•
800080
1001
Started
2/12/21
•
•
•
-
1.0 Mobile devices -14.1
2.0
Networking
3.0 Hardware
20%
-
-27-1
.
pg
3-9
Pg
10-21
.
pg 22-35
•
4.0 Virtualization & Cloud
•
5.0
Hardware
90 questions , 90
Computing
-12-1
.
pg
& Network Troubleshooting -27-1
minutes
.
,
675
passing
2
score
,
exams
36-38
pg 39-45
1. I Mobile Devices
Hard Drives :
SSD : lower temps , small power
•
•
1ms
HDD : hot
•
2- 5 -1
•
a cess
,
time
high
failure ,
.
51
.
.
failure rate
.
power
,
more
cons no
,
moving
storage
,
,
less
parts
,
moving
storage
more
,
,
no
more
noise
,
noise ,
51$
5.5 -3.0ms
,
cheaper
non Votitile
-
Memory
•
*
(RAM) :
Volt tile
Very
fast
Mini PCIe
•
•
how older
laptops
connect
Video , cellular 's Wifi cards
connect
DC Jack
•
Where
Batteries
•
Nickel
from for
cadmium (Ni Cd)
(Li
•
Lithium-ion
•
Nickel metal
-
comes
power
-
)
ion
Hydride ( NiMH )
through
mini
motherboard
pcie
connectors
I 2 Display
of Laptop
.
of
Displays
TypesLCD
vs
OLED
:
•
.
-
LCD
light
-
-
liquid crystal
-
OLED
-
-
thin
,
,
backlight bright
,
organic light emitting
light
thin
,
,
diode supplies
wifi At enna ( internal
•
display
cards)
located around the
diodes
light
,
contrast
screens
inverter
⑧
Component for
for
•
backlight
Cause for
1. 3
•
•
if
youre
LCD
lighting
,
takes
Dc
and
inverts it to AC
.
flickers
or
dimming
Laptop Features
using bluetooth turn
not
,
it
off
displays wireless cellular on/off Volume settings
GPS On/off
screen
keyboard
brightness blutoothltoclchpadl
Dual
,
,
,
,
,
backlighting
,
docking
Screen orientation media airplane
stations ,
removable
,
port
screen
,
replicator
,
,
cable
look
,
mode,
rotating /
Mobile
1. 4
Tablets :
•
portable ,
good battery
Smartphones
•
,
Devices
no
high processing
,
,
,
•
,
,
task w/
little
E- Readers :
Kindle fire ,
GPS
•
than
,
wearable devices :
popular smart watch small
•
storueehn
:
portable common good battery less powerful
laptop small screen good resolution
,
,
losing popularity
losing popularity
,
low
,
low
processing
preform ance
preform a rice
1. 5 Ports
•
of Mobile Devices
Connection
Types
wired
men
Egg
BSE
ftp.qa.ae
Emma
USB / Micro USB 1 Mini USB 1USD
-
enormous
.
"
Tethering
connecting
-
IPhone
'
-
'
a
,
NFC
Samsung
wireless
(tesla
charger)
connectivity
Bluetooth
•
•
•
'
'
better
IR
range
than NFC , 30
infrared
line
of
Hotspot
share
sight
C
device to another
render specific ports
•
-
-
-
-
to
see
connection
-
100ft
system
Network connectivity
1. 6
Port :
POP 3
Us 110
:
Post office
•
-
set of
from
a
protocol
rules
that store and
the
server to
I device
Only
•
s : 995
,
retrieve
your
emails
client
connectivity
-
contrast
to
IMAP
port , server information authentication
•
,
IMAP
5993
us : 143
internet
•
-
set of
from
•
that store and
the
server to
folder creation
on
retrieve
your
emails
client
server
multiple devices
,
can
information
retrieve
•
a
rules
protocol
access
message
port , server information authentication
,
Port and SSL
sports
-
are
path of
Socket
•
•
-
clients
Secure socket
diff
and
into lout
of
servers
to
layer
.
(SSL )
system
communicate
22 : 3389
)
use for
secure
Comm
.
client di Server (TLS)
settings
SIMIME
doors
Ipt Port ( 192.168.10
between
•
settings
like
use
different ports
for clients
osecurelmutti purpose internet mail extensions
digitally signed a encrypted messages
-
PRI h PRL Updates / Baseband updates
product release instruction
settings for config items on device specific
PRI updates
•
-
→
.
the
network its
PRL updates
•
-
•
Radio
•
IMEI
on
list
preferred
connect
roaming
cell
proper
phone
tower while
Baseband updates
-
-
-
update
of the
is
special
update security
vs
•
.
