IS 3120 CHAPTER 3 DEFINITIONS

Question 1

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

Answer 1

3270 terminal emulation

Question 2

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

Answer 2

Address Resolution Protocol (ARP)

Question 3

Loss or degradation of electrical signal

Answer 3

Attenuation

Question 4

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

Answer 4

Broadcast domain

Question 5

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.

Answer 5

Brouter

Question 6

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.

Answer 6

Bus topology

Question 7

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

Answer 7

Checksum

Question 8

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.

Answer 8

Circuit-switched

Question 9

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

Answer 9

Collaboration

Question 10

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

Answer 10

Collision

Question 11

Physical method to link network devices together.

Answer 11

Connection medium

Question 12

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.

Answer 12

Convergence

Question 13

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

Answer 13

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

Question 14

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.

Answer 14

Data circuit-terminating equipment (DCE)

Question 15

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.

Answer 15

Data terminal equipment (DTE)

Question 16

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

Answer 16

Dumb terminal

Question 17

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.

Answer 17

Electronic Industries Association (EIA)

Question 18

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

Answer 18

Ethernet tagging

Question 19

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.

Answer 19

Extranet

Question 20

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

Answer 20

Fault tolerance

Question 21

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

Answer 21

Flat topology

Question 22

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

Answer 22

Frame

Question 23

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

Answer 23

Fully connected mesh

Question 24

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

Answer 24

Gateway

Question 25

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

Answer 25

Host-based

Question 26

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

Answer 26

Hub

Question 27

A network layout that contains several different topologies.

Answer 27

Hybrid topology

Question 28

Standard for VLAN tagging

Answer 28

IEEE 802.1q

Question 29

Standard for the Ethernet LAN specification.

Answer 29

IEEE 802.3 CSMA/CD

Question 30

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

Answer 30

IEEE 802.3af-2003

Question 31

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

Answer 31

IEEE 802.3at-2009

Question 32

Standard for 4Mbps/16Mbps token ring LANs.

Answer 32

IEEE 802.5 token ring

Question 33

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

Answer 33

Instant message (IM chat)

Question 34

Institute of Electrical and Electronics Engineers (IEEE)

Answer 34

Institute of Electrical and Electronics Engineers (IEEE)

Question 35

The interconnecting of two or more LANs or networks.

Answer 35

Internetworking

Question 36

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

Answer 36

Intranet

Question 37

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

Answer 37

Layer 2

Question 38

A term used to represent the OSI model Network Layer.

Answer 38

Layer 3

Question 39

A picture of how networks transfer data between nodes.

Answer 39

Logical topology

Question 40

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

Answer 40

MAC layer bridge

Question 41

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

Answer 41

Mesh topology

Question 42

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

Answer 42

Metcalfe's law

Question 43

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

Answer 43

Network adapter

Question 44

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

Answer 44

Network interface card

Question 45

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

Answer 45

Network interface controller (NIC)

Question 46

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

Answer 46

Open Systems Interconnection (OSI) Reference Model

Question 47

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

Answer 47

Packet

Question 48

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.

Answer 48

Packet-switched

Question 49

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

Answer 49

Partially connected mesh

Question 50

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

Answer 50

Path length

Question 51

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

Answer 51

Physical topology

Question 52

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

Answer 52

Plain old telephone service (POTS)

Question 53

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

Answer 53

Point-to-point

Question 54

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

Answer 54

Power over Ethernet (PoT)

Question 55

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

Answer 55

Public Switched Telephone Network (PSTN)

Question 56

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.

Answer 56

Rapid Spanning Tree Protocol (RSTP)

Question 57

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.

Answer 57

Resiliency/Resilience

Question 58

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

Answer 58

Ring topology

Question 59

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

Answer 59

Router

Question 60

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.

Answer 60

RS-232

Question 61

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

Answer 61

Serial communications

Question 62

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

Answer 62

Spanning Tree Protocol (STP)

Question 63

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

Answer 63

Star-wired topology

Question 64

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).

Answer 64

Switch

Question 65

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.

Answer 65

TCP/IP (Internet Protocol) suite

Question 66

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

Answer 66

Terminal

Question 67

A special message that authorizes a device to transmit.

Answer 67

Token

Question 68

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

Answer 68

Total cost of ownership (TCO)

Question 69

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

Answer 69

Transmission Control Protocol (TCP)

Question 70

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

Answer 70

Virtual LAN (VLAN)