Deck 5: Wired Ethernet Lans

Question 1

A company has more control over its ________ technology.

A)LAN
B)WAN

Answer 1

A

Question 2

What organization creates Ethernet standards? (Give the most specific answer.)

A)IEEE
B)IETF
C)ISO
D)OSI

Answer 2

A

Question 3

What 802 Working Group creates Ethernet standards?

A)802.1
B)802.e
C)802.3
D)802.11

Answer 3

C

Question 4

Typical LAN speeds are faster than typical WAN speeds.

Question 5

What type of switch connects users to the network?

A)user switches
B)core switches
C)access switches
D)workgroup switches

Question 6

LAN speeds are faster than WAN speeds.This is because of ________.

A)technological limitations
B)regulatory limitations
C)the slow corporate adoption of newer WAN technologies
D)economic reasons

Question 7

A ________ serves a city and its suburbs.

A)MAN
B)PAN
C)both A and B
D)neither A nor B

Question 8

A network that runs on the customer premises is a ________.

A)LAN
B)WAN
C)both A and B
D)neither A nor B

Question 9

Ethernet standards govern the ________ layer.

A)physical
B)data link
C)both A and B
D)neither A nor B

Question 10

What type of switch connects switches to other switches?

A)trunk switches
B)core switches
C)workgroup switches
D)none of the above

Question 11

In LANs,workgroup switches must be able to carry more traffic than core switches.

Question 12

802.11 is the Working Group that creates Ethernet standards.

Question 13

Companies use carriers for WAN transmission because ________.

A)companies lack rights of way
B)carriers have extremely strong security
C)both A and B
D)neither A nor B

Question 14

A LAN is a network that ________.

A)links different sites together
B)provides international service
C)provides service within a site
D)all of the above

Question 15

Ethernet standards govern the ________ layer.

A)physical
B)internet
C)both A and B
D)neither A nor B

Question 16

What 802 Working Group tends to develop security standards to be used by multiple LAN/ MAN technologies?

A)802.1
B)802.s
C)802.3
D)802.11

Question 17

In LANs,UTP typically is for ________.

A)trunk lines
B)access lines

Question 18

A WAN is a network that ________.

A)links different sites together
B)provides service within about a mile
C)provides service within a site
D)all of the above

Question 19

In LANs,optical fiber typically is used in ________.

A)trunk lines
B)access lines

Question 20

The general name for a company that is given rights of way to lay wires through public areas is carrier.

Question 21

Clock cycles are necessary in binary transmission.

Question 22

Which type of transmission is more widely used today?

A)serial
B)parallel
C)Both are used about equally.

Question 23

In the UTP wiring used in LANs,how many wires are there in a cord?

A)1
B)2
C)4
D)8

Question 24

Ethernet processing is executed in hardware.

Question 25

Physical layer standards govern ________.

A)frame structure
B)signaling
C)both A and B
D)neither A nor B

Question 26

Analog signaling is relatively immune to small errors.

Question 27

Serial transmission is transmission over a single wire pair.

Question 28

In digital signaling there is (are)________ state(s).

A)one
B)two
C)a few
D)an infinite number of

Question 29

In the UTP wiring used in LANs,how many wire pairs are there in a cord?

A)1
B)2
C)4
D)8

Question 30

Ethernet standards govern the ________ layer.

A)internet
B)transport
C)both A and B
D)neither A nor B

Question 31

What form of transmission is most resistant to transmission errors?

A)binary
B)digital
C)Both are about equally resistant to transmission errors.

Question 32

In binary signaling there is (are)________ state(s).

A)one
B)two
C)a few
D)an infinite number of

Question 33

Binary signaling is relatively immune to small errors.

Question 34

The main benefit of parallel transmission over serial transmission is ________.

A)reliability
B)speed
C)both A and B
D)neither A nor B

Question 35

Parallel transmission is transmission over ________.

A)4 wire pairs
B)two or more wire pairs

Question 36

A ________ is a disturbance that propagates down a transmission medium to the other side,which reads it.

A)byte
B)kilobyte
C)signal
D)bit

Question 37

Which of the following is relatively immune to small errors?

A)analog signaling
B)binary signaling
C)both A and B
D)neither A nor B

Question 38

Digital signaling is somewhat immune to small errors.

Question 39

Four-pair UTP uses ________ connectors.

A)universal
B)binary
C)ST or SC
D)none of the above

Question 40

A length of UTP wiring is a ________.

A)run
B)fiber
C)cord
D)strand

Question 41

Untwisting wire pairs no more than 1.25 cm (a half inch)at their ends reduces ________.

A)interference
B)crosstalk interference
C)terminal crosstalk interference
D)none of the above

Question 42

The Ethernet standard limits UTP propagation distances to 100 meters at all speeds up to 1 Gbps.

Question 43

Untwisting wire pairs no more than 1.25 cm (a half inch)at their ends completely eliminates terminal crosstalk interference.

Question 44

Cat 5e and Cat 6 wiring can carry Ethernet traffic 100 meters up to ________.