"
sub OS
that
IMEI of all
IMSI
Seru
.
instructions
not
"
"
OS
manages
for
roaming
wireless
Comm
.
hardware
updates
IMSI
known
•
"
Firmware
Firmware
to
Mobile stations
are
stored
in
db
EIR (equipment identification register )
number to mobile
user
by telecom
as
provider
.
or
carrier
-
stored
in
Sim
card
VPN
'
Virtual
private network
using public
internet
as
transmission
media
but
secure
Synchronization
1. 7
sync
to
•
sync
cloud
popular photos contacts
,
desktop
issues w/ Cloud copies
to
-
to
•
connection
automobile
bluetooth
to
contacts
sync
Mutual authentication for
•
-
local , wired ( wireless
are
,
sync
being updated
music emails
Single sign
provide
on
multiple
services
SSO
credentials
once
,
shared
info
across
software requirements to install Apps
Software requirements for the apps w/
•
•
Storage
connection
-
space
types
usually
tethering , wired
vs
.
sync
.
problem
enable
to
PC
network
sync
wireless
quiz :
•
function keys
-
letter
keys
non roti tile - HDD
-
,
,
GPS
-
global
positioning
system
Networking
2. 1
TCP da UDP ports
protocols
,
FTP File transfer protocol
Used to
•
Port 20 (data) 21
SSH secure shell
'
•
•
-
•
Secure
files to
local
move
( connection )
replacement
server
Uh secure Tcp
,
,
for
remote connections to
server
Used
proto
to
port
22
other
secure
Telnet
unsecure
or
devices
networking
FTP Scp
.
,
TCP
,
Telnet
Unsecure
•
plain text
Used to make
port 23 TCP
'
•
remote
Conn
.
Telnet server
to
networking
,
SMTP
•
simple
•
TCP
email
,
•
,
•
server
resolve
port 53 TCP &
hypertext
hostname
to
IP
address
UDP
transfer protocol
Used to surf
•
sending
web
port 80 TCP
,
POP
3. retrieve
•
to
servers
name
Used to
HTTP
for
Port 25
DNS Domain
-
device
mail transfer protocol
Sends email for you , responsible
diff
or
emails
port 110 , TCP
,
I device
(cut
not
copy )
-
MFTRSOA
'
SR"
IMAP internet message
retrieve
•
•
port
HTTPS
•
RDP
leaves
copy
server
on
143 , TCP
Https using secure protocol
like
SSL
TLS
or
encrypt
port 443 ,
Used
remote
to
not
-
TCP
desktop protocol
remote
•
,
HTTP secure
to
•
emails
protocol
access
like
Telnet
connect to
is
which
command
server
line
,
or
this
desktop
gives gui
port 3389 TCP
•
.
Net BIOSINETBT Net basic input output service
Used to talk over LAN , used in windows for
•
file (printer
providing
•
share
.
rel
services
Session
.
layer
051
model
,
allow
apps on separate comp to talk over LAN
sport 137 (UDP) 139 (TCP)
SMB ( CI FS Server message blocks 40mm on internet FS
.
•
Client
-
server
printers
,
serial
Comm
ports
,
.
protocol for
etc
.
On
sharing
access
files
network
sport 445 , TCP
.CI FS part
of
SMB where
Ms
tried
supporting
other
SLP Service location protocol
•
•
Allows
have
AFP Apple
•
•
file
to have
filing
URL
,
427
protocol
services for
548 , TCP
find
devices to
macos
services
in
LAN
w/o
config
OS
dynamic
DHCP
host
config
.
protocol
provides IP host w/ IP address h subnet 4
port 67 Server end , 68 Client end VDP
•
•
gateway
etc
.
,
LDAP lightweight directory
Client server for
•
-
-
Active
directory
access
protocol
accessing directory
,
place to store
services
username
d. password
sport 389 TCP
,
SNMP Simple network management protocol
Collect 4 Organize info managed devices on
modifying to change device behavior
port 161 (get ) 162 ( trap) TCP
•
IP net for
-
,
TCP
•
vs
UDP
.
Transmission
Tcp : reliable
4-
way
larger
control
,
Protocol
Way handshake (SYN
3
UDP unreliable Send it and
* port
.
error
# to note
SSH
→
22
rdp
→
3389
Https
→
443
User
>
Datagram Protocol
SYNIACK > ACK)
shutdown process (FIN > ACK> FIN > ACK)
header than UDP
:
no
VS.
correction
forget it good
,
for
streaming
,
Network Hardware
2. 2
Devices
Routers
Layer
'
•
'
model based
3 On OSI
moving
-
data from one
creates tables for
Layer
r
•
•
-
2
-
based off
extends network
managed
unmanaged
-
called
hardware
Ipv 4
IPv6
interface
to
addressing
broadcast network
and
hub
addressing
data from interface
network admins to
-
Ip
network to another network
moving
switches
off
,
no
config
port, Sec , VLAN
IP
.
remmaonatgee
decisions
Access point
devices to connect to wireless network
router
SoHo users
Usually have access pointtwireless
Cloud Based Network controller
'
•
•
'
software based
Software defined net Manipulates data
Cloud based for centralized control
network
more
.
'
Firewall
filters traffic
'
•
•
operate
based
•
•
soft
.
,
card
l
system
,
network protects all
devices connect to
Mac address hard coded on card
NIC
using
coming in lout your network
on
addressing content or context
host based protects
Network interface
planes
allow
,
network
Repeater
that
anything
the
signal
can
pass
a
signal
and
regen
Hub
layer
'
I
works
•
,
has
as
place
no
a
repeater
cable IDSL Modem
-
take
signal
Bridge
tiny
•
signal
in
switch , 2 4
patch Panel
located
-
-
power
-
over
deploy
•
power
in
ISP
convert
to
usable
ports
collisions
LAN
Comm
.
Closet 4 data
center
Ethernet
WAP around
p used
building
through cabling
Ethernet overpower
'
and
home
your
cut down
-
from
kinda opposite of POE
w/o
powoerutiet
:
wired /
SOHO Network
2. 3. wireless
Router / Switch
Functionality
addressing router
3 , up IP
layer
: switch
-
layer
,
2. MAC
Firewall
DMZ
Demilitarized
network
put
'
Port
facing
Forwarding
run services
•
to the
service
SoHo
in
in
NAT
trust
DMZ
dont
but
have
you
in
your
home
private IP addressing and translates
'
Static NAT ( 111 private lplpublic IP) Dynamic NAT (Pg
takes
'
-
NAT overload (l public many
,
QoS
Quality
wireless
,
private)
gets
settings
Encryption
Equivalent privacy
WEP wired
-
-
•
WPA
-
-
'
not secure
rotates
WPA 2 best
-
-
Aes
very
uses
same
protected Access
Wifi
-
,
changes keys
we
,
key
better than WEP
have
encryption compared
secure
over
Rc4
Public
optriypub)
to flow , prioritization
wireless
-
to
of service
Whose traffic
•
IP
public
device
want to run web server
Network Address Translation
if
'
Zone
inside
on
public
together
unprotected internet and
between
zone
addressing
routerswitchIAP
SOHO are
Most
Networking
Wireless
2. 4
protocols
802.11
(
a) 5GHz 23 non overlapping 20MHz Up to
b) 2.4GHz 3 non overlapping 11 Mbps
g) 2.4 GHz i3 non 54 Mbps
-
,
,
-
54 Mbps
,
,
,
gsas.tt#tnneuttnirieinomothoutmntIIFs::titantisream
Frequencies
2.4GHz, more
5. 0GHz
channels
,
congested
faster data
,
flatter go farther
2.4--11 Channels 3 dont overlap
,
5. 0=23 non
Bluetooth
2. 4
overlapping
GHz , 79 Channels used
RFID Radio Frequency
ID
electromagnetic fields to identify tags
Zigbee 4 z wave
mesh network everybody is connected
-
-
-
,
3G , 46,56 ,
-
LTE
LTE
=
I Gbps
but 56=10 Gb PS
2.5
Servings
server Roles
Network Hosts
:
web server
host website
i.
pages
layer hierarchy
-
not powerful
,
web server
>
web app server >
database
Seru
Apache Linux # I
•
File server
Computers with
•
lots
of
storage
Support multiple protocols
•
print server
help with
pressure
•
of
Smb , FTP SCP , WebDav
,
print jobs
prioritization
with
DHCP server
-
give
-
IP
add
info to
.
server admin defines
clients ( IP
scope (range
,
.
gateway
,
DNS , wins
)
reserve time
DNS server
contact list for internet
-
proxy
server
Works on
•
-
-
somethings behalf
Used to hide back comp
cache internet info
filter
'
out bad
web
.
from
public
locally
Mail Server
folders
'
-
.
mailboxes for each other
Acc name associated w/ domain
protocols have diff roles
or
,
lease time
Authentication
-
>
server
prove
'
you are
auth in local
.
who
or
you say
are
you
centralized area
Radius SSO Kerberos (authenticator)
-
,
,
Sys log
•
'
network devices 4 Server
systems
logs
into
aggregated
to be
have
one
log
files
location ( helps sewdrohing)
Internet Appliances :
UTM
•
Unified Threat
stop shop for
one
-
Management
security
firewall app control
,
protects
•
IDs
SOHO
Detection
Intrusion
•
device
server
or
,
reporting
,
IPS
anti
-
malware , VPN , Anti spam ,
-
ID slips
system
that
esigniture based anomaly
•
,
filters traffic
host ,
based heuristic based network
,
based
,
Alerts admin to take action
Intrusion prevention system
IDs but takes action
'
End Point
-
Management
centrally
Server
discover, provision , deploy update and
,
endpoint devices
track assets
trouble
Legacy I Embedded systems
-
-
Outdated
proprietary
,
runs
Hvac
or
sprinkler
and expensive to
replace , replace entire
section just for
embedded device
,
2. 6 Network Config
IP
Addressing
Where
routing
takes
•
Static IP
what
a
Hpi addresses
Dynamic
'
IPV 4
more
↳ 32
>
:
layer
3
common
,
user
place
manually puts
stays
same
Still
IPv6
a
thing
bit numbers in dotted decimal
,
A
E
-
classes ,
windows add
-
in , IP
change
can
private
A- PIPA Automatic private
-
.
.
range
Ip
10.0 O O
-
-
172.16
-
O O
-
-
-
10.255.255.255
172.31 255.255
.
