3.1 Cables

Question 1

• Balanced pair operation
  – Two wires with equal and opposite signals
  – Transmit+, Transmit- / Receive+, Receive-
• The twist is the secret!
  – Keeps a single wire constantly moving
  away from the interference
  – The opposite signals are compared on the other end
• Pairs in the same cable have different twist rates

Answer 1

Twisted pair copper cabling

Question 2

The jacket that is around an ethernet cable is commonly made of

Answer 2

PVC / polyvinyl chloride.

Question 3

used in television/digital cable
– And high-speed Internet over cable

Answer 3

RG-6

Question 4

RG-6 is a

Answer 4

Coaxial cable

Question 5

– No additional shielding
– The most common twisted pair cabling

Most likely use at home

Answer 5

• UTP (Unshielded Twisted Pair)

Question 6

– Additional shielding protects against interference
– Shield each pair and/or the overall cable
– Requires the cable to be grounded

Answer 6

• STP (Shielded Twisted Pair)

Question 7

– U =

If you look at the outside of an ethernet cable, you’ll see some writing that describes what type of cable is on the inside

Answer 7

Unshielded

Question 8

If you look at the outside of an ethernet cable, you’ll see some writing that describes what type of cable is on the inside

– S =

Answer 8

Braided shielding

Question 9

If you look at the outside of an ethernet cable, you’ll see some writing that describes what type of cable is on the inside

Answer 9

Foil shielding

Question 10

– Braided shielding around the entire cable and foil around the pairs is

Answer 10

S/FTP

Question 11

For example ,
– Foil around the cable and no shielding around
the pairs is

Answer 11

F/UTP

Question 12

this VGA signal is an analog signal. So as you extend this VGA signal beyond ______meters, you’ll see that the screen becomes fuzzier and more difficult to see as that signal degrades.

Answer 12

5 - 10 , DB/DE- 15

Question 13

• Video and audio stream
  –All digital, no analog
  –~ 20 meter distance before losing too much signal
• 19-pin (Type A) connector
  –Proprietary connector

Answer 13

HDMI (High-Definition Multimedia Interface)

Question 14

. If you’re using the larger ______interface, you’ll notice that there are hooks connected to this particular interface that lock that into place. So you can’t simply pull it out of a ______interface. You’ll need to push down on a release mechanism and then it can easily be removed from that ______interface.

Answer 14

DisplayPort

Question 15

• Digital information sent in packetized form

   –Like Ethernet and PCI Express 
  –Carries both audio and video

• Compatible with HDMI and DVI
  –Passive adapter
  –DisplayPort -> HDMI
  –DisplayPort -> DVI

Answer 15

DisplayPort

Question 16

• Single and dual link
  –Single link; 3.7 Gbps (HDTV at 60 fps)
  –Dual link; 7.4 Gbps (HDTV at 85 fps)
  –No audio support
• ____-A –Analog signals
• ____-D –Digital signals
• ____-I –Integrated –Digital and analog in the same connector

Answer 16

DVI (Digital Visual Interface)

Question 17

is an integrated connection which allows for both digital and analog communication in the same connector.

Answer 17

DVI (Digital Visual Interface)

Question 17

• ______Revision 1.0
• ______1.5 Gbit/s, 1 meter

Answer 17

SATA

Question 17

• ______Revision 2.0
• ______3.0 Gbit/s, 1 meter

Answer 17

SATA

Question 17

• ______Revision 3.2
• ______16 Gbit/s, 1 meter

Answer 17

SATA

Question 17

• ______Revision 3.0
• ______6.0 Gbit/s, 1 meter

Answer 17

SATA

Question 18

–Matches the ______version - 2 meters

Answer 18

external SATA

Question 19

Data Connection:

Single ______cable connects to a single ______port on the motherboard, providing data transfer capabilities for a single storage device.
Power Connection:

Single ______power cable connects to a single ______power port on the storage device, supplying power for that specific storage drive.

Answer 19

SATA

Question 20

• Very intelligent interface functionality
  –Much of the difficult configuration work is done between the __devices
• Industry longevity

–Well supported in the enterprise
–A standard drive for virtual systems __ID and logical unit (LUN)

• Every __device on a single bus is assigned a separate ID number
  – __ID 0 ( __controller), ID 2 (hard drive), ID 3 (CD-ROM)
• Logical units (LUNs) are defined within each __ID
  –Separate drives in a storage array or virtual machine
• The signal at the “end” of a physical __bus is terminated
  –Can be internal to the device or a separate termination device
• Serial attached __(SAS) devices have no jumpers, terminators, or settings

Answer 20

SCSI

Question 21

–Not really “small” any longer * Originally designed to string many peripherals together onto a single cable/controller –Up to 16 devices in a __ “chain” * Many different formats –Fast __, Ultra __, Ultra Wide __, Ultra2 __, –Ultra3 __, Ultra-320 __, Ultra-640 __ , –i __ ( __ over IP) * Parallel and serial options __ advantages * Not just for hard drives –Scanners, tape drives, CD-ROM drives * Many devices on a single bus –8 on narrow bus, 16 on wide bus

Answer 21

SCSI

Question 22

40 wire cable, the first device that you would connect is referred to as device 0 in the ___standard. And the device connecting on the end of the cable is device 1 .