A)10 Mbps
B)100 Mbps
C)1 Gbps
D)10 Gbps

Question 45

Which UTP quality levels are needed to send signals 100 meters at 10 gigabits per second?

A)category 6
B)category 6A
C)both A and B
D)neither A nor B

Question 46

Modal bandwidth is a measure of ________.

A)modal dispersion
B)multimode fiber quality
C)fiber quality
D)propagation speed

Question 47

The ability to transmit in two directions simultaneously is called parallel transmission.

Question 48

What type of interference is most frequently a problem?

A)electromagnetic interference
B)crosstalk interference
C)terminal crosstalk interference
D)noise interference

Question 49

In Ethernet,limiting transmission to 100 meters is done to limit ________.

A)attenuation
B)terminal crosstalk interference
C)both A and B
D)neither A nor B

Question 50

For full-duplex transmission,optical fiber normally uses ________.

A)1 strand
B)2 strands
C)4 strands
D)8 strands

Question 51

When the light energies of two pulses arrive at overlapping times,this is ________.

A)multimode transmission
B)modal bandwidth
C)modal dispersion
D)modal interference

Question 52

Multimode fiber distance is limited primarily by ________.

A)modal dispersion
B)absorptive attenuation
C)both A and B about equally

Question 53

In optical fiber,light travels through the ________.

A)core
B)cladding
C)both A and B

Question 54

In Ethernet,limiting UTP cord runs to 100 meters normally limits ________ to an acceptable level.

A)attenuation
B)noise errors
C)both A and B
D)neither A nor B

Question 55

Optical fiber cords use two strands ________.

A)for reliability through redundancy
B)to form a complete electrical loop
C)to double the transmission speed
D)for full-duplex transmission

Question 56

Which UTP quality levels can send signals at 10 gigabits per second?

A)category 6
B)category 6A
C)both A and B
D)neither A nor B

Question 57

The ability to transmit in two directions simultaneously is ________.

A)parallel communication
B)full-duplex communication
C)both A and B
D)neither A nor B

Question 58

Modal dispersion limits transmission distance in ________.

A)multimode fiber
B)single-mode fiber
C)both A and B
D)neither A nor B

Question 59

UTP categories rate the ________ of UTP cabling.

A)quality
B)speed
C)quality-of-service performance
D)error performance

Question 60

Businesses can select multimode fiber to transmit 1000BASE-SX signals farther by ________.

A)buying fiber with lower modal bandwidth
B)buying fiber with wider core diameter
C)both A and B
D)neither A nor B

Question 61

The 1000BASE-T standard has a maximum distance of 100 meters.When this standard is used,100 meters is the maximum distance span of an Ethernet network.

Question 62

Ethernet addresses are called ________ addresses.

A)MAC
B)physical
C)both A and B
D)neither A nor B

Question 63

If both 1000BASE-LX and 1000BASE-SX will serve your needs,which one should you use?

A)1000BASE-LX
B)1000BASE-SX
C)Either, because both run at the same speed.

Question 64

Ethernet addresses are called MAC addresses.

Question 65

B2-CC-66-0D-5E-BA is a valid MAC address.

Question 66

LAN fiber often uses ________ nm light.

A)850
B)1,310
C)1,550
D)all of the above

Question 67

Ethernet MAC layer addresses are also called physical addresses.

Question 68

H2-BC-66-0D-5E-BA is a valid MAC address.

Question 69

Modal bandwidth is a fiber quality measure for ________ fiber.

A)LAN
B)carrier
C)both A and B
D)neither A nor B

Question 70

The principal distance limiting factor for LAN fiber is ________.

A)modal bandwidth
B)modal dispersion
C)latency
D)none of the above

Question 71

At what layer is the 100BASE-TX standard?

A)physical
B)data link
C)Internet
D)physical and data link

Question 72

Carrier fiber can carry signals farther than LAN fiber.

Question 73

The use of two or more trunk lines between a pair of switches is ________.

A)possible through link aggregation
B)impossible because it would create a loop

Question 74

LANs that span distances of several kilometers by using multimode fiber are made possible by ________.

A)multimode optical fiber
B)high modal dispersion
C)high modal bandwidth
D)regeneration

Question 75

Using link aggregation with two or three trunk lines ________ going to a single,faster Ethernet port.

A)is usually less expensive than
B)is just as fast as
C)both A and B
D)neither A nor B

Question 76

Which is a diameter of multimode fiber?

A)8)3 microns
B)62.5 microns
C)both A and B
D)neither A nor B

Question 77

In Ethernet,synchronization is the purpose of the ________ field.

A)preamble
B)frame check sequence
C)both A and B

Question 78

Which is a diameter of multimode fiber?

A)50 microns
B)62.5 microns
C)either A or B
D)neither A nor B

Question 79

The principal distance limiting factor for carrier fiber is ________.

A)modal bandwidth
B)modal dispersion
C)latency
D)none of the above

Question 80

Light will travel farther in 50 micron fiber than in 62.5 micron fiber.