Brainscape's Knowledge GenomeTM

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


See full index

Information Systems > EXAM EASY > Flashcards

EXAM EASY Flashcards

1
Q

Describe OSI Layer 1

A

Number: 1
Data format: Bits
Layer: Physical

Media, Signal and Binary Transmissions

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

Describe OSI Layer 2

A

Layer: 2
Data: Frames
Layer: Data Link

MAC and LLC
(Physical Addressing)

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

Describe OSI Layer 3

A

Layer: 3
Data: Packets
Layer: Network

Path Determination and IP (Logical Addressing)

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

Describe OSI Layer 4

A

Layer: 4
Data: Segments
Layer: Transport

End-to-End Connections and Reliability

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

Describe OSI Layer 5

A

Layer: 5
Data: Data
Layer: Session

Interhost communication

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

Describe OSI Layer 6

A

Layer: 6
Data: Data
Layer: Presentation

Data Representation and Encryption

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

Describe OSI Layer 7

A

Layer: 7
Data: Data
Layer: Application

Network process to application

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

Describe bandwidth

A

The amount of data that can be transmitter over a network cable at one time, usually expressed in M/G/TBps.

1,000,000 MBps = 1,000 GBps = 1 TBps

More frequencies carried = more data transmitted = higher bandwidth

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

Describe Baseband

A

DIGITAL SIGNALLING

Signalling method that uses High and Low voltages on a cable to indicate Binary 1’s and 0’s

Time Division Multiplexing allows multiple data streams

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

Describe Broadband

A

ANALOGUE SIGNALLING

Modulates data into frequencies before sending across medium

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

Describe Attenuation

A

Gradual weakening of signal as it passed through wire/medium.
The greater the distance or frequency, the more attenuation occurs

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

Describe Repeaters

A

Reduce noise of cable, increase signal strength allowing further communication, but add delay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Describe Bridges

A

Connect two or more network segments - monitors MAC addresses, filters out unneeded packets, thus reducing traffic

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

Describe Routers

A

Like Bridges
Connect 2 or more networks and send packets to correct destinations.
Work on Network Layer (3) using IP address not MAC

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

Describe Gateways

A

Connect network segments via translation, operate at layers 4-7, often virtual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Describe Star physical topology

A

Search node connected with it’s own cable, typically UTP, to a central hub, which internally connects them all

17
Q

Describe Bus physical topology

A

A single cable (backbone) supports entire network segment, nodes attached at various points

18
Q

Describe Ring physical topology

A

Nodes connected in a circle, nodes pass messages from upstream to downstream, acting as a repeater.

19
Q

Compare and Contrast UTP/STP, Coax and Fibre

A

UTP: Low cost, low bandwidth, vulnerable to snooping and EMI, 100m range
STP: Med cost, low bandwidth, resistant to snooping and EMI, 100m range
Coax: High cost, med bandwidth, resistant to snooping and EMI, 200-500m range
Fibre: High cost, high bandwidth, invulnerable to snooping and EMI, 1000+km range

20
Q

Advantages/Disadvantages of UTP/STP/Coax/Fibre

A

UTP Adv: cheap
UTP Dis: vulnerable to interference
STP Adv: Shielded from interference/cross talk
STP Dis: expensive, heavier, special connectors req
Coax Adv: very resistant to EMI
Coax Dis: rare today
Fibre Adv: invulnerable to EMI/crosstalk, best bandwidth
Fibre Dis: expensive, difficult to install, fragile, special connectors

21
Q

Describe Circuit Switching

A

Continuous physical link until ended, clear but inefficient

22
Q

Describe message switching

A

Duplicates of signed message sent via different route - slow but reliable

23
Q

Describe packet switching

A

Message broken into small packets and sent via different routes over network, fast and efficient

24
Q

Describe and draw VLANS

A

Virtual Local Area Networks - virtually separate networks on same cables = reduced traffic, increased security

25
Q

Class A IP

A

First 8 bits ID network
Last 16 bits ID machine
126.255.255.255

26
Q

Class B IP

A

First 16 bits ID Network
Last 16 bits ID Machine
191.255.255.255

27
Q

Class C IP

A

First 24 bits ID Network
Last 8 bits ID Machine
233.255.255.255

28
Q

Example of a private IP address

A

192.168.10.0

29
Q

What parameters does the firewall check?

A

Packet source
Destination address
Protocol
Port Number

Information Systems (2 decks)

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