Internetworking

Question 1

What are the upper layers of OSI

Answer 1

Application, Presentation, Session

Question 2

What are the lower layers of OSI

Answer 2

Transport, Network, Data Link, Physical

Question 3

This provides a user interface

Answer 3

Application

Question 4

This presents data and handles processing such as encryption

Answer 4

Presentation

Question 5

This keeps different applications’ data separate

Answer 5

session

Question 6

This provides reliable or unreliable delivery and performs error correction before retransmit

Answer 6

Transport

Question 7

Provides logical addressing, which routers use for path determination

Answer 7

Network

Question 8

Combines packets into bytes and bytes into frames, provides access to media using MAC address, performs error detection not correction

Answer 8

Data Link

Question 9

Moves bits between devices, Specifies voltage, wire speed, and pinout of cables

Answer 9

Physical

Question 10

The following network devices operate at all seven layers of the OSI model

Answer 10

Network Management Stations (NMSs)

Web and Application Servers

Gateways

Servers

Network Hosts

Question 11

File, print, message, database, and application services

Answer 11

Application

Question 12

Data encryption, compression, and translation services

Answer 12

Presentation

Question 13

Dialog control

Answer 13

Session

Question 14

End-to-end connection

Answer 14

Transport

Question 15

Routing

Answer 15

Network

Question 16

Framing

Answer 16

Data Link

Question 17

Physical Topology

Answer 17

Physical

Question 18

Examples of events for the application layer

Answer 18

File transfers, email, enabling remote access, network management activities, client/server processes, information location

Question 19

This presents data to the application layer and is responsible for data translation and code formatting

Answer 19

Presentation Layer

Question 20

Responsible for setting up, managing, and dismantling sessions between presentation layer entities and keeping user data separate. Dialog control between devices also occurs at this layer

Answer 20

Session Layer

Question 21

Simple one-way communication

Answer 21

Simplex

Question 22

Actual two-way communication, but it can take place only one direction at a time, preventing the interruption of the transmitting device

Answer 22

Half-Duplex

Question 23

Exactly like a real conversation where devices can transmit and receive at the same time

Answer 23

Full-duplex

Question 24

a device that transmit and establish a connection-oriented communciation session with a remote device

Answer 24

call setup or a three way handshake

Question 25

segments and reassembles data into a single data stream

Answer 25

transport layer

Question 26

the two operating systems communicate by sending messages over the network confirming that the transfer is approved and that both sides are ready for it to take place

Answer 26

connection-oriented communication

Question 27

ensures data integrity at the transport layer by allowing applications to request reliable data transport between systems

Answer 27

flow control

Question 28

prevents a sending host on one side of the connection from overflowing the buffers in the receiving host

Answer 28

Flow control

Question 29

a service is considered connection-oriented if it has the following characteristics

Answer 29

virtual circuit or three way handshake, uses sequencing, uses acknowledgements, uses flow control

Question 30

quantity of data segments, measured in bytes, that the transmitting machine is allowed to send without receiving an acknowledgement

Answer 30

windowing

Question 31

reliable data delivery ensures the integrity of a stream of data sent from one machine to the other through a fully functional data link

Answer 31

acknowledgements

Question 32

technique that requires a receiving machine to communicate with the transmitting source by sending an acknowledgement message back to the sender when it receives data

Answer 32

positive acknowledgement

Question 33

manages device addressing, tracks the location of devices on the network and determines the best way to move data transport traffic between devices that aren't locally attached

Answer 33

network layer

Question 34

used to transport user data through the internetwork

Answer 34

data packets

Question 35

these packets are used to update neigjboring routers about the networks connected to all routers within the internetwork

Answer 35

route update packets

Question 36

send route update packets

Answer 36

routing protocols

Question 37

protocols used to support data traffic are called

Answer 37

routed protocols

Question 38

specific network addresses. a router must maintain a routing table for individual routing protocols because each routed protocol keeps track of a network with a different addressing scheme

Answer 38

network addresses protocol

Question 39

the exit interface a packet will take when destined for a specific network

Answer 39

interface

Question 40

the distance to the remote network. different routing protocols use different ways of computing this distance

Answer 40

metric

Question 41

provides for the physical transmission of data and handles error notification, network topology, and flow control

Answer 41

data link layer

Question 42

ensures that messages are delivered to the proper device on a LAN using hardware addresses and will translate messages from the network layer into bits for the physical layer to transmit

Answer 42

Data link layer

Question 43

the ___ formats the messages, each called a data frame, and adds a customized header containing the hardware destination and source address

Answer 43

data link layer

Question 44

defines how packets are placed on the media first come/first served everyone shares the same bandwidth

Answer 44

media access control

Question 45

signal path through a physical topology

Answer 45

logical topology

Question 46

responsible for identifying network layer protocols and then encapsulating them

Answer 46

logical link control

Question 47

considered hardware-based bridging because it uses specialized hardware called an application-specific integrated circuit (ASIC)

Answer 47

layer 2 switching

Question 48

what does ASIC mean

Answer 48

application-specific integrated circuit

Question 49

this sends and receives bits

Answer 49

physical layer

Question 50

this comes in values of 1 or 0

Answer 50

bits

Question 51

multiple port repeater

Answer 51

hub

Question 52

receives digital signal, reamplifies or regenerates that signal, then forwards the signal out the other port without looking at any dataa

Answer 52

repeater

Question 53

any digital signal received is regenerated or reamplified and transmitted out all other ports on the hub

Answer 53

hub

Question 54

refers to the physical layout of the devices but mostly the cabling and cabling layout

Answer 54

physical topology

Question 55

defines the logical path on which the signal will travel on the physical topology

Answer 55

logical topology