92.168.00--192.168.255.255
Addressing
cant surf internet
He 80 : : )
Link Local IPV6 term
only valid for LAN , cant pass
DNS host records
IPV 4 VS IPV6
-
over
router
.
128 bit
32 bit
hexadecimal (A F. o 9)
all #
-
-
8 hextets
4 Octets
3.4×1038 add
4. 3 bit add
subnet mask
.
-
'
up network portion of IP
Used to determine network,broadcast 4 Usable
covering
range
for
Gateway
-
the
VPN
'
-
Use
Surf
way
to
get
an
in
IP
lout
back
security
address
of
to
your
work
network
1 home
.
Usually
network
a
firewall
VLAN
Used
'
local
virtual
all
over
logically
-
layer
-
break up
,
but
networks
layer
Switches
2
network
area
to
3 device
use
same
Pehglhsiipcmatnt
route
NAT Network address translation
-
private
to
public
Ip
Internet connection }
Network types
2. 7
cable
mapped
IP
Internet
popular coaxial cable very
DSL
Digital subscriber line
not as popular not that fast
Dial up internet
most
'
,
,
fast lbbps
'
,
.
Very
slow ,
good
for small data
packets
Fiber
-
growing
popular
,
satelite
>
very
"
,
converter
Very rural very expensive decent speeds
integrated services digital network
,
,
ISDN
fast Isp install
Slow ,
Line
of
•
not
popular
Sight
wireless
microwave
Comm
.
,
$ not bad
Network
types
:
LAN
-
network , small area
your private
WAN
LAN 's
connect
-
together
PAN
-
miles
,
long
small network blue tooth
,
MAN
'
LAN 4 WAN
together
,
blanket
w/ internet
city
WMN wireless mesh network
-
organized
radio nodes
in
topology goes
mesh
2. 8 Networking
crimper
.
cable stripper remove protective
.
.
Tone
generator
's probe
goes to which
cable tester After
.
see
if
Hoddle
Tools
attach ends to network
multimeter test line to
from
,
cables
covering
power
cable
on
flowing
to see which ends
the
of
cable
loop back
make a cable , see if it works
you
.
plug hardware
.
test for
punch down tool punch down
.
Wifi
analyzer
.
Want to
see
Nic
cable into
how
many
connection slots
Wifi networks
are
around
"
cables
3. l
Network cables :
802.3
Ethernet
'
Cat 5
-
,
Cat 5 e
Cat 6
-
300ft
twisted
,
4
,
,
,
,
Sheil de d
568 A/B
Fiber
-
fastest
•
,
I Gbps crosstalk 300ft
twisted , 4 , 10 Gbps 300ft
-
Plenum
'
twisted , 4 wires 100M bps
plastics that dont
-
off Chem
when
unshielded
standard for making cables
vs
-
not
,
give
copper but
light
waves
coaxial
•
Copper
wire
video cables :
VGA video graphics array
•
-
connector
15 pin
analog
video
display
HDMI h Mini HDMI
video da audio
-
.
replaces
Display
•
•
DVI
port
digital
digital
-
-
can
.
multimedia interface
support multiple monitors
audio 's Video
visual
Video only
DVI D
def
signals
analog VGA
port
One
high
,
signals
interface
digital
digital only
DVI
-
I
-
digital
4
analog
burn
Multipurpose cable :
lightning
cable
Apple phone
thunderbolt
•
•
•
connector
Connect thunderbolt devices to system
thunderbolt 142
,
same connector
thunderbolt 3 Uses
USB
Used for
•
USB
peripherals
1.0=12 Mbps
>
-
Peripheral
Hard Drive
SATA serial
•
USB
,
cables
,
Very
carries data audio , power
,
Gbps
fast
20 Gbps
Old
cables :
advanced tech attachment
replaced PATA (parallel ATA)
.
fast , 2 GBP5
IDE integrated drive electronics
PATA
133 MBPS multiple devices on one cable
SCSI small computer system interface
☐
•
•
,
•
device to device for external
HD
Adapters
•
Displayport
C
2.0=480 Mbps , 3.2=20
cables
Serial
•
,
,
-
C
Up to date
•
USB
mini
as
allows tech to convert to other
tech
3. 2 Common
con
C0nnectorwh
.
types
RJ-11
Telephone Older
•
2 pairs , 4 Wires
,
RJ-45
•
Connectors
on
end , 4 pairs , 8 wires , CATS, se ,
the
6
,
Ethernet
RS 232
-
•
Old connector for
serial
cables
BNC
mini quick connect / disconnect radio frequencies
RG 59 / RG 6
•
-
-
low power video
•
.tv ,
DB -9
•
tightener
Serial
cable , 9
pin EIA / TIA
,
232 Serial
intf
.
esata
•
external
SATA
,
hard drives
MO lex
•
how internal devices
get
their power
Cold )
3. 3 RAM Types
RAM
Types :
SODIMM Small outline dual
Used for laptops
in
-
line
memory
mod
.
