Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Network+ > 02 - Cabling and Topology > Flashcards

02 - Cabling and Topology Flashcards

1
Q

Network Topology

A

The way that cables and other pieces of hardware connect to one another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Bus Topology

A
  • used a single cable that connected all computers in a line
  • data went out on whole bus
  • needed termination at each end to prevent signal reflection
  • a break removed the termination and causes signal reflection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ring Topology

A
  • connected all computers on a network with a ring of cable
  • data moved in a circle from one computer to the next in the same direction
  • no termination needed
  • a break will break the circuit, stopping data flow
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Star Topology

A
  • all computers connect to a central box

- offered fault tolerance, if there was a break the other computers could still communicate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Physical topology

A

How the cables physically look

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

logical topology

A

how the signals travel electronically (signalling topology)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Hybrid Topology

A

Any form of networking that combines a physical topology with a signaling topology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Topology used today

A

Star-Bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Mesh Topology

A

wireless network, every computer connects to every other computer via two or more routes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Partially Meshed Topology

A

at least two machines have redundant connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fully Meshed Topology

A

Every computer connects directly to every other computer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Coaxial Cable

A
  • central conductor (usually copper)
  • surrounded by an insulating material
  • surrounded by a braided metal shield
  • surrounded by a jacket
  • center wire and braided metal shield share the same axis
  • shields data transmissions from interference
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

EMI

A

Electromagnetic Interference

- can shut down a network because it is easily misinterpreted as a signal by devices like NICs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Coaxial connectors

A
  • BNC - bayonet style

- F-type (screw on connector)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

RG-59

A
  • coaxial cable primarily used for cable television
  • 75 ohms
  • f-type connector
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

RG-6

A
  • used for networking
  • 75 ohms
  • f-type connector
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

RG-58

A
  • older cable
  • 50 ohms
  • BNC connector
18
Q

Why use twisted pair?

A
  • wire is twisted to prevent crosstalk

- the more twists per foot, the less crosstalk

19
Q

STP

A

Shielded Twisted Pair

- shielding protects from EMI

20
Q

Why use STP over UTP?

A

use STP in high EMI environments

21
Q

Cat Ratings

A
  • indicates the highest frequency the cable can handle

- rated in megahertz (MHz)

22
Q

CAT 3

A
  • 16 MHz

- 16 Mbps

23
Q

CAT 5

A
  • 100 MHz

- 100 Mbps

24
Q

CAT 5e

A
  • 100 MHz
  • 1 Gbps
  • most common today
25
Q

CAT 6

A
  • 250 MHz

- 10 Gbps

26
Q

CAT 6a

A
  • 500 MHz

- 10 Gbps

27
Q

CAT 7

A
  • 600 MHz

- 10+ Gbps

28
Q

RJ-11

A
  • telephone wires

- 2 pairs UTP

29
Q

RJ-45

A
  • network wires

- 4 pairs

30
Q

Fiber-optic benefits

A
  • not effected by EMI

- long-distance transmissions

31
Q

Fiber-optic Cable

A
  • core - the glass fiber
  • cladding - makes the light reflect down the core
  • buffer - gives wire strength
  • insulating jacket
32
Q

How are fiber-optic cables meausred?

A
  • core/cladding size

- in micrometers

33
Q

Duplex Cable

A

two pairs of fiber-optic wires fused together, one for sending and one for recieving

34
Q

MMF Cable

A

Multimode Fiber

  • uses LEDs as light source
  • 850 nanometer wavelength
35
Q

SMF Cable

A

Singlemode Fiber

  • uses lasers as light source
  • prevents modal distortion
  • 1310 or 1550 nanometer wavelength
36
Q

Modal Distortion

A

signals sent at the same time don’t arrive at the same time because the path differ slightly in length

37
Q

Fiber Optic Connectors

A
  • ST - (snap and twist)
  • SC - (stick and click)
  • LC - duplex (little connector)
  • MT-RJ - duplex
38
Q

DB-9 connector

A
  • serial 9-pin

- 56 kbps

39
Q

DB-25 connector

A
  • parallel 25-pin

- 2 Mbps

40
Q

Cable and Fire Ratings

A

PVC - no protection from smoke and fumes
Riser - for vertical runs, some protection
Plenum - more protection than riser

Network+ (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions