

Question 28

Metro networks are very easy to deploy, maintain and augment due to the simple network technology and the limited number of protocols deployed.

Question 29

The two most common types of fiber optic cable deployed in the metro network are ________ and ________.

A) SSMF, NZDSF
B) ESMF, SSMF
C) ESMF, NZDSF, Multimode
D) ESMF, NZDSF, Singlemode
E) None of the above

Question 30

Multimode fiber is the most common type of fiber deployed in the metro network.

Question 31

ATMs feeding into a central bank can be used as a good example of:

A) Mesh topology
B) Ring topology
C) Point to point topology
D) Multipoint topology
E) Bus topology

Question 32

________ topology provides redundancy, simple provisioning methods, and a secure network that make it one of the most popular architectures for large fiber-optic networks.

Question 33

The advantage that multipoint networks have over mesh is the ability to talk directly to every other device on the network.

Question 34

________ network routers are responsible for routing packets from location to location while other routers control the local network that feeds into them.