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network + > OSI > Flashcards

OSI Flashcards

1
Q

what is the

OSI means

A

Open Systems Interconnection

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2
Q

what are the

layers of the OSI model

A
  1. Application
  2. Presentation
  3. Session
  4. Transport
  5. Network
  6. Data link
  7. Physical
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3
Q

what is

OSI layer 1

A

physical layer

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4
Q

what is the

data link layer payload

A

network layer packet

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5
Q

what makes up the

OSI layer 2 frame

A

Destination address + Source address + Payload + Error Check

(Network layer packet)

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6
Q

describe

OSI layer 2 error checking

A

only capable of very basic error checking, such as error checking or corrupt frames

no way to acknowledge or retransmit damaged frames

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7
Q

what is the

the MAC sublayer covers

A
  1. logical topology- bus or ring
  2. media access method- contention or token based
  3. addressing- format for hardware addresses
  4. frame format
  5. error checking mechanism
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8
Q

what is the

OSI layer 3

A

network layer

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9
Q

what is the

purpose of OSI network layer

A

moving data around a network of networks

(internetwork or the Internet)

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10
Q

what is the

routing occurs at OSI ______ layer

A

layer 3

network layer

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11
Q

what is the

OSI layer 4

A

transport layer

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12
Q

what is the

what is OSI transport layer also known as

A

end-to-end

or

host-to-host

layer

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13
Q

what is the

function of the OSI transport layer

A

identify each type of network application by assigning it a port number

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14
Q

what is the

network layer pdu

A

packets

or

datagrams

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15
Q

what is the

OSI layer 4 PDU

A

segment

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16
Q

what is the

OSI reliable data delivery layer

A

OSI layer 4, transport layer

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17
Q

what is the

OSI layer 5

A

session layer

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18
Q

what is the

function of OSI session layer

A

dialog control functions

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19
Q

what are the

dialog control functions

A
  • establishing dialog
  • managing data transfer
  • ending (tearing down) the session
20
Q

what are the different

session modes

A
  • one-way / simplex
  • two-way alternate (TWA) / half-duplex

taking turns [cb radio]

  • two-way simultaneous (TWS) / duplex

[phone call]

21
Q

what is the

OSI layer 6

A

presentation layer

22
Q

what is the function of the

OSI presentation layer

A

transforms data between the format required for the network & the format required for the application

23
Q

which is the

OSI layer supporting data compression & encryption

A

layer 6

presentation layer

24
Q

what is the

OSI layer 7

A

application layer

25
Q

what is the function of the

OSI application layer

A

provides an interface for programs on hosts with communication channel to exhcange data

26
Q

What model is this

  1. Application
  2. Presentation
  3. Session
  4. Transport
  5. Network
  6. Data link
  7. Physical
A

layers of the OSI model

27
Q

Which layer is the

physical layer

A

OSI layer 1

28
Q

What is

Destination address + Source address + Payload + Error Check

(Network layer packet)

A

OSI layer 2 frame

29
Q

What is

only capable of very basic error checking, such as error checking or corrupt frames

no way to acknowledge or retransmit damaged frames

A

OSI layer 2 error checking

30
Q

What covers

  1. logical topology- bus or ring
  2. media access method- contention or token based
  3. addressing- format for hardware addresses
  4. frame format
  5. error checking mechanism
A

MAC sublayer

31
Q

Which OSI layer is the

network layer

A

OSI layer 3

32
Q

What is responsible for

moving data around a network of networks

(internetwork or the Internet)

A

OSI network layer

33
Q

What

transport layer

A

OSI layer 4

34
Q

Which OSI layer is the

end-to-end

or

host-to-host

layer

A

OSI transport layer

layer 4

35
Q

What is responsible to

identify each type of network application by assigning it a port number

A

the OSI transport layer

layer 4

36
Q

What are

packets

or

datagrams

A

network layer pdu

37
Q

Which OSI layer uses a

segment

A

OSI layer 4 PDU

38
Q

What

session layer

A

OSI layer 5

39
Q

What layer provides

dialog control functions

A

function of OSI session layer

layer 5

40
Q

What provides

  • establishing dialog
  • managing data transfer
  • ending (tearing down) the session
A

dialog control functions

41
Q

What are these

  • one-way / simplex
  • two-way alternate (TWA) / half-duplex

taking turns [cb radio]

  • two-way simultaneous (TWS) / duplex

[phone call]

A

session modes

42
Q

What

presentation layer

A

OSI layer 6

43
Q

What OSI layer

transforms data between the format required for the network & the format required for the application

A

OSI presentation layer

layer 6

44
Q

What

application layer

A

OSI layer 7

45
Q

What OSI layer

provides an interface for programs on hosts with communication channel to exhcange data

A

OSI application layer

layer 7

46
Q

what is a

logical segment

network + (10 decks)

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