week 3 chapter 4

Question 1

charicteristics on ethernet stay the same even with the difference in speed

Question 2

110bast 1000base t 1000 baselx 1000basesx and 10gbaset

Question 3

twisted pair ethernet standards

Answer 3

100baset4 and 100basetx

Question 4

two twisted-pair Ethernet standards appeared: 100BaseT4 and 100BaseTX. 100BaseT4 used Cat 3 cable, whereas
100BaseTX used Cat 5 and Cat 5e. B

Question 5

, 100BaseTX became the dominant
100-megabit Ethernet standard. 100BaseT4 disappeared from the market and today has
been forgotten. As a result, we never say 100BaseTX, simply choosing to use the term
100BaseT.

Question 6

100BaseT Summary
* Speed 100 Mbps
* Signal type Baseband
* Distance 100 meters between the hub/switch and the node
* Node limit No more than 1024 nodes per hub/switch
* Topology Star-bus topology: physical star, logical bus
* Cable type Cat 5 or better UTP or STP cabling with RJ-45/8P8C connector

Question 7

EXAM TIP A baseband network means that only a single signal travels over
the wires of the network at one time, occupying the lowest frequencies.
Ethernet networks are baseband. Contrast this with broadband, where
you can get multiple signals to flow over the same wire at the same time,
modulating to higher frequencies. The latter is how cable television and
cable Internet work.

Question 8

All modern NICs are multispeed and auto-sensing.

Question 9

100BaseFX

Answer 9

fibver optic cabled 100megabit ethernet multimode fiber optic cabling and sc or st connectors maximum length of 2km

Question 10

UTP cabling cannot meet the needs of every organization for three key reasons. First,
the 100-meter distance limitation of UTP-based networks is inadequate for networks covering large buildings or campuses. Second, UTP’s lack of electrical shielding makes it a poor
choice for networks functioning in locations with high levels of electromagnetic interference
(EMI)—disturbance in electrical signals caused by electrical radiation coming from nearby
devices. Finally, the Jason Bournes and James Bonds of the world find UTP cabling (and
copper cabling in general) easy to tap, making it an inappropriate choice for high-security
environments

Question 11

100BaseFX Summary
* Speed 100 Mbps
* Signal type Baseband
* Distance Two kilometers between the hub/switch and the node
* Node limit No more than 1024 nodes per hub/switch
* Topology Star-bus topology: physical star, logical bus
* Cable type Multimode fiber-optic cabling with ST or SC connectors

Question 12

EXAM TIP There is no scenario today where you would install 100Base
networking components, except perhaps to make use of donated
equipment. You will definitely find 100Base gear installed and functioning
in many organizations.

Question 13

half duplex

Answer 13

could only send or recive at one time

Question 14

full duplex

Answer 14

can send and recive at the same time

Question 15

all nics today run full duplex

Question 16

The IEEE approved two different versions of Gigabit Ethernet. The most widely
implemented solution, published under the IEEE 802.3ab standard, is called 1000BaseT.
The other version, published under the 802.3z standard and known as 1000BaseX, is
divided into a series of standards, with names such as 1000BaseSX and 1000BaseLX.

Question 17

1000BaseT uses four-pair UTP or STP cabling to achieve gigabit performance. Like
10BaseT and 100BaseT, 1000BaseT has a maximum cable length of 100 meters on a
segment. 1000BaseT connections and ports look exactly like the ones on a 10BaseT or
100BaseT network. 1000BaseT is the dominant Gigabit Ethernet standard.

Question 18

1000basesx

Answer 18

multimode fiber optic cableing
maximim length of 220 to 500 meters
85 nano meter wave length
most common connector is LC

Question 19

1000base LX

Answer 19

long distance carrier
uses lasers on single mode cables
distance of 5 km
special repeartes to increace distanceto 70km

Question 20

sff fiber connectors

Answer 20

st connectos are large twist on connectors
not popular with fiber cable because the cable may break
st connectors closely packed
sc connectors snap in and out making them popular
sc connectors are also large
small for facto connectors or sff connector
mt-rj connector and the i.c connector
most prefer the i.c connector

Question 21

1000BaseSX Multimode fiber 850 nm Variable,
commonly LC
220–500 m
1000BaseLX Single-mode fiber 1300 nm Variable, commonly
LC and SC
5 km
1000BaseT Cat 5e/6 UTP Four-pair/full-duplex RJ-45 100 m

Question 22

EXAM TIP The wavelength of a particular signal (laser, in this case) refers to
the distance the signal has to travel before it completes its particular shape
and starts to repeat. The different colors of the laser signals feature different
wavelengths.

Question 23

1000baselx

Answer 23

is the long distance carrier for gigabit thernet
lasers on single mode cables
distance up to 5 km but can be extended to 70km

Question 24

mechanical connection variations

Answer 24

cary on the connection point
standard connecotr type is called physicla contanct connector or pc connector because two peices of fiber touch when inserted

Question 25

mechanical connection variations

Answer 25

cary on the connection point
standard connecotr type is called physicla contanct connector or pc connector because two peices of fiber touch when inserted

Question 26

flat surface connector

Answer 26

left a gap between connection points due to imperfections in the glass

Question 27

upc

Answer 27

ultra physical contact

Question 28

apc

Answer 28

angled physical contact
8 degree curved end to lower signal loss
does not degrade form mutiple inserstions

Question 29

EXAM TIP As of this writing, the CompTIA Network+ Acronyms list
incorrectly identifies the “P” in UPC and APC as “Polished.” It’s “Physical”
as indicated here, but don’t get thrown off on the exam

Question 30

different media converters

Answer 30

Single-mode fiber (SMF) to UTP/STP
* Multimode fiber (MMF) to UTP/STP
* Fiber to coaxial
* SMF to MMF

Question 31

stabdard for modular ports

Answer 31

gigabit interface converter

Question 32

gbic

Answer 32

can pull out a transvicer that supoorts one flabor of gigiabit ethernet and plug it into another
can replace rj 45 port with sc gbic for exampole

Question 33

sfp

Answer 33

small form factor pluggable
hot swappable like gbic and take up alot less space

Question 34

high speed internet standards

Answer 34

10/40/100 gigabit ethernet

Question 35

10 gigabit ethernet

Answer 35

10 gigabits per second

Question 36

fiber based 10 GBE

Answer 36

use traditional lan mechanisms plus a set that could take advantage of sonot infastructreu to run over wan fiber
type of fiber used lenth of laser or lasers and physical layer signaling type these factors define macimum signal distance

Question 37

sonet

Answer 37

synchronous opitical network