•
Small notch & half
•
DDR 21314
double data rate
pins dont
•
circle
markings
match up
SODIMM Sizes
2--200 pin 3--204 pin 4=260 pin
DIMM sizes 2=240 3=240 4=288
4--3200
•
-
2--2100 MB /s
peak transfer rate
-
single
3=2600 MBA
MB "
/ Dual / Triple channel
how
many chips youre using
motherboard / CPU thing not RAM thing
Error correcting
•
•
,
•
Correct data corruption
has parity bit
parity vs non parity
•
-
Parity
-
'
Only
non
-
is an extra
bit
detect , not correct
parity
added to recognize
errors
faster
11213 Channel
Parity
SO DIMM
-
DDR slots
bit
Storage
3. 4
Optical
Drives
light
•
•
lasers
,
,
touching
no
-
•
Solid-state
no
,
,
Drives
moving
parts , quiet , fast
NVM e- nonvolatile
•
magnetics
or
faster more capacity CD , DVD Blue Ray
to double sided & double
layered -9
,
-
Devices
*
express
memory
like RAM
speeds push in
high
Magnetic Hard Drive
Hard disk drive moving parts cheaper
,
-
,
,
↳
Hybrid
2.5in & 3.5in
hold)
Drives
Speed of SSD
Flash Drives
•
,
capacity
of
HDD
memory very fast
flash
•
(
new
SD card compact flash , XD
-
,
↳ secure
↳
↳
digital
extreme
Raid
Raid 0
-
-
-
storage
,
in
different
,
,
not
as
popular
relevant
not
modes
0,1 5,10
,
striping
,
preform ance gain
exact data
no
fault tolerance
disk 142 fault tolerance
5Striping w/ parity , Min 3drives preformance { fault
Raid 10 mirroring w/ striping
Raid
Raid
•
,
digital digital photography
Operate drives
-
-
devices
memory portable
Compact flash mass portable
configurations
•
non volitive
-
.
1
mirroring
-
,
on
.
,
-
Motherboards
3.5
Add
Cpu's
Cards
On
,
,
Motherboard Form Factors :
ATX advanced
extended
technology
"
"
Standard motherboard 12 ✗ 9.6
MATX Micro ATX
9.6×9.6 less expansion slot , smaller
ITX { m / Tx information tech extended
•
•
,
.
smaller than MATX ,
•
cars
,
Pi 's
Motherboard Connector Types :
Pcl peripheral component interconnect
PCIe
•
smaller , # after
socket
•
you dont
have
types
Land Grid
Pin Grid
SATA
room
Array
Array
Ball Grid Array
-
how
✗ is
card
if
•
sound
/ Video
-
-
-
pins
pins
not
a
for
on
on
many
chip
socket, permanent
serial advanced tech att
.
•
,
plug
in
Internal
-
cards
Signal
on
front of
USB
case
connector
from motherboard to FP
(lbitp Cycle)
cards , plugs into board
socket
IDE integrated drive electronics
Slower Older tech ( PATA)
Front Panel Connector
•
lanes
expansion
Connect esata cables for drives
•
slot
PCI express
Riser
-
like
expansion slot
-
BIOS / UEFI
settings :
settings / Unified
basic input / Output
Boot options
When
•
first turn
you
on
boot
,
Extensible Firmware
•
-
Uefi
more
friendly
user
Firmware updates
update from render to update
update on ROM chips for Sec
•
begins
process
Starts POST test , then finds 0s and load to RAM
diff boot options allow you to boot into diff 05
•
•
interface
hardware
.
Security settings
password to protect from BIOS
-
Interface
Config
•
•
UEFI firmware
Battery
keeps power
-
resets
to
UEFI
settings
boot, boot
bit locker, secure
CMOS
•
configurations
config
need power
mb that
all
time
settings
CPU Features :
Single
-
-
Smaller
multi
'
core
-
systems
multiple
cores
process
dual core has
virtualization
•
microprocessor w/
single
core
chip
core
•
•
,
Virtual version
turn
on
in
2
CPU
of
simultaneously
,
could
run
2
processes
something guest
BIOS / Uefi sett
,
.
0s
at same
time
Hyper threading
"
•
trick
"
to think it
OS
has
more
in
MHz
cores
than
it
does
speeds
processor preform once
•
•
how
times
in
per second
many
cycles
Overclocking
inside BIOS
•
careful
•
settings
GPU
•
•
Shares
,
Cpu temp }
of
Integrated
integrated
internal
with
GHz
clock inside
ticks
CPU
tell computer to run faster
Voltage
into the motherboard
memory
or
CPU , more
as
part of chipset
economical alt
to ded
.
.
