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Networking > Networking > Flashcards

Networking Flashcards

1
Q

Physical components layer 1

A

Physical layer, wires, computers, switches

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2
Q

What is encoding and what layer is it on?

A

Encoding is a pattern of voltage or currant used to represent bits; the 1 and 0.

Layer 1 physical layer

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3
Q

What is the signal method? What layer is it on?

A

The method of representing the bits. IE The physical layer standards of what represents a 1 or 0

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4
Q

What is bandwidth?

A

Bandwidth is the capacity of a medium to carry data. The amount of data can flow from one place to another in a amount of time BPS

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5
Q

What is throughput and what factors influence it?

A

The measure of the transfer of bits across the media over a given period of time. The amount of traffic, the type of traffic, the latency.

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6
Q

What is the difference between a strait through cable vs a cross over cable?

A

Strait through cables connect two unlike devices where crossover cables connect two like devices.

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7
Q

What does the data link layer do?

A

The data link layer prepares network data for the physical network.

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8
Q

What is point to point topology? Hub topology? And full mesh topology?

A

Point to point is a permanent link between two endpoints. Hub a Centre point that connects to all endpoints. Mesh every end point connects to every other end point.

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9
Q

What is the difference between half and full duplex?

A

Half duplex can send and receive but not at the same time. Full duplex can send and receive at the same time.

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10
Q

What is a MAC address?

A

A burnt in address on each device made of 48 but hex-decimal format.

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11
Q

What is a IP address?

A

Your computers address. Can and is changed frequently. 32 bits in dotted decimal.

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12
Q

What is a switch? What does it do?

A

A layer 2 device for connecting end users. Operates in a single network.
Uses MAC address.

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13
Q

What is a router and what does it do?

A

A layer three device. Finds where a target is located and sends info to that destination. Connects networks.
Uses IP addresses.

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14
Q

What is LAN?

A

Local area network.
For short distances.
Exclusively Ethernet.
Switches

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15
Q

What is wan?

A

Wide area network.

Uses routers.

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16
Q

What is IANA?

A

Internet assigned numbers authority.

Your IP address.

17
Q

What is the IEEE?

A

Institute of electrical and electronic engineers.

Your MAC address.

18
Q

What is ANSI?

A

Something to do with Telecom.

19
Q

What are the 7 layers of the OSI model?

A

Open system interconnection:

7: application (data)
6: presentation (data)
5: session (data)
4: transport (segment)
3: network (packet) (IP)
2: data link (frame) (Mac)
1: physical (bit)

20
Q

What is the point of the layer model?

A

Reduce complexity

Isolate problems

21
Q

What is bit encoding?

A

Converting bits to voltage levels.

22
Q

What is attenuation?

A

How much the signal strength diminishes over distance.

23
Q

What is the meaning of bandwidth and the network meaning of bandwidth?

A

The difference between high and low frequency.

Rate of bits sent.

24
Q

Who loves you?

A

Brooke does! ; 3

25
Q

What is a strait through cable?

A

Connect unlike devices.

26
Q

What is a crossover cable?

A

Connect like devices.

27
Q

What does forwarding frames do?

A

Organizes information.

Uses MAC address

28
Q

What is connection based access?

A

All pc’s compete for media.

Each pc connected to a bus

29
Q

What is control based access?

A

Only 1 pc can transmit at a time.

Avoids all collision.

30
Q

What is CSMA/CA?

A

All hosts connected to a shared medium.
All users listen for collision.
If collision happens every one pulls out
Random timer.

31
Q

What is CSMA/CA?

A 
(Currently used)
All hosts connect to a shared medium.
Host listens until medium is free.
Send a signal to claim medium for a amount of time. 
Sender starts sending frames.

Networking (4 decks)

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