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Prof. Messer > memorization > Flashcards

memorization Flashcards

1
Q

• Non-ephemeral ports – permanent port numbers(range)

A
  • Ports 0 through 1,023

* Usually on a server or service

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2
Q

• Ephemeral ports – temporary port numbers(range)

A
  • Ports 1,024 through 65,535

* Determined in real-time by the client

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3
Q

FTP – File Transfer Protocol

A
  • tcp/20 (active mode data), tcp/21 (control)

* Transfers files between systems

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4
Q

SSH - Secure Shell

A
  • Encrypted communication link - tcp/22

* Looks and acts the same as Telnet

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5
Q

Telnet port, protocol and use:

A
  • Telnet – Telecommunication Network - tcp/23
  • Login to devices remotely
  • Console access
  • In-the-clear communication
  • Not the best choice for production systems
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6
Q

SMTP - Simple Mail Transfer Protocol

A

• Server to server email transfer - tcp/25
• Also used to send mail from a device to a mail server
• Commonly configured on mobile devices
and email clients

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7
Q

DNS - Domain Name System

A

• Converts names to IP addresses - udp/53

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8
Q

HTTP and HTTPS ports and protocols and uses

A
  • Hypertext Transfer Protocol - tcp/80
  • Communication in the browser
  • And by other applications
  • In the clear or encrypted - HTTPS - tcp/443
  • Supported by nearly all web servers and clients
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9
Q

POP / IMAP port number, protocol and uses

A 
• Receive emails from an email server
• Authenticate and transfer
• POP3 - Post office Protocol version 3 - tcp/110
• Basic mail transfer functionality
• IMAP4
• Internet Message Access Protocol v4 - tcp/143
• Includes management of email inbox
from multiple clients
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10
Q

RDP - Remote Desktop Protocol

A

• Share a desktop from a remote location over tcp/3389
• Remote Desktop Services on many Windows versions
• Can connect to an entire desktop
or just an application

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11
Q

SMB- protocols, ports and uses:

A
  • SMB tcp/445 (NetBIOS-less) Protocol used by Microsoft Windows
  • File sharing, printer sharing
  • Also called CIFS (Common Internet File System)
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12
Q

AFP (Apple Filing Protocol)

A
  • File services in macOS

* tcp/548

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13
Q

SLP (Service Location Protocol)port, protocol and uses:

A
  • tcp/427 and udp/427
  • Populates the list of available devices
  • File management
  • Copy, move, delete files
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14
Q

DHCP - Dynamic Host Configuration Protocol

A

• Automated configuration of IP address, subnet mask
and other options
• udp/67, udp/68

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15
Q

LDAP (Lightweight Directory Access Protocol)

A
  • tcp/389
  • Store and retrieve information in a network directory
  • Commonly used in Microsoft Active Directory
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16
Q

SNMP - Simple Network Management Protocol

uses, port # and protocol:

A
  • Gather statistics from network devices
  • Queries: udp/161
  • Traps: udp/162
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17
Q

Sends and receives files between systems tcp/20, tcp21

A

FTP/ File Transfer Protocol

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18
Q

Encrypted console access tcp/22

A

SSH/ Secure Shell

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19
Q

Insecure console access tcp/23

A

Telnet /Telecommunication Network

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20
Q

Transfer email between mail servers tcp/25

A

SMTP/ Simple Mail Transfer Protocol

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21
Q

Convert domain names to IP addresses udp/53, tcp/53

A

DNS/ Domain Name System

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22
Q

Web server communication tcp/80

A

HTTP/ Hypertext Transfer Protocol

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23
Q

Web server communication with encryption tcp/443

A

HTTPS/ Hypertext Transfer Protocol Secure

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24
Q

Receive email into a email client tcp/110

A

POP3/ Post Office Protocol version 3

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25
Q

A newer email client protocol tcp/143

A

IMAP4/ Internet Message Access Protocol v4

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26
Q

Graphical display of remote devices tcp/3389

A

RDP/ Remote Desktop Protocol

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27
Q

Register, remove, and find Windows services by name udp/137

A

NetBIOS/ NetBIOS name service

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28
Q

Windows connectionless data transfer udp/138

A

NetBIOS/ NetBIOS datagram service

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29
Q

Windows connection-oriented data transfer tcp/139

A

NetBIOS/ NetBIOS session service

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30
Q

Windows file transfers and printer sharing tcp/445

A

SMB/ Server Message Block

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31
Q

Mac OS file transfers tcp/548

A

AFP/ Apple Filing Protocol

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32
Q

Find Mac OS services by name tcp/427, udp/427

A

SLP/ Service Location Protocol

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33
Q

Automate the IP address configuration process udp/67, udp/68

A

DHCP/ Dynamic Host Configuration Protocol

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34
Q

Directory services tcp/389

A

LDAP/ Lightweight Directory Access Protocol

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35
Q

Gather metrics and manage network devices udp/161

A

SNMP/ Simple Network Management Protocol

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36
Q

Cable modem speeds

A

High-speed networking
• 4 Mbits/s through 250 Mbits/s are common
• Gigabit speeds are possible

