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IS3120 NETWORK COMMUNICATIONS INFRASTRUCTURE > IS 3120 CHAPTER 3 DEFINITIONS > Flashcards

IS 3120 CHAPTER 3 DEFINITIONS Flashcards

1
Q

Software that is used for PCs and workstations to mimic an IBM SNA mainframe terminal device.

A

3270 terminal emulation

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2
Q

A communications protocol that network devices use to find a Link Layer address (MAC address) from a NETWOK Layer address (IP address).

A

Address Resolution Protocol (ARP)

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3
Q

Loss or degradation of electrical signal

A

Attenuation

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4
Q

The collection of all nodes that are connected to the same set of repeaters, hubs, switches, and bridges.

A

Broadcast domain

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5
Q

A network device that combines the functionality of a switch/bridge and a router. The device uses MAC addresses for local devices and IP addresses for remote devices.

A

Brouter

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6
Q

A network layout that starts with a central high-speed cable. The main cable runs throughout the organization’s physical space and provides accessible connections anywhere along its length.

A

Bus topology

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7
Q

A mathematical calculation that verifies the length and integrity of the transmitted Ethernet frame to a destination.

A

Checksum

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8
Q

Refers to a network that sets up a circuit for each conversation. All messages during the conversation follow the same path from source to destination.

A

Circuit-switched

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9
Q

An application that allows multiple users to communicate online as a group.

A

Collaboration

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10
Q

Any time two or more network nodes transmit messages at the same time. A collision results in a garbled message.

A

Collision

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11
Q

Physical method to link network devices together.

A

Connection medium

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12
Q

The amount of time it takes for a network to find and initiate a backup or redundant link in the event of failure of a primary link.

A

Convergence

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13
Q

The media access control mechanism for how network-attached devices listen to the network before transmitting with collision detection.

A

CSMA/CD (carrier sense multiple access with collision detection)

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14
Q

A device located between a DTE device and a data transmission circuit. The DCE device converts a DTE signal into a transmission format for the attached circuit. A modem is a common DCE device.

A

Data circuit-terminating equipment (DCE)

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15
Q

A device that converts user input to signals, and converts received signals into user output. DTE devices normally allow users to interact with computer systems.

A

Data terminal equipment (DTE)

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16
Q

A terminal device that does little more than send and receive sequences of characters to and from a host computer.

A

Dumb terminal

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17
Q

An alliance of standards and trade organizations for electronics manufacturers in the US. EIA changed its name to Electronic Industries Alliance in 1997. EIA ceased operations as a unified organizations of February 11, 2011, but its member organizations still operate independently.

A

Electronic Industries Association (EIA)

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18
Q

Same as IEEE 802.1q. where Ethernet Frames are “labeled” with a “tag number” to designate a specific VLAN.

A

Ethernet tagging

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19
Q

A remotely accessible network that an organization makes accessible to its business partners and suppliers through the public Internet. An extranet is a secure network that requires proper access controls and authentication before granting access.

A

Extranet

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20
Q

The ability to encounter a fault, or error, of some type and still support critical operations.

A

Fault tolerance

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21
Q

A network layout that uses Layer 2 switching only and has no addressing hierarchy.

A

Flat topology

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22
Q

A term used to describe a Data Link Layer from format such as Ethernet v2.0 or IEEE 802.3 CSMA/CD etc..

A

Frame

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23
Q

A network topology in which all nodes are directly connected to every other node.

A

Fully connected mesh

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24
Q

A network device that connects tow networks that use different protocols.

A

Gateway

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25
Q

Refers to a computer system that consists of a central powerful computer with many users that connect directly to it.

A

Host-based

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26
Q

A simple network device with multiple ports that echoes every message it receives to all ports.

A

Hub

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27
Q

A network layout that contains several different topologies.

A

Hybrid topology

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28
Q

Standard for VLAN tagging

A

IEEE 802.1q

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29
Q

Standard for the Ethernet LAN specification.

A

IEEE 802.3 CSMA/CD

30
Q

Power over Ethernet standard and specification up to 15.4 watts of electrical power.

A

IEEE 802.3af-2003

31
Q

Power over Ethernet standard and specification up to 25.5 watts of electrical power.

A

IEEE 802.3at-2009

32
Q

Standard for 4Mbps/16Mbps token ring LANs.

A

IEEE 802.5 token ring

33
Q

A real-time communication application supported by SIP; it offers text messaging between users.

A

Instant message (IM chat)

34
Q

Institute of Electrical and Electronics Engineers (IEEE)

A

Institute of Electrical and Electronics Engineers (IEEE)

35
Q

The interconnecting of two or more LANs or networks.