GPU
computability
•
AND advanced micro devices cheaper easier to
Intel power graphics processing speed & power better
-
,
-
ov clock
-
,
,
cooling
Mechanism
Fans Heatsink
,
•
Cpu
,
get
:
thermal paste
hot ,
thermal paste
then
heatsink then fan
Liquid
Tubing
•
with
cooling
liquid
runs
across
CPU
,
no
fans
Expansion cards :
video
•
card
display
sound
•
to
on
,
HDMI VGA DVI 5- video
RCA
card
get sound
duh
-
screen
Software
firmware
,
analog digital
on
CPU
fiber optics
NIC
-
need
ports
more
USB expansion card
give you more USB
•
slots
ESATA card
-
external
SATA
connection
for drive
3.6 Peripheral Types
Monitor
works in conjunction
Optical Drive Types
read 4 create disks
•
w/
graphics
card
•
External Storage
•
backups
,
Drive
media
storage
KVM
•
Keyboard
using
the
,
Video
same
,
mouse
.
peripherals
Monitor
,
use
,
config
diff
systems
Power
3. 7
Input
115 V
need to
•
115
'
VS
is
V
Output
•
5v
need
22 OV
.
whats
know
usually
us
Supply
in
US
,
if
coming
220
might fry
it
IZV
.
from your
your
wall
circuits
but not 115hr
power
(→AC for monitor)
24 Pin motherboard adapter
ATX 24 pin power supply is standard
•
AC
→
Dc
-
'
may
wattage
need adapter
20 pin
←→
24 pin
)
Rate
advertised
•
(like
* more devices
,
on
more
wattage
.
9#
,
9 power
power (expansion
.
May
cards fans ,
,
need more
higher
3. 8 Custom Pc config
Graphic /CAD / CAM Design
SSD
High
workstation :
fast storage 1-2 TB
end video great video cards
-
,
-
-
Maximum RAM
Audio / video
specialized
large
,
-
32 -64 GB
Editing
workstation :
audio 4 Video card audio channels
fast HD
-
-
SSD
or
cloud based
Dual monitors split content
-
more
Ram
GPU
.
,
CPU )
or
less
Virtualization Workstation :
Plenty of RAM HD CPU cores Able to
-
,
,
run
almost
2
Computers
Gaming
PC
:
load games quickly { efficiently
dedicated GPU the most you can afford
HD sound card good sound quality
SSD
-
-
-
good cooling
lots of fans
-
or
liquid Cooling
Network Attached Storage ( NAS )
provide extra storage
tons of Drive space HDD , RAID
:
-
NIC Card
Thick
•
•
-
lots
client
everything
at
least
Thin client
•
•
-
of
input & output
:
this
ran on
recco mended
system CPD
components
:
Central , server based comp
Output just delivered to thin client
bare components fast network
processing
done at
,
.
3.9
Common Devices
Desktop :
thin client
processing running
•
on
backend
over
network
thick client
most
•
computers
personal
Laptop / common
Touchscreen
mobile
config
synchronization
-
sett
.
processed locally
devices
control
-
,
panel
>
:
Tablet Pc
Cloud based app
settings
3. 10 SOHO Devices
use
•
appropriate drivers for given 05
half / full duplex listen OI talk V5 listen and
,
•
Collate
-
the
printed order
Device sharing
printers wired / wireless
integrated print server
•
"
•
Cloud
printing
.
talk
Print
3. 11
Laser Printer
Technologies
:
imaging drum transfers image w/
f- user
assembly heated rollers that
toner onto paper
-
transfer belt
transfer
in front of toner carts
-
roller
toner to paper
fuses the
-
-
through
transfers the paper
Sepe ration pad separates the top paper
duplex assembly print on front 4 back
process Clean neg charge to drum drum struck by
-
-
laser ,
-
,
,
transfer w/ Pos
maintenance
chrg fusing
,
on
img
heat { pressure to toner
,
replace toner , clean
-
toner
w/ gloves 4 brushes
Inkjet printer ;
ink
cartridge
print head
roller
-
feeder
-
holds ink , Print head talks
-
nozzle to
spray
pulls paper from
-
feeds paper
belt
-
on both
attatch to cart
-
to
Clean heads
Thermal Printer
sides
held
where ink carts are
maintenance
heated
in
duplexing assembly print
-
,
printer
tray
-
carriage
ink
to
more
9-tipwwater replace cart clear jam
,
,
:
thermo chromic paper special
feed assembly grabs paper
heat sensitive
-
paper
coated w/ Chem
-
heating
image w/ heat
replace paper change heating
element makes
maintenance
-
-
,
elements , remove
debris
✓
Impact Printer
print head part
ribbon
-
•a•er•)n
:
org
makes contact
-
ribbon
-
w/ paper
ink ribbon between head { paper
tractor feed
-
wheels
impact printer
maintenance
-
-
stays
edges
paper
holes
on
on
replace ribbon print
:
,
head paper
,
virtual Printer :
digital copy
-
file , Pdf
,
Xps
,
img
3D Printer :
Melt plastic
Quiz ?s
:
to
make
single
=
power
restart
Sep pad
.
image
mode fiber
mole ✗
shift +
3D
=
=
to
=
faster { farther
older internal devices
UEFI menu
only top
paper to be fed
Hammer
4. 1
Virtualization
Common Cloud
models
:
IAAS
infrastructure
-
-
SAAS
•
you
Software
Of
PAAS
•
of
care
take
as
a
as
service
a
05
but
.
as
but
use
you
you buy
new
a
service
a
to test
,
to
PC
not hardware
service , you dont have to take
anything paying you
Platform
,
care
cloud services
use
dont take
care
of
hardware
application
end
user
app develop
.
net arch
Cloud
Models :
Public cloud
10W IT overhead
•
potential
Private cloud
•
fully
•
great
latency
custom
IT
highcloud
Hybrid
.