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37
Q

DSL modem speeds

A

• ~10,000 foot limitation from the central office (CO)
• 52 Mbit/s downstream / 16 Mbit/s upstream
are common
• Faster speeds may be possible if closer to the CO

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38
Q

Ethernet over Power (EOP) speeds

A
  • Also called Power-line communication (PLC)
  • IEEE standard 1901
  • 500 megabits per second
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39
Q

802.11a throughput

A
  • Operates in the 5 GHz range

* 54 megabits per second (Mbit/s)

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40
Q
  • Operates in the 5 GHz range

* 54 megabits per second (Mbit/s)

A

802.11a

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41
Q

802.11b

A 
• Operates in the 2.4 GHz range
• 11 megabits per second (Mbit/s)
• Better range than 802.11a
• Less absorption problems
• More frequency conflict
• Baby monitors, cordless phones,
microwave ovens, Bluetooth
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42
Q 
• Operates in the 2.4 GHz range
• 11 megabits per second (Mbit/s)
• Better range than 802.11a
• Less absorption problems
• More frequency conflict
• Baby monitors, cordless phones,
microwave ovens, Bluetooth
A

802.11b

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43
Q

802.11g throughput and details:

A
  • Operates in the 2.4 GHz range
  • 54 megabits per second (Mbit/s)
  • Same as 802.11a (but a little bit less throughput)
  • Backwards-compatible with 802.11b
  • Same frequency conflict problems as 802.11b
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44
Q
  • Operates in the 2.4 GHz range
  • 54 megabits per second (Mbit/s)
  • Same as 802.11a (but a little bit less throughput)
  • Backwards-compatible with 802.11b
  • Same frequency conflict problems as 802.11b
A

802.11g

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45
Q

802.11n specifications:

A 
• Operates at 5 GHz and/or 2.4 GHz
• 40 MHz channel widths
• 600 megabits per second (Mbit/s)
• 40 MHz mode and 4 antennas
 uses MIMO
• Multiple-input multiple-output
• Multiple transmit and receive antennas
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46
Q 
• Operates at 5 GHz and/or 2.4 GHz
• 40 MHz channel widths
• 600 megabits per second (Mbit/s)
• 40 MHz mode and 4 antennas
 uses MIMO
• Multiple-input multiple-output
• Multiple transmit and receive antennas
A

802.11n

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47
Q

802.11ac throughput and details:

A

• Operates in the 5 GHz band
• Less crowded, more frequencies
(up to 160 MHz channel bandwidth)
• Increased channel bonding - Larger bandwidth usage
• Denser signaling modulation - Faster data transfers
• Eight MU-MIMO streams
• Nearly 7 gigabits per second

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48
Q

• Operates in the 5 GHz band
• Less crowded, more frequencies
(up to 160 MHz channel bandwidth)
• Increased channel bonding - Larger bandwidth usage
• Denser signaling modulation - Faster data transfers
• Eight MU-MIMO streams
• Nearly 7 gigabits per second

A

802.11ac

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49
Q

Zigbee throughput:

A
  • Uses the ISM band
  • Industrial, Scientific, and Medical
  • 900 MHz and 2.4 GHz frequencies
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50
Q

Z-Wave throughput

A 
• Uses the ISM band
• Industrial, Scientific,
and Medical
• 900 MHz frequencies in the US
• No conflicts with 802.11
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51
Q 
• Uses the ISM band
• Industrial, Scientific,
and Medical
• 900 MHz frequencies in the US
• No conflicts with 802.11
A

Z-Wave

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52
Q
  • Uses the ISM band
  • Industrial, Scientific, and Medical
  • 900 MHz and 2.4 GHz frequencies
A

Zigbee

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53
Q

Dialup speeds

A
  • 56 kbit/s modems
  • Compression up to 320 kbit/s
  • Relatively slow throughput
54
Q

Satellite networking speeds

A
  • High cost relative to terrestrial networking
  • 50 Mbit/s down, 3 Mbit/s up are common
  • High frequencies - 2 GHz
  • Line of sight, rain fade
55
Q