Answer 22

PATA/ide

Question 23

The 40 wire cable was the original __cable. And then as we increase the speeds for __, we needed some way to decrease the amount of crosstalk between all of these wires, so we doubled the number of wires while keeping the number of pins on the connectors exactly the same. And this minimizes the crosstalk over these higher speeds that are used over 80 wire cables.

Answer 23

PATA/ide

Question 24

40 pin connector is symmetrical. So that missing pin allows us to properly orient the cable into the right format when we’re plugging it into that connector. You might also notice there’s a notch at the bottom as well, which also helps when orienting the cable.

Answer 24

PATA/ide

Question 25

If you have cable television, then you’re probably familiar with the ____This connector is used on a coaxial cable. And it has a threaded connection at the end to physically screw onto the connection so that it can’t easily pull off of the device.

Answer 25

F- Connector

Question 26

* Registered Jack type 45 * 8 position, 8 conductor (8P8C) –Modular connector - Ethernet

Answer 26

RJ45 connector

Question 27

* 6 position, 2 conductor (6P2C) –Some cables will wire additional conductors –Telephone or DSL connection

Answer 27

RJ11 connector

Question 28

* Wire-to-wire patch panel –No intermediate interface required * Wires are “punched” into the block –Connecting block is on top * Additional wires punched into connecting block –Patch the top to the bottom

Answer 28

Punchdown block

Question 29

* 24-pin double-sided USB connector –Used for both hosts and devices * Used for USB, Thunderbolt –Interface is the same, signal can vary

Answer 29

USB-C

Question 30

* 4-pin peripheral power connector –AMP MATE-N-LOK –Provides +12 V and +5 V * Power for many devices in the computer case –Storage devices –Optical drives –Fans –Other peripherals

Answer 30

Molex connector

Question 31

* Apple proprietary –8-pin digital signals –iPhone, iPad, iPod devices * Some advantages over Micro-USB –Higher power output for phones and tablets –Can be inserted either way

Answer 31

Lightning

Question 32

* D-subminiature or D-sub –The letter refers to the connector size * Commonly used for RS-232 –Recommended Standard 232 –An industry standard since 1969 * Serial communications standard –Built for modem communication –Used for modems, printers, mice, networking * Now used as a configuration port –Management or Console port

Answer 32

DB-9

Question 33

The __connector is commonly used for switches, routers, and other infrastructure devices

Answer 33

DB-9

Question 34

* Memory types have changed through the years –Driven by standardization and technology * One of the most important components of your computer –Speed, speed, speed * Every motherboard is different –Check your documentation

Answer 34

RAM (Random Access Memory) slots

Question 35

–About half the width as a DIMM * Used in laptops and mobile devices

Answer 35

SO-DIMM / Small Outline Dual In-line Memory Module

Question 36

* The memory on the DIMM * Dynamic – Needs constant refreshing – Without refreshing, the data in memory disappears * Random access – Any storage location can be accessed directly – Unlike magnetic tape

Answer 36

Dynamic Random Access Memory (DRAM)

Question 37

* ____is synchronous with the common system clock – Queue up one process while waiting for another – Classic DRAM didn’t wait for a clock signal

Answer 37

Synchronous DRAM (SDRAM)

Question 38

* Twice the data rate of DDR2 – Larger chip capacities - Maximum 16 GB per DIMM * No backwards compatibility – Speed brings sacrifice

Answer 38

Double Data Rate 3 (DDR3) SDRAM

Question 39

* Speed increases over DDR3 – Faster frequencies – Maximum 64 GB per DIMM * Again, no backwards compatibility

Answer 39

Double Data Rate 4 (DDR4) SDRAM

Question 40

* Faster data transfers between the memory module and motherboard – Maximum of 64 GB per DIMM * The key has moved - No backwards compatibility

Answer 40

Double Data Rate 5 (DDR5) SDRAM

Question 41

* Different names - Virtual RAM, swap file, etc. * Swap currently unused application data to storage – Free up space for other applications * Managed automatically by the operating system – Some configuration settings are available

Answer 41

Virtual memory

Question 42

* Dual-channel, triple-channel, or quad-channel * Memory combinations should match – Exact matches are best * Memory module slots are often colored differently

Answer 42

Multi-channel memory

Question 43

* Used on critical computer systems – VM servers, database servers, any server * Parity memory – Adds an additional parity bit – Won’t always detect an error – Can’t correct an error * Error Correcting Code (ECC) – Detects errors and corrects on the fly – Not all systems use ECC – It looks the same as non-ECC memory

Answer 43

Memory that checks itself