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Networking > Network layout > Flashcards

Network layout Flashcards

1
Q

What is a Client?

And draw icon

A

defines a device an end users uses to access a network.

A computer

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2
Q

What is a Bridge?

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A

Connects two networks segments together and is a selective repeater it examines the mac address of the traffic.

a box with a U on top

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3
Q

What is a Sever?

A

It serves up resources to a network.

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4
Q

What is a Hub?

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A

that interconnect network components such as clients and servers. It is a layer 1 device.
Is a square with 1 arrow

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5
Q

What is a Switch?

And draw icon

A

Is a controller enabling networked devices to talk to each other efficiently. This is done by MAC address. Which is a layer 2 device. [is a square with to arrows]

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6
Q

What is a Router?

And draw icon

A

is a layer 3 device that forwards decision based on logical network addresses. [ a circle with arrow towards and away from each other

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7
Q

What is a LAN?

A

Local Area Network. Interconnects network components within a local area.

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8
Q

What is a WAN?

A

Wide Area Network. Interconnects networks components that are geographically separated.

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9
Q

What is a CAN?

A

Campus Area Network. Are when multiple LAN on a campus or business park

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10
Q

What is a MAN?

A

Metropolitan Area Network. Interconnected locations scattered throughout a metropolitan area.

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11
Q

What is a PAN?

A

Personal Area Network. whose scale is even smaller than a LAN. usually connected between a PC.

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12
Q

What is Logical topology?

A

The actual flow of network track?

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13
Q

What is Physical topology?

A

The physically interconnected components of a network.

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14
Q

What is Point to Point?

A

The simplest it only connects 2 end points.

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15
Q

What is a Bus topology?

A

Each machine is connected to a single cable. A signal is sent to all connect devices until it fined the correct MAC address.

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16
Q

What is a Star topology?

A

Each network host is connected to a central hub with a point to point connections. The hub acts as a single booster or repeater. Information can not be shared with a single computer in the topology.

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17
Q

What is a Ring topology?

A

that is set up in a circular fashion which data travels around the ring in one direction and each device on the ring acts as a repeater to keep the signal strong.

18
Q

How many layers are in the OSI model.

A

7

19
Q

What are the layers of the OSI model

A 
physical 
data link
network
transport
session
presentation 
Application
20
Q

What is the Layer 1 and its meaning?

What is its PDU?

A

Physical
Is responsible for the transmission and reception of instructed raw data between devices.
This is the physical devices. Such as Ethernet, Bluetooth, USB, Hub

PDU is Bits.

21
Q

What is PDU

A

protocol data unit. the unit for a layer in the OSI model

Some People Fear Birthdays.
Segments
Packets
Frame
Bits
22
Q

What are the 2 types of Synchronizing bits?

A

Asynchronous - Only one sender at a time normally based on a own internal clock.
Synchronous - Synchronizes the internal clock of both the sender and the receiver that they agree on when bits begin and end.

23
Q

What are the 2 types of Bandwidth usage?

A

Broadband - divide the bandwidth available on a medium into different channels.
Baseband - uses all the available frequencies on a medium to transmit data. Ex. Ethernet.

24
Q

What is multiplexing.

A

allows multiple communications sessions to share the same physical medium.

25
Q

Name the 3 multiplexing strategies and there meanings

A

Time-division multiplexing - supports different communication sessions on the same physical medium by causing the sessions to take turns. This is also know as a time slot.

Statistical time division multiplexing - dynamically assigns time slots to communications sessions on a as -needed basis.

Frequency division multiplexing - divides a medium frequency range into channels, and different communications sessions transit their data over different channels.(broadband)

26
Q

What is the layer 2 and its meaning?

What it’s PDU?

A

is concerned with packaging data into grams and transmitting those frames on the network. Performing Error detection/correction, uniquely identifying network devices with and address. and handling flow control.

Has two sub layers MAC and LLC.

PDU - Frames.

Devices NIC,SIWTCH,BRIDGE,WAP

27
Q

What is MAC?

A

Media Access Control. is a 48 bit address assigned to a device.
The first 24 are for the vendor.

28
Q

What is LLC?

A

Logical Link Controller. is responsible for identifying and encapsulating network layer protocols and controls error checking and frame synchronization.

29
Q

What are the 2 types of Connection services?

A

Flow control - limits the amount of data a sender can send at one time.

Error control - Allows the recipient of data to let the sender know if an error occurs.

30
Q

What are the 3 types of Synchronizing transmissions?

A
  1. Isochronous - network devices look to a common device in the network as a clock source, which creates fixed-length time slots.
  2. Asynchronous - a network device reference there own internal clock and network devices do not need to synchronize their clocks.

3 Synchronous 2 devices syncing using and external clock or channels to send communication.

31
Q

What is layer 3 and its meaning?

What is its PDU?

A

Network Layer.

Responsible for forward data based on logical addresses. These are where routers live. this layer is responsible for routing data.

Common protocol IP/IPx/ICMP

PDU is Packets.

32
Q

What is layer 4 and its meaning?

What is its PDU?

A

Transport Layer

Data are encapsulated into segments for t transmission to the lower layers of the OSI model.

Common protocols are TCP/UDP

PDU is segments

33
Q

What is windowing?

A

is when one or more segments are sent at one time and a receiver can acknowledge the receipt fall the segments in a window.

34
Q

What is buffering?

A

A devices allocates a chunk of memory to store segments if band-width is not currently available to transmit those segments.

35
Q

What is Layer 5 and its meaning?

A

Session Layer

This layer is responsible for building, maintaining. destroying connections.

Normally logical ports.

common protocol RPC/Netbios

36
Q

What is Layer 6 and its meaning?

A

This is the presentation Layer

Responsible for formatting and securing the data with encryption.

37
Q

What is Layer 7 and its meaning?

A

Application Layer

provides application services to the network. and service advertisement for available services on a network.

38
Q

What is the TCP/IP Stack?

A

Application
transport
Internet
Network Interface

39
Q

What does network interface map to in OSI model

A

layer 1 and 2

40
Q

What does internet map to in OSI model?

A

Layer 3

41
Q

What does Transport map to in OSI model ?

A

Layer 4

42
Q

What does Application map to in the OSI model?

A

Layer 5,6,7

Networking (19 decks)

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