10BASE-T cable category and distance

A

Category 3 / 100 meters

56
Q

Ethernet standard for: Category 3 / 100 meters

A

10BASE-T

57
Q

100BASE-TX,

1000BASE-T cable category and distance

A

Category 5,5e/ 100 meters

58
Q

Ethernet standard for: Category 5,5e/ 100 meters

A

100BASE-TX,

1000BASE-T

59
Q

10GBASE-T cable category and distance

A

Category 6/ 37 to 55 meters

60
Q

Ethernet standard for: Category 6/ 37 to 55 meters

A

10GBASE-T

61
Q

10GBASE-T(augmented) cable category and distance

A

Category 6A/ 100 meter

augmented

62
Q

Ethernet standard for: Category 6A/ 100 meter

augmented

A

10GBASE-T

63
Q

TIA/EIA 568A • Pin assignments

A

white & green, green, white & orange, blue, white & blue, orange, white & brown, brown

64
Q

• Pin assignments white & green, green, white & orange, blue, white & blue, orange, white & brown, brown

A

TIA/EIA 568A

65
Q

TIA/EIA 568B • Pin assignments

A

white & orange, orange, white & green, blue, white& blue, green, white & brown, brown

66
Q

• Pin assignments white & orange, orange, white & green, blue, white& blue, green, white & brown, brown

A

TIA/EIA 568B

67
Q

• Thunderbolt v1 throughput

A
  • Two channels
  • 10 Gbit/s per channel
  • 20 Gbit/s total throughput
68
Q

• Two channels
• 10 Gbit/s per channel
• 20 Gbit/s total throughput
what connector is this?

A

• Thunderbolt v1 throughput

69
Q

• Thunderbolt v2 throughput

A
  • 20 Gbit/s aggregated channels

* Mini DisplayPort connector

70
Q
  • 20 Gbit/s aggregated channels

* Mini DisplayPort connector

A

• Thunderbolt v2 throughput

71
Q

• Thunderbolt v3 throughput

A
  • 40 Gbit/s aggregated throughput
  • USB-C connector
  • Maximum 3 meters (copper)
  • 60 meters (optical), daisy-chain up to 6 devices
72
Q
  • 40 Gbit/s aggregated throughput
  • USB-C connector
  • Maximum 3 meters (copper)
  • 60 meters (optical), daisy-chain up to 6 devices
A

• Thunderbolt v3 throughput

73
Q

• USB 1.1 throughput

A
  • Low speed: 1.5 megabits per second, 3 meters

* Full speed: 12 megabits per second, 5 meters

74
Q
  • Low speed: 1.5 megabits per second, 3 meters

* Full speed: 12 megabits per second, 5 meters

A

• USB 1.1 throughput

75
Q

• USB 2.0 throughput

A

480 megabits per second, 5 meters

76
Q

480 megabits per second, 5 meters

throughput for which USB?

A

• USB 2.0 throughput

77
Q

• USB 3.0 - SuperSpeed throughput

A

5 gigabits per second, ~3 meters

• Standard does not specify a cable length

78
Q

5 gigabits per second, ~3 meters

• Standard does not specify a cable length

A

• USB 3.0 - SuperSpeed throughput

79
Q

• USB 3.1 SuperSpeed+ throughput

A

• 10 Gbit/sec

80
Q

10 Gbit/sec USB throughput

A

USB 3.1 SuperSpeed+

81
Q

• USB 3.2 throughput

A
  • SuperSpeed+ over a USB-C connector

* 10 Gbit/sec and 20 Gbit/sec

82
Q
  • SuperSpeed+ over a USB-C connector

* 10 Gbit/sec and 20 Gbit/sec

A

• USB 3.2 throughput

83
Q

• SATA Revision 1.0 throughput

A

• 1.5 Gbit/s, 1 meter

84
Q

• SATA Revision 2.0 throughput

A

• 3.0 Gbit/s, 1 meter

85
Q

• SATA Revision 3.0 throughput

A

SATA 6.0 Gbit/s, 1 meter

86
Q

• SATA Revision 3.2 throughput

A

• 16 Gbit/s, 1 meter

87
Q

• CD-ROM (Compact Disc ROM) storage capacity:

A

• 700 megabytes (MB) capacity

88
Q

• DVD-ROM (Digital Versatile Disc) single and dual layer throughputs

A
  • 4.7 gigabytes (GB) for single-layer

* 8.5 GB for dual-layer

89
Q

• Blu-ray Disc single and dual layer throughput:

A

• 25 GB for single-layer, 50 GB for dual-layer

90
Q

M.2 interface throughput

A

• Can use a PCI Express bus connection
• 4 GByte/second
throughput or faster

91
Q

• RAID 0

A

– Striping

92
Q

– Striping

A

• RAID 0

93
Q

• RAID 1

A
  • Mirroring
94
Q
  • Mirroring

which RAID level:

A

• RAID 1

95
Q

•Describe RAID 5

A

– Striping with Parity

96
Q

– Striping with Parity

which RAID level:

A

• RAID 5

97
Q

• Nested RAID - RAID 1+0 (a.k.a. RAID 10)

describe:

A

• A stripe of mirrors

98
Q

+12 V used on:

A

• PCIe adapters, hard drive motors, cooling fans,

most modern components

99
Q

+5 V used on:

A

Some motherboard components

• Many components are now using +3.3 V

100
Q

+3.3 V used on which components:

A

• M.2 slots, RAM slots, motherboard logic circuits

101
Q

-12 V is used on which components?

A
  • Integrated LAN
  • Older serial ports
  • Some PCI cards
102
Q

-5 V used on which components?

A
  • Available for ISA adapter cards
  • Most cards didn’t use it
  • Today’s motherboards don’t have ISA slots
103
Q

Gaming PC component needs:

A
  • SSD
  • Fast start and load times
  • High-end video/specialized GPU
  • Graphically complex
  • High definition sound card
  • Multiple layers, atmosphere
  • High-end cooling
  • High utilization for hours at a time
104
Q

Standard thick client component needs:

A 
• Desktop applications
• Executable programs running in
local memory and using local CPU
• Meets recommended requirements for
running the operating system
• CPU, total RAM, disk space
105
Q

Thin client component needs:

A

• Basic application usage

106
Q

Network attached storage device component needs:

A
  • NAS - Access from anywhere
  • Media streaming - Central location
  • File sharing - Easy access
  • Gigabit NIC - High speed transfers
  • RAID array - Redundant hard drives
107
Q

• “Painted” with a laser
• Picks up toner - Transfers toner to the paper
• Can be separate from the toner cartridge or combined
which printer part is this?

A

Imaging drum

108
Q

• Heat and pressure - Melt plastic toner powder
• Permanently bond toner to paper
What printer part is this?

A

Fuser assembly

109
Q

Pickup paper - Should be a single page at a time
• Problems if no paper is picked up
or multiple sheets are picked
• Should be periodically cleaned or replaced
what printer part is this?

A

Pickup rollers

110
Q

Pull just the top sheet from the paper tray
• Not multiple sheets
• Small and inexpensive - Easy to clean or replace
What printer part is this?

A

Separation pad

111
Q 
Printing on both sides is a two step process
• Print side one, print side two
• You need mechanisms to “flip” the page
• Automatically
• Can be built-in to the printer
• Or available as an add-on
What part of the printer is this?
A

Duplexing assembly

112
Q

• Build the entire page in memory

A

Step 1: Processing

113
Q

Step 1: of printing

A

Processing

114
Q

Prepare the drum with a
negative electrostatic charge
which printing step:

A

Step 2: Charging

115
Q

Step 2:

A

Charging

116
Q

• Write the image with the laser

what print step is this?

A

Step 3: Exposing

117
Q

Step 3 of printing process:

A

Exposing

118
Q

Add toner to the charged areas
of the imaging drum
what printing stage is this?

A

Step 4: Developing

119
Q

Step 4 of the printing process:

A

Developing

120
Q

• Move the toner from

the drum to the paper

A

Step 5: Transferring

121
Q

Step 5:

A

Transferring

122
Q

• Heat and pressure during this printing step:

A

Step 6: Fusing

123
Q

Step 6:

A

Fusing

124
Q

• Remove excess toner

what printing process:

A

Step 7: Cleaning

125
Q

Step 7 of the printing process:

A

Cleaning

126
Q

troubleshooting step: 1

A 
Identify the problem
• Information gathering
• Get as many details as possible
• Duplicate the issue, if possible
• Backup everything
127
Q

troubleshooting step: 2

A

Establish a theory
• Start with the obvious
• Make a list of all possible causes
• Start with the easy theories

128
Q

troubleshooting step: 3

A

Test the theory
• Confirm the theory
• Determine next steps to resolve problem
• Call an expert

129
Q

troubleshooting step: 4

A 
Create a plan of action
• Build the plan
• Correct the issue with a minimum of impact
• Some issues can’t be resolved
during production hours
130
Q

troubleshooting step: 5

A 
Implement the solution
• Fix the issue
• Implement during the change control window
• Escalate as necessary
• You may need help from a 3rd party
131
Q

troubleshooting step: 6

A 
Verify full system functionality
• It’s not fixed until it’s really fixed
• The test should be part of your plan
• Have your customer confirm the fix
• Implement preventative measures
• Let’s avoid this issue in the future
132
Q

troubleshooting step: 7

A 
Document findings
• It’s not over until you build the knowledge base
• Don’t lose valuable knowledge!
• What action did you take?
• What outcome did it have?

Prof. Messer (2 decks)

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