Networking Ch 2

Front 1

802.2

Back 1

The IEEE standard for error and flow control in data frames.

Front 2

802.3

Back 2

The IEEE standard for Ethernet networking devices and data handling (using the CSMA/CD access method).

Front 3

802.5

Back 3

The IEEE standard for token ring networking devices and data handling.

Front 4

802.11

Back 4

The IEEE standard for wireless networking.

Front 5

ACK (acknowledgement)

Back 5

A response generated at the transport layer of the OSI model that confirms to a sender that its frame was received.

Front 6

API (application programming interface)

Back 6

A set of routines that make up part of a software application.

Front 7

Application layer

Back 7

The seventh layer of the OSI model. Enables software programs to negotiate formatting, procedural, security, synchronization, and other requirements for the network.

Front 8

Checksum

Back 8

A method of error checking that determines if the contents of an arriving data unit match the contents of the data unit sent by the source.

Front 9

Connection oriented

Back 9

A type of transport layer protocol that requires the establishment of a connection between communicating nodes before it will transmit data.

Front 10

Connectionless

Back 10

A type of transport layer protocol that services a request without requiring a verified session and without guaranteeing delivery of data.

Front 11

CRC (cyclic redundancy check)

Back 11

An algorithm used to verify the accuracy of data contained in a data frame.

Front 12

Data link layer

Back 12

The second layer in the OSI model. Bridges the networking media with the network layer.its primary function is to divide the data it receives from the network layer into frames that can then be transmitted by the physical layer.

Front 13

Encapsulate

Back 13

The process of wrapping one layers PDU with protocol information so that it can be interpreted by a lower layer.

Hint 13

Data link layer protocols encapsulate network layer packets in frames.

Front 14

Ethernet

Back 14

A networking technology originally developed at Xerox in the 1970s and improved by digital equipment corporation, Intel, and Xerox.

Hint 14

IEEE 802.3 standard

Front 15

EUI-64

Back 15

The IEEE standard defining 64-bit physical addresses.

Front 16

Extension identifier

Back 16

A unique set of characters assigned to each NIC by its manufacturer.

Front 17

FCS (frame check sequence)

Back 17

The field in a frame responsible for ensuring that data carried by the frame arrives intact.

Hint 17

It uses an algorithm, such as CRC, to accomplish this verification.

Front 18

Flow control

Back 18

A method of gauging the appropriate rate of data transmission based on how fast the recipient can accept data.

Front 19

Fragmentation

Back 19

A network layer service that subdivides segments it receives from the transport layer into smaller packets.

Front 20

Frame

Back 20

A package for data that includes not only the raw data, or " payload" but also the senders and recipients addressing and control information.

Hint 20

Generated at the data link layer and are issued to the network at the physical layer.

Front 21

HTTP ( hypertext transfer protocol)

Back 21

An application layer protocol that formulate and interprets requests between web clients and servers.

Front 22

IP (internet protocol)

Back 22

A core protocol in the TCP/IP suite that operates in the network layer of OSI model and provides information about how and where data should be delivered.

Front 23

IP address

Back 23

The network layer address assigned to nodes to uniquely identify them on a TCP /IP network.

Hint 23

Ipv4 consists of 32 bits divided into four octets, or bytes. Ipv6 addresses are composed of eight 16-bit fields, for a total of 128 bits.

Front 24

ISP (internet service provider)

Back 24

A business that provides organizations and individuals with internet access and often, other services, such as E-mail and web hosting.

Front 25

LLC (logical link control) sublayer

Back 25

The upper sublayer in the data link layer.

Hint 25

Provides a common interfaces and supplies reliability and flow control services.

Front 26

MAC (media access control) sublayer

Back 26

The lower sublayer of the data link layer. Appends the physical address of the destination computer onto the frames.

Front 27

MTU (maximum transmission unit)

Back 27

The largest data unit a network will accept for transmission.

Hint 27

Ethernet or token ring

Front 28

Network address

Back 28

A unique identifying number for a network node that follows a hierarchical addressing scheme and can be assigned through operating system software.

Front 29

Network layer

Back 29

Third layer in the OSI model. Protocols translate network addresses into their physical counterparts and decide how to route data from the sender to the receiver.

Front 30

OSI (open system interconnection) model

Back 30

A model for understanding and developing computer-to- computer communication developed in the 1980s by OSI.

Front 31

PDU (protocol data unit)

Back 31

A unit of data at any layer of the OSI model.

Front 32

Physical address

Back 32

A 48- or 64-bit network interface identifier that includes two parts: the OUI, assigned by the IEEE to the manufacturer, and the extension identifier, a unique number assigned to each NIC by the manufacturer.

Front 33

Physical Layer

Back 33

The lowest, or first layer of the OSI model. Protocols in the physical layer generate and detect signals so as to transmit and receive data over a network medium.

Hint 33

These protocols also set the data transmission rate and monitor data error rates, but do not provide error correction.

Front 34

Presentation layer

Back 34

The sixth layer of the OSI model. Protocols in the presentation layer translate between the application and the network.

