Ccna - Chapter 1

Front 1

Data Network

Back 1

A digital network used to send data between computers

Front 2

network

Back 2

1. Collection of computers, printers, routers, switches, and other devices that can communicate with each other over some transmission medium. 2. Command that assigns a NIC-based address to which the router is directly connected.

Front 3

internet

Back 3

The network that combines enterprise networks, individual users, and ISPs into a single global IP network.

Front 4

download

Back 4

To transfer data from the computer functioning as a server to the client computer you are using.

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instant messaging

Back 5

Real-time communication between two or more people through text. The text is conveyed through computers connected over a network such as the Internet. Files can also be transferred through the IM program to share files. A good example of an IM program is Microsoft Messenger.

Front 6

real-time

Back 6

Events or signals that show output as fast as possible, or as they happen.

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blogs

Back 7

A website where entries are made in journal style. A blog is created by the user; who can make changes to the blog through templates or by altering the HTML code of the blog itself. Visitors can leave posts to the blog. Blog is short for weblog.

Front 8

podcasts

Back 8

A digital media file or files that are distributed over the Internet using syndication feeds, for playback on portable media players and personal computers.

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wikis

Back 9

A website that lets visitors add, edit, and delete content, typically without the need for registration. A good example of this is the site Wikipedia.com, where visitors can access the website and add their commentaries to already written articles or create a new article.

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collaboration tool

Back 10

Something that helps people collaborate. Many people use the term 'collaboration' software such as Google Docs and Microsoft Sharepoint Server. Going back in time, a collaboration tool was a piece of paper that many used and edited.

Front 11

packet tracer

Back 11

A drag-and-drop network simulator developed by Cisco to design, configure, and troubleshoot network equipment within a controlled, simulated program environment.

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intranet

Back 12

A corporate system such as a website that is explicitly used by internal employees. Can be accessed internally or remotely.

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extranet

Back 13

Part of a company's intranet that is extended to users outside the company (that is, normally over the internet).

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wireless technology

Back 14

Technology that allows communication without needing physical connectivity. Examples of wireless technology include cellular telephones, personal digital assistants (PDA), wireless access points, and wireless NICs.

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standards

Back 15

An internationally recognized definition of technical specifications that ensure worldwide consistency.

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bits

Back 16

Binary digit used in the binary numbering system. Binary digits are units of information storage and communication in computing. Each bit can be either a 0 or a 1.

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binary

Back 17

A numbering system characterized by 1's and 0's

Front 18

source

Back 18

The origin of the PDU. This can be a process, a host, or a node, depending on the layer to which you are referring.

Front 19

router

Back 19

A network device, typically connected to a range of LAN and WAN interfaces, that forwards packets based on their destination IP addresses.

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cloud

Back 20

In networking, a symbol used when drawing network diagrams that represent a part of the network whose details can be ignored for the purposes of the diagram.

Front 21

IP (Internet Protocol)

Back 21

Network layer protocol in the TCP/IP stack offering a connectionless internet-work service. IP provides features for addressing, type-of-service specification, fragmentation and reassembly, and security.

Front 22

TCP (Transmission Control Protocol)

Back 22

A Layer 4 protocol of the TCP/