A

Internetworking

36
Q

An internal network, generally only accessible from locations in an organization’s physical space.

A

Intranet

37
Q

A term used to represent the OSI model Data Link Layer.

A

Layer 2

38
Q

A term used to represent the OSI model Network Layer.

A

Layer 3

39
Q

A picture of how networks transfer data between nodes.

A

Logical topology

40
Q

A network device that creates the MAC address table by learning where all the MAC layer addresses are of other devices.

A

MAC layer bridge

41
Q

A network layout in which all nodes are directly connected to most, or all, other nodes.

A

Mesh topology

42
Q

The number of connections required in a fully connected network is proportional to the square of the number of devices. The formula to calculate the number of wires you need to connect all devices in a network with in devices is: n(n-1)/2

A

Metcalfe’s law

43
Q

A hardware device that connects a computer or other device to network media.

A

Network adapter

44
Q

A hardware device that connects a computer or other device to network media.

A

Network interface card

45
Q

A hardware device that connects a computer or other device to network media.

A

Network interface controller (NIC)

46
Q

A process through which a node gains access to a wireless network running WEP and access files that are not encrypted.

A

Open Systems Interconnection (OSI) Reference Model

47
Q

A small, easily managed chunk of a network message. Networks often chop up messages and transmit each chunk separately.

A

Packet

48
Q

Refers to a network that chops up network messages into smaller chunks and sends each chunk, or packet, separately. Each packet can take a different path from source to destination.

A

Packet-switched

49
Q

A network layout in which network nodes connect to only some of the other nodes.

A

Partially connected mesh

50
Q

The number of steps a message takes to get from the sender to the receiver.

A

Path length

51
Q

A picture of the actual network devices and the medium the devices use to connect to the network.

A

Physical topology

52
Q

Voice-grade telephone service network. POTS generally refers to the analog predecessor of today’s telecommunication networks.

A

Plain old telephone service (POTS)

53
Q

Refers to a network layout in which computers or devices are directly connected to one another.

A

Point-to-point

54
Q

An IEEE standard for providing electrical power to an IP phone from an Ethernet switch in the wiring closet..

A

Power over Ethernet (PoT)

55
Q

Voice-grade telephone service network. POTS generally refers to the analog predecessor of today’s telecommunication networks.

A

Public Switched Telephone Network (PSTN)

56
Q

A technology that exchanges data through a wireless connection between a reader and a tag attached to product to track the movement of the product.

A

Rapid Spanning Tree Protocol (RSTP)

57
Q

Another term for redundancy or failover; specifically, a condition in which a network can can “bounce back” from failures because its Physical Layer media, Layer 2 network access functions, and Layer 3 forwarding and addressing functions have hot-swap redundancy.

A

Resiliency/Resilience

58
Q

A network layout in which each computer connects to two other computers. The computers connect to one another in a virtual ring.

A

Ring topology

59
Q

A device that operates at OSI Layer 3 (Network Layer) to determine the destination address for network messages.

A

Router

60
Q

A set of EIA standards for serial binary data and control signals that connect DTE and DCE devices. It is a common standard used for computer serial ports.

A

RS-232

61
Q

A communication method in which a device sends individual characters, one at a time.

A

Serial communications

62
Q

A network protocol that identifies infinite loops in switched networks and helps devices direct packets around loops.

A

Spanning Tree Protocol (STP)

63
Q

A network layout in which a central network device connects to all other network devices.

A

Star-wired topology

64
Q

A network device that receives a message, examines the destination address, and sends the message directly to the destination (or directly to the next device nearest to the destination).

A

Switch

65
Q

By far the most popular set of standards used today to communicate over networks, this suite of protocols takes its name from the most common two protocols at its core: Transmission Control Protocol and Internet Protocol.

A

TCP/IP (Internet Protocol) suite

66
Q

A device that has a keyboard and a monitor that connects to a computer system and interacts with it.

A

Terminal

67
Q

A special message that authorizes a device to transmit.

A

Token

68
Q

An estimate of the total direct and indirect financial costs associated with a product or service.

A

Total cost of ownership (TCO)

69
Q

A network protocol that guarantees the delivery of a reliable stream of data between two computer programs. It operates at OSI Layer 4.

A

Transmission Control Protocol (TCP)

70
Q

A group of network nodes that are logically grouped together to form a single broadcast domain.

A

Virtual LAN (VLAN)

IS3120 NETWORK COMMUNICATIONS INFRASTRUCTURE (15 decks)

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