Hint 34

Data are formatted in a schema that the network can understand, with the format varying according to the type of network used.

Front 35

Reassembly

Back 35

The process of reconstructing data units that have been segmented

Front 36

Route

Back 36

To intelligently direct data between networks based on addressing, patterns of usage, and availability of network segments.

Front 37

Router

Back 37

A device that connects network segments and drects data based on information contained in the data packet.

Front 38

Segment

Back 38

A unit of data that results from subdividing a larger protocol data unit.

Front 39

Segmentation

Back 39

The process of decreasing the size of data units when moving data from a network that can handle larger data units to a network that can dandle only smaller data units.

Front 40

Sequencing

Back 40

The process of assigning a placeholder to each piece of a data block to allow the receiving node's transport layer to reassemble the data in the correct order.

Front 41

Session

Back 41

A connection for data exchange between two parties. the term may be used in the context of WEeb, remote access, or terminal and mainframe communications, for example.

Front 42

Session layer

Back 42

The fifth layer in the OSI model. establishes and maintains communication between two nodes on the network.

Hint 42

It can be considered the "traffic cop" for communications, such as videoconferencing, that require precisely coordinated data.

Front 43

Standard

Back 43

A documented agreement containing technical specifications or other precise criteria that are used as guidelines to ensure that materials, products, processes, and services suit their intended purpose

Front 44

SYN(synchronization)

Back 44

The packet one node sends to request a connection with another node on the network.

Hint 44

Is the first of three in the three-step process of establishing a connection.

Front 45

SYN-ACK(synchronization-acknowledgement)

Back 45

The packet a node sends to acknowledge to another node that it has received the SYN request for connection.

Front 46

Terminal

Back 46

A device with little (if any) of its own processing or disk capacity that depends on a host to supply it with applications and data-processing services.

Front 47

Three-way handshake

Back 47

A three-step process in which transport layer protocols establish a connection between nodes.

Hint 47

Steps: Node A issues a SYN packet to node B, node B responds with SYN-ACK, and node A responds with ACK.

Front 48

Token

Back 48

A special control frame that indicates to the rest of the network that a particular node has the right to transmit data.

Front 49

Token ring

Back 49

A networking technology developed by IBM in the 1980s.

It relies upon direct links between nodes and ring topology, using tokens to allow nodes to transmit data.

Front 50

Transport layer

Back 50

The fourth layer of the OSI model. Protocols ensure that data are transferred from point A to point B reliably and without error.

Hint 50

include flow control, acknowledgment, error correciton, segmentation, reassembly, and sequencing.

Front 51

TIA/EIA

Back 51

Your supervisor has asked you to correct several cable management problems that might be slowing down the network. Which organization's standards will guide you in assessing you firm's current cabling situation?

Front 52

Wireless Networks

Back 52

Which technology does the IEEE 802.11 specification describe?

Front 53

802.3

Back 53

You are configuring clients to communicate over an ethernet LAN. Which of the following IEEE specifications will identify which frame type your client should use.

Front 54

Transport Layer

Back 54

Which layer of the OSI model is responsible for issuing acknowledgments (ACKs)?

Front 55

Network Layer

Back 55

Suppose your network is connected to another network via a router. Which OSI model layer provides the information necessary to direct data between the two networks?

Front 56

Physical and data link layers

Back 56

In which two layers of the OSI model do NICs belong?

Front 57

Session

Back 57

Which OSI model layer is responsible for keeping open a communications path between your computer and the server when you dial in to a remote access server?

Front 58

When the destination node cannot accept the size of the data blocks transmitted by the source node.

Back 58

Under what circumstances would the Transport layer use segmentation?

Front 59

Physical layer

Back 59

Which OSI model layer generates and detects voltage so as to transmit and receive signals carrying data?

Front 60

Network layer

Back 60

An IP address is an example of what type of address?

Front 61

Re-transmit the data to the recipient

Back 61

If the TCP protocol did not receive an acknowledgment from data it transmitted, what would it do?

Front 62

The OUI

Back 62

Which part of a MAC address is unique to each manufacturer?

Front 63

To mark the end of a frame

Back 63

What is the purpose of the trailer field added to a frame in the data link layer?

Front 64

Data link layer

Back 64

Which layer of the OSI model encapsulates network layer packets?

Front 65

Transport layer

Back 65

At what OSI model layer do protocols manage data delivery priorities?

Front 66

Logic link control sublayer and Media access control sublayer

Back 66

What are the sublayers of the data link layer as defined in the IEEE 802 standards?

Front 67

The receiving node's data link layer requests a re-transmission.

Back 67

Suppose that, at the receiving node, a frame's FCS doesn't match the FCS it was issued at the transmitting node. What happens as a result?

Front 68

When viewing a movie on the web

Back 68

In which of the following situations would it be most desirable to use a connection less transport layer protocol?

Front 69

The source's physical address

Back 69

Which of the following would be found in a data link layer header?

Front 70

1500 bytes

Back 70

By default, what is the larges data payload that packets on an ethernet network can accept?