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ISDN1 > Ch. 1 The TCP/IP and OSI Networking Models > Flashcards

Ch. 1 The TCP/IP and OSI Networking Models Flashcards

0
Q

IP

A

Internet protocol

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1
Q

TCP

A

Transmission Control Protocol

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2
Q

OSI

A

Open systems interconnections

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3
Q

RFC

A

Request for comments

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4
Q

What are the 5 layers of TCP/IP

A 
Application
Transport
Network
Data link
Physical
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5
Q

Http

A

Hypertext transfer protocol

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6
Q

URL

A

Uniform resource locator

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7
Q

UDP

A

User datagram protocol

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8
Q

Seq

A

Sequence number

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9
Q

DDN

A

Dotted Decimal Notation

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10
Q

WAN

A

Wide area network

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11
Q

LH and LT

A

Link header and link trailer

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12
Q

PDU

A

Protocol Data unit

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13
Q

What are the 7 layers of OSI

A 
7 Application
6 Presentation
5 Session
4 Transport
5 Network
6 Data Link
7 Physical
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14
Q

Provides an interface between software on a computer and the network itself. Does not define the application but the service the application needs.

A

TCP/IP application

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15
Q

Provides services to the application layer protocols that reside one layer higher in the TCP/IP model

A

TCP/IP Transport Layer

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16
Q

When a computer uses a protocol to communicate with the same layer on another computer it is called:

A

Same-layer interaction

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17
Q

When a layer on a single computer provides a service to a higher layer it is called:

A

Adjacent layer interaction

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18
Q

This layer is defined by the IP, each host computer has a different IP address

A

TCP/IP Network layer

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19
Q

What are the five layers of the TCP/IP?

A 
Application
Transport
Network
Data link
Physical
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20
Q

Provides an interface between the communications software and any applications that need to communicate outside the computer on which the application resides, and performs user authentication

A

OSI application layer

21
Q

Defines and negotiates data formats such as ASCII text, binary, JPEG, etc. also defines encryption

A

OSI protocol layer

22
Q

Defines how to start, control, and end conversations (called sessions). Bidirectional confirmation of sent/received messages

A

OSI session layer

23
Q

Data delivery to another computer. IE error recovery and flow control

A

OSI transport layer

24
Q

Defines three main features: logical addressing, routing (forwarding), and path determination

A

OSI network layer

25
Q

Defines the rules that determine when a device can send data over a particular medium. Formats the header and trailer

A

OSI data link

26
Q

Physical characteristics of the transmission. (Connectors, pins, etc) and rules for how to activate/deactivate physical mediums

A

OSI physical layer

27
Q

7 application
6 presentation
5 session
Name Sample OSI devices and protocols

A

Devices: Telnet, http, FTP, SMTP, pop3, VoIP, snmp
Protocols: hosts, firewalls

28
Q

4 Transport

Name OSI devices and protocol

A

Devices: hosts, firewalls
Protocols: TCP, UDP

29
Q

3 network

Name OSI devices and protocols

A

Devices: router
Protocols: IP

30
Q

2 data link

Name OSI devices and protocols

A

Devices: Ethernet (IEEE 802.3)
Protocols: LAN switc, WAP, cable modem, DSL modem

31
Q

1 physical

Name OSI devices and protocols

A

Devices: LAN hub, LAN repeater, cables
Protocols: RJ 45, Ethernet (IEEE 802.3)

32
Q

The process of HTTP asking TCP to send some data and making sure that it is received is an example of?

A

Adjacent layer interaction

33
Q

The process of one computer marking a TCP segment as segment 1 and the receiving computer acknowledging the receipt of TCP segment 1 is an example of?

A

Same layer interaction

34
Q

The process of a web server adding a TCP header and then adding a data link is an example of what?

A

Data encapsulation

35
Q

What is the term used to specifically identify the entity created when encapsulating data inside data link layer headers and trailers?

A

Frame

36
Q

Which OSI layer defies the functions of logical network wide addressing and routing

A

Layer 3, the network layer

37
Q

Which OSI layer denies the standards for cabling and connectors?

A

Layer 1, the physical layer

38
Q 
Which of the following terms are not valid terms for the names of the seven OSI layers?
Application
Data link
Transmission
Presentation
Internet
Session
A

Transmission and internet

39
Q

What are the four step for delivering IP packets from host to host

A

Encapsulation
Transmit
Deencapsulation
Receive

40
Q

What are the five steps of data encapsulation in TCP/IP?

A

1 create/encapsulate application data
2 encapsulate the data supplied by the application layer inside a transport layer
3 encapsulate the data supplied by the transport layer header
4 encapsulate the data supplied by the network layer inside a data link header and trailer
5 transmit the bits

41
Q

The header and trailer of the transport layering TCP|data

A

Segment

42
Q

The header and trailer for the network layer IP|data

A

Packet

43
Q

The header and trailer for the link layer LH|data|LT

A

Frame

44
Q

Compare the OSI and TCP/IP old and new models

7 application
6 presentation
5 session
4 transport
3 network
2 data link
1 physical
A 
7 application.       |
6 presentation      |  Application
5 session             |
4 transport           Transport
3 network            Network (internet old)
2 data link            Data link
1 physical             Physical 
1 & 2 link(old)
45
Q

What are the benefits of OSI layering?

A

Less complex, standard interfaces, easier to learn, multivendor interoperability, modular engineering

46
Q

Name and define The OSI encapsulation term

A

PDU - protocol data unit, represents the bits that include headers and trailers for that layer as well as the encapsulated data

47
Q

What is a protocol

A

A set of logical rules that devices must follow in order to communicate

48
Q

What is data encapsulation

A

The process of putting together headers (and sometimes trailers) around some data

49
Q

What is the networking model?

What do we use today

A

A comprehensive set of documents, TCP/IP

50
Q

To recover from errors TCP uses the concept of:

A

Acknowledgements

51
Q

IP’s most important features are:

A

Addressing and routing

ISDN1 (28 decks)

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