Chapter 3 - Sheet1 Flashcards Preview

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Flashcards in Chapter 3 - Sheet1 Deck (60):
1

Name two types of cables used in today's networks

Twisted pair, fiber optic

2

Name a type of cable mostly not used in today's network, and when they are used.

Coaxial -- still used to connect to cable modems

3

Name the type of end used for Coax

BNC

4

Name the type of end used for twisted-pair

RJ-11 for voice, RJ-45 for data

5

Which pins aren't used in 568A or 568B standard?

4, 5, 7, and 8

6

ST

Straight Tip

7

SC

Subscriber Connector OR Square Connector

8

Name the two most popular versions of the small form factor fiber-optic connectors (SFF)

Mechanical Transfer Registred Jack (MT-RJ), Local Connector (LC)

9

Why would you need a T1 crossover cable?

To connect two CSU/DSUs

10

What pins connect to what pins in a straight-through calbe?

1->1, 2->2, 3->3, 6->6

11

Picture of ST

ST

12

Picture of SC

SC

13

Picture of LC Fiber-Optic

LC Fiber-Optic

14

Picture of MT-RJ

MT-RJ

15

Most widely used fiber-optic connectors

Straight-tip (ST)

16

LC

Local Connector

17

MT-RJ / MTRJ

Mechanical Transfer Registred Jack

18

Name the media converters available

single mode fiber to Ethernet, multimode fiber to Ethernet, fiber to coaxial, and single mode to multimode fiber.

19

What is a 568A to 568A cable?

Straight-through cable. Connects hosts to switches or hubs

20

What is a 568A to 568B cable?

Crossover cable. Connects switches to switches, hosts directly to hosts.

21

CSU/DSU

A Modem. Channel service unit/data service unit

22

Describe a T1 crossover cable

568B crossover that connects pins 1, 2, 4, and 5 to 4, 5, 1, and 2, respectively.

23

Describe why you need a T1 crossover cable

In rare instances, you may have the need to run a cable between two CSU/DSUs

24

Describe the operation of Broadband over Power Line

BPL allows for the transmission of data over existing power lines, both for networking home computers and for receiving Internet access to a building.

25

How many lines and twisted pairs are there in the 568A and 568B standards

8 lines divided into 4 twisted pairs

26

When would you use a straight-through cable?

connect a host to switch/hub, connect a router to a switch/hub

27

When would you use a crossover cable?

Switch to switch, hub to hub, host to host, router to direct host

28

Which pairs and colors are swapped between 568A and 568B standards

Pairs 2 and 3 (orange and green)

29

Which UTP wiring uses four twisted wire pairs (eight wires) and is rated for 250MHz?

Cat 6 UTP

30

The point at which the operational control or ownership changes from your company
to a service provider is referred to as ___________________.

Demarc (Short for Demarcation), or point of demarc

31

Which type of cable will you use to connect switches?

Crossover cable

32

Which RG rating of coax is used for cable modems?

RG-6

33

Which UTP uses four twisted wire pairs (eight wires), is rated for 100MHz, and is
capable of handling the disturbance on each pair caused by transmitting on all four
pairs at the same time?

Cat 5e

34

You want to connect a host to a switch port. What type of Ethernet cable will you use?

Straight through

35

In what instance would you use T1 crossover cable?

When you want to connect two CSU/DSUs

36

568A uses which pins to make a connection?

1, 2, 3, 6

37

568B uses which pins to make a connection?

1, 2, 3, 6 (Remember: 1 to 3, 2 to 6)

38

What are two advantages of fiber-optic cabling?

It’s completely immune to EMI and RFI., It can transmit up to 40 kilometers (about 25 miles).

39

What are the disadvantages of fiber-optic cabling?

Difficult to install, more expensive than twisted pair, troubleshooting equipment is more expensive than twisted pair troubleshooting equipment, harder to troubleshoot

40

Describe Cat 1

2 twisted pairs (4 wires), 1Mhz. Pre-1983, standard for phones sys (POTS) in US

41

Describe Cat 2

4 twisted pairs (8 wires), 10Mhz. 4Mbps. Obsolete

42

Cescribe Cat 3

4 twisted pairs (8 wires), 16Mhz. 10Mbps. Used in '80s. Now limited to POTS

43

Describe Cat 4

4 twisted pairs (8 wires), 20Mhz. 16Mbps. Applications include Token Ring networks

44

Describe Cat 5

4 twisted pairs (8 wires), 100Mhz. 100Mbps. Most common on current LANS.

45

Describe Cat 5e

4 twisted pairs (8 wires), 100Mhz. Can handle crosstalk caused by sending data on all pairs at once, making it capable of 1Gbps. Modern standard: No LAN should be set up without 5e or higher.

46

Desribe Cat 6

4 twisted pairs (8 wires), 250Mhz. 10Gbps. Became a standard in '02. Shorter max distance than Cat6a

47

Describe Cat 6a

4 twisted pairs (8 wires), 500Mhz. 10Gbps. 100 Meters max distance. 100% increase in near-end crosstalk (NEXT) noise reduction using ISO/IEC component specifications

48

What is a demarc extension?

The point after the demarc but before the line reachees your property/office -- the line running from the demarc to an office floor, for example

49

Which RG rating is used for Thinnet

RG-58 a/u

50

Which RG raging is used for Ticknet

RG-8

51

Which RG rating is used for cable TV?

RG-59 and RG-6

52

Which RG raiting is used for cable modems?

RG-6

53

Which RG rating was used for ARCnet

RG-62

54

EMI

Electromagnetic interference - Interference caused by magents, lights, etc

55

RFI

Radio frequency interference - Interference caused by radio signals

56

Which UTP wiring uses four twisted wire pairs (eight wires) and is rated for 250MHz?

Category 6

57

The point at which the operational control or ownership changes from your company
to a service provider is referred to as ___________________.

Demarcation point or demarc

58

Which type of cable will you use to connect switches?

Crossover

59

Which RG rating of coax is used for cable modems?

RG-6

60

Which UTP uses four twisted wire pairs (eight wires), is rated for 100MHz, and is
capable of handling the disturbance on each pair caused by transmitting on all four
pairs at the same time?

Category 5e