Chapter 5: Modern Ethernet

Question 1

What standard does IEEE 802.3ab describe?

Answer 1

1000BaseT

Question 2

How many pairs of wires do 10BaseT and 100BaseT use?

Answer 2

2

Question 3

How many wire pairs does 1000BaseT use?

Answer 3

4

Question 4

Fill in the following qualities of 100BaseTX:

1) Speed
2) Signal Type
3) Distance
4) Node Limit
5) Topology
6) Cable Type
7) Connector

Answer 4

1) 100 Mbps
2) Baseband
3) 100m
4) 1024/hub or switch
5) Star bus
6) CAT5 or better
7) RJ-45

Question 5

Which network standard is known as “Fast Ethernet”?

Answer 5

100BaseTX

Question 6

What does it mean if a network is baseband?

Answer 6

Only a single signal travels over the wires of the network at one time.

Question 7

What does it mean for a network to be broadband?

Answer 7

Multiple signals travel over the wires of the network at one time.

Question 8

Fill in the following qualities of 100BaseFX

1) Speed
2) Signal Type
3) Distance
4) Node Limit
5) Topology
6) Cable Type
7) Connector

Answer 8

1) 100 Mbps
2) Baseband
3) 2 km
4) 1024/hub or switch
5) Star bus
6) Multimode Fiber
7) ST or SC

Question 9

Which network standard is referred to as “Gigabit Ethernet”?

Answer 9

1000BaseT

Question 10

Fill in the following qualities of 1000BaseT

1) Speed
2) Signal Type
3) Distance
4) Node Limit
5) Topology
6) Cable Type
7) Connector

Answer 10

1) 1000 Mbps (1Gbps)
2) Baseband
3) 100m
4) 1024/hub or switch
5) Star bus
6) CAT5e or better
7) RJ-45

Question 11

What are twinax cables?

Answer 11

Special shielded 150-Ohm cables with a length limit of 25m

Question 12

Fill in the following qualities for 1000BaseCX

1) Cabling
2) Connector
3) Max Distance

Answer 12

1) Copper/Twinax
2) Twinax
3) 25m

Question 13

Fill in the following qualities for 1000BaseSX

1) Cabling
2) Connector
3) Max Distance

Answer 13

1) Mulitmode Fiber (850nm)
2) LC
3) 220-500m

Question 14

Fill in the following qualities for 1000BaseLX:

1) Cabling
2) Connector
3) Max Distance

Answer 14

1) Single-mode Fiber (1300nm)
2) LC or SC
3) 5 km

Question 15

What are two types of Small Form Factor (SFF) connectors?

Answer 15

1) LC connectors

2) Mechanical Transfer Registered Jack (MT-RJ)

Question 16

Physical Contact (PC) connector

Answer 16

The standard fiber connector type

Question 17

Ultra Physical Contact (UPC) connector

Answer 17

A PC connector that is polished extensively, reducing signal loss.

Question 18

Angled Physical Contact (APC) connector

Answer 18

A PC connector that adds an 8-degree angle to the curved end, lowering signal loss.

Question 19

Media Converter

Answer 19

A box used to connect any type of Ethernet cabling together

Question 20

For a basic 10Gbe standard, what do X and Y specify in the following: 10GBaseXY

Answer 20

X = Type of fiber and wavelength
Y = Physical layer signaling standard

Question 21

In 10GBaseXY, what are the possible values of X and what do they indicate?

Answer 21

S => Short Wavelength (850nm), Multimode Fiber

L => Long Wavelength (1310nm), Singlemode Fiber

E => Extra Long Wavelength (1550nm), Singlemode Fiber

Question 22

In 10GBaseXY, what are the possible values of Y and what do they indicate?

Answer 22

R => LAN-based network

W => SONET/WAN-based network

Question 23

Multisource Agreements (MSAs)

Answer 23

Agreements among multiple manufacturers to make interoperable devices and standards.

Question 24

Backbone Network

Answer 24

A part of computer network infrastructure that interconnects various pieces of network, providing a path for the exchange of information between different LANs or subnetworks.