Help study for the NOCTI Final. .
Exposed metal parts
The mouse
The NIC
The monitor
120 VAC
9V
0V
12 VDC
Low resistance
High resistance
No resistance
Water
Glass
Rubber
Plastic
Copper
Prevent equipment from becoming energized with hazardous voltage
Provide a current path so that minor surges in power can be diverted
Avoid magnetizing the equipment
Safely bleed off excess voltage
Capacitor
Resistor
Power strip
Surge suppressor
Hard drive
Video card
NIC
Modem
Modem
Hub
Router
Switch
Analog signals are measured in bits per second, while digital signals are measured in bytes per second
The length of an analog signal is dependent on the amplitude of the signal
Analog signals are continuous waves whereas digital signals are discrete events in time
Digital signals are measured in decibels, but analog signals are measured in amplitude
2
4
6
8
Fiber optic
UTP
Infrared
RJ-45
AUI
BNC
RJ-45
RJ-11
Crimping tool
Multimeter
Oscilloscope
Punch down tool
Fiber optic
Coaxil
UTP
Work stations to the bus
Wall ports to the wiring closet
Routers to the switches
POP to the MDF
MDF to the IDF
IDF to the POP
POP to the MDF
MDF to the IDF
IDF to the wiring closet
BNC
RJ-45
MAU
Token ring
Wireless networks
FDDI
Physical
Data-link
Network
Transport
Session
Presentation
Application
It handles error notification, network topology, and flow control
It provides data representation and code formatting
It provides network services to user applications
Transport
Session
Application
Packets, frames, bits, data, segments
Data, segments, packets, frames, bits
Bits, packets, data, segments, frames
Encryption
Encoding
Encapsulation
Transmitted along the medium
Segmented into frames
Converted to binary format
True
False
Network
Data-link
Physical
4
6
9
8
Router
Hub
Repeater
Connector
Bridge
Switch
Workstation
Hub
OSI layer 2 and use IP addresses to make decisions
OSI layer 2 and uses MAC addresses to make decisions
OSI layer 3 and uses MAC addresses to make decisions
Intermediate distribution facility
Internal distribution facility
Interim distribution facility
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