Ch. 1 The TCP/IP and OSI Networking Models

Question 0

IP

Answer 0

Internet protocol

Question 1

TCP

Answer 1

Transmission Control Protocol

Question 2

OSI

Answer 2

Open systems interconnections

Question 3

RFC

Answer 3

Request for comments

Question 4

What are the 5 layers of TCP/IP

Answer 4

Application
Transport
Network
Data link
Physical

Question 5

Http

Answer 5

Hypertext transfer protocol

Question 6

URL

Answer 6

Uniform resource locator

Question 7

UDP

Answer 7

User datagram protocol

Question 8

Seq

Answer 8

Sequence number

Question 9

DDN

Answer 9

Dotted Decimal Notation

Question 10

WAN

Answer 10

Wide area network

Question 11

LH and LT

Answer 11

Link header and link trailer

Question 12

PDU

Answer 12

Protocol Data unit

Question 13

What are the 7 layers of OSI

Answer 13

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

Question 14

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

Answer 14

TCP/IP application

Question 15

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

Answer 15

TCP/IP Transport Layer

Question 16

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

Answer 16

Same-layer interaction

Question 17

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

Answer 17

Adjacent layer interaction

Question 18

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

Answer 18

TCP/IP Network layer

Question 19

What are the five layers of the TCP/IP?

Answer 19

Application
Transport
Network
Data link
Physical

Question 20

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

Answer 20

OSI application layer

Question 21

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

Answer 21

OSI protocol layer

Question 22

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

Answer 22

OSI session layer

Question 23

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

Answer 23

OSI transport layer

Question 24

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

Answer 24

OSI network layer

Question 25

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

Answer 25

OSI data link

Question 26

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

Answer 26

OSI physical layer

Question 27

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

Answer 27

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

Question 28

4 Transport | Name OSI devices and protocol

Answer 28

Devices: hosts, firewalls Protocols: TCP, UDP

Question 29

3 network | Name OSI devices and protocols

Answer 29

Devices: router Protocols: IP

Question 30

2 data link | Name OSI devices and protocols

Answer 30

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

Question 31

1 physical | Name OSI devices and protocols

Answer 31

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

Question 32

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

Answer 32

Adjacent layer interaction

Question 33

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?

Answer 33

Same layer interaction

Question 34

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

Answer 34

Data encapsulation

Question 35

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

Answer 35

Frame

Question 36

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

Answer 36

Layer 3, the network layer

Question 37

Which OSI layer denies the standards for cabling and connectors?

Answer 37

Layer 1, the physical layer

Question 38

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

Answer 38

Transmission and internet

Question 39

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

Answer 39

Encapsulation Transmit Deencapsulation Receive

Question 40

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

Answer 40

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

Question 41

The header and trailer of the transport layering TCP|data

Answer 41

Segment

Question 42

The header and trailer for the network layer IP|data

Answer 42

Packet

Question 43

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

Answer 43

Frame

Question 44

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 ```

Answer 44

``` 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) ```

Question 45

What are the benefits of OSI layering?

Answer 45

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

Question 46

Name and define The OSI encapsulation term

Answer 46

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

Question 47

What is a protocol

Answer 47

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

Question 48

What is data encapsulation

Answer 48

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

Question 49

What is the networking model? | What do we use today

Answer 49

A comprehensive set of documents, TCP/IP

Question 50

To recover from errors TCP uses the concept of:

Answer 50

Acknowledgements

Question 51

IP's most important features are:

Answer 51

Addressing and routing