,
high
Scalability
Sec
,
,
good
,
lack of customization ,
preform once , Capitol
overhead
flexability , no Capac
,
manage Sec
,
.
hard compatibility
,
cost
,
Shared Resources :
WI Cloud Computing
use
•
shared
.
internal
us
backend the clients
On
•
.
physical
resources
external
.
Rapid Elasticity
•
you need
if
( more RAM
On-Demand
-
"
,
mem
demand
"
.
space
Cpu ) You put
more
,
more
Resource pooling
Centralized
Measured services
mem ,
•
provider needs
Metered
to
•
allow
-
Off site
customers
Off site
•
-
easier
•
,
request
something
CPU etc divided
,
how
know
to
they 11 Charge
Computing
sync access through
to
,
bits
break
doesnt
•
cloud
•
•
•
take
web
thin
servers
hard
until
chunks
tried
and
to
use
download
space
applications
browser
client
on
server
Pc
on
into
package
based
open
like
arent
web , not app
dropbox)
Cloud based , on
virtual Application streaming
cloud
•
•
service
Cloud
•
the
for
virtualization
customize
Cloud file storage service
Saas
apps (g / one drive
, Sync
•
up
applications
email
-
in
of
less
or
w/ Cloud Computing
,
app
to
from
backend
access
cloud
store
process
an
data
it
specific
virtual Desktop
doesnt run
•
kinda like
virtual NIC
•
directly
remote desktop
Virtual Switch
into
Shoving
,
Client
Side
4. 2
endpoint hardware
on
.
nice
through
Virtualization
Purpose
Of Virtual Machine
testing malware analysis , lab
•
,
OS Older software
new
.
Resource
,
icons Of
software develop
-
guest
0s
really
its
virtualization
App
•
an
-
uses
•
who
-
-
where does
can
use
what
who
Server
type
or
Hv
Hypervisor
•
•
•
hosting
Type
Type
1
2
client ?
type 2 HV
has
.
directly
physical
traffic go
access ?
?
apps
can
I
,
host requirements
as
youre running hardware
hardware
guest 0s see each
Network Requirements
-
resources
emulator software
Requirements
network
•
thinking
into
physical security
'
as well
OS
tricking
security
.
Requirements
when
•
.
.
requirements
Emulator Requirements
•
enviro
how
other?
many guest
multiple machines
? what
0s
are
running ?
? Consolidate
hypervisor ( bare bones hardware
hypervisor ( OS in between hw host
,
,
-
,
services
resources
HV
Os
-
guest Os)
Hr guest Os)
,
-
rn
5. 1
* 1.
meth ology w/ problems
identify
theory
2. establish
3. test
theory
Verify
to
of probable cause
determine cause
plan of action to resolve prob & impliment
4. establish
5.
*
the problem
system functionality &
full
preventive
solution
measures
6. document finds , actions , outcomes
1.
Identify
•
•
the
question
•
3.
question
Test
•
user
environmental
2. Establish
a
problem
identify
,
the
changes
infrastructure
or
theory
user
of probable
obvious ,
changes
,
review
logs
cause
conduct external
or
internal research
theory to determine cause
Once theory is confirmed determine next steps
if theory doesnt work re do what you did to get
the
,
•
-
,
4. establish plan
•
5.
When , Who
Verify
•
full
test and
6. document
•
SO
you
is
of
action
affected ,
system
how
implementing
functionality
review
findings
know
what to do next time
in
og
state
5. 2 troubleshoot
motherboard ,
c.PU , RAM ,Power
Unexpected Shutdowns
power supply
-
system
,
lockup
overheating(8%8) Malware
CPU temp hardware devices , malware
•
,
,
,
hardware driver
( safe mode )
updated
drivers
POST
Code beeps
lookup manufacture codes
Black screen on boot up
•
Video
•
•
GPU
NO
no
power / bad
,
setting
resets
bad /
boot
to
missing
to incorrect drive
/ Unplugged HD , partition isnt set , incorrect
boot
Reboots
continuously
-
monitor
CMOS dead / dying
Attempt
•
,
bad power bad
1310s time {
•
Unplugged
cable
bad / incorrect driver
,
malware
order
bad RAM , hardware
,
issue
power
•
Check
cables
/ Source
,
power supply
Overheating
going bad
dust , Over clock , fans thermal paste
Loud Noise
•
,
•
hardware
issue
Intermittent device
•
driver
Only
•
fans
cables ,
Indicator
'
lights
,
Power supply HD
failure
issue , became
getting
heating
lights
on
click ,
,
power
issues
,
loose
or
hitting
fans
unseated , power , heating
firmware
RAM issues
,
GPU , bad capacitor
motherboard that prompts
you
whats
wrong
Smoke
burning smell
or
fried power
capacitor
•
build up
dirt
Proprietary
crash
screen of
blue
•
When
capacitors
and
entries
windows
•
screen
.
capacitor
log
top open , cheap
error
event
viewer
slow preform once
malware , old drives
loud
-
clicking
,
linux
•
to
log
,
/ fragmented logic
,
err
,
-
damaged
drive
cable ,
bad HD drive
,
crash
0s not installed , MBR
.
T
damaged
drive
screen
,
Self
.
,
blue screen death MAC
.
Console app
boot drive not recognized
cable , power, boot files drive
,
,
•
power ,
cant write , power , data
BIOS incorrect , Controller fail power , faulty
5. M A. R
=
noise
data
proprietary
•
Mac
power , malware
corrupt , partition not active ,
RAID not found
•
'
found
05 not
•
files
HD { RAID
settings
BIOS
app frozen
old
or
Hvar / 10g directory)
gone bad
when read / write head
failure
,
failures
cable , drive
loose
•
thing
messages
5. 3 troubleshoot
Read / write
short circuits , elec surge
,
death , driver Software
Distended
•
supply
,
pinwheel
errors
monitoring analysis &
,
report
tech
.
,
warns
you
of
error
,
error codes
Video Projector ,
5. 4 Troubleshoot
VGA
mode
640 V5 480
•
.
NO
image
cable
-
display
,
bad drivers , defualt
on
to this mode for
troubleshoot
screen
issue , power
issue
overheat shutdown
fans Over clock dirt
dead pixels
,
dedicated
vs
.
integrated
•
,
,
pressure
'
on
screen
,
dust cracked
,
,
malfunction
Artifact
•
drawing
Incorrect
-
•
color
w/
Check
Dim
settings
power
video card , soft / hardware driver
overheating
,
,
cables
,
and
power
image
might be set
image /geometry
Burn
-
cable , EMF
,
GPU
=
tense ,
low , VC driver , monitor / cable
damage
refresh rate
,
Sotware bad
,
monitor
in
ghost image non moving
oversized images
-
-
,
•
monitors
dirty projector
refresh rate
destorted
-
,
by
pattern
diff
image
flickering
-
errors
resolution software
,
image
issue
on
screen
/ settings
,
display
drivers
mobile
5. 5 troubleshoot
display / dim
no
power ,
-
graphics
flickering
"
"
sticking
,
screen
,
/ distorted
keys
in
damaged
display
rate , drivers
refresh
debris
-
display
device
keyboard
intermitten wireless
wireless card bad
•
location Cable
loose
.
,
battery not charging
battery gone bad Charger
drift
curse
,
ghost
rl pointer
malware , calibration
'
no
strong
not
•
issue
,
,
bad hardware
power
power supply / adapter/ cable malware
-
,
,
battery
indicator
lights
driver auto come on during Boot
no wireless connectivity / bluetooth
lock
MUM
bad
•
,
airplane
•
cant display
switch
,
wrong settings
to ext monitor Éard damage
card BIOS , bent pins , cable , Fntf# , software
,
.
graphic
•
mode , hard / Software
,
screen
,
touchscreen not responsive
Calibrate
-
apps
not
•
slow
•
not
turned off ,
loading
downloading
digitizer
from Cloud
,
,
driver , humid conditions
no
perm
.
,
malware
preform once
malware
/bloat ware too many processes old , physical
,
,
decrypt
Unable to
•
,
Software Key
,
,
no
dam
.
email
connection,
device doesnt support
encryption
battery
Overcharged going
frozen system
Short
-
,
bad , apps in back
driver power app 0s update HD,
NO sound from speakers
-
,
,
,
,
RAM
muted / turn down driver software,
'
cable
,
,
5.6 troubleshoot printer
streaks
dirty roller
ghost image
-
,
,
head
humid , drivers
-
creased
•
paper
rollers phys
,
paper jam
.
damage
roller/ feeder,
'
garbled
•
,
characters
bad drivers , print
vertical
-
bad paper humid
lines
roller , head
backed
head
,
Fuser , drum
up que
Stalled job, memory network
cant install printer
permissions disk space
•
,
-
,
multiple fail jobs
•
permissions
,
over
in
logs
quota ,
no
paper
Wired { Network prob
5.7 Wireless
limited
•
connectivity
bad
no
/ connectors
cables
,
out of
wireless
range
connectivity
Perm hardware , driver, wrong pass cable power
A- PIPA / link local
•
,
,
intermittent
bad
•
to DHCP
talking
not
-
,
server
connectivity
cables , connectors out of range
,
IP conflict
manually
•
put
in
IP but also
in
DHCP scope rogue Dtkr
.
,
Slow transfer speed
•
hub installed
-
Makes
half duplex ,
it
10W RF speeds
•
too
SSID
•
exam
LCD
lighting
_-
used
dig
far from Ap
wrong too
it
final
GPS
,
?s
wrong
,
Dc
→
Ac
-
:
inverter
--
global positioning system
around
cities MAN
not
transfer
-
-
Voice , Video data
,
--
ISDN
eufi
img- drum
,
heated
rollers
=
broadcasting
or
stations port replicator
transmission
UEFI
,
found
typing
docking
wireless inf
.
,
AP interference
far from
not
cabling
fuser
down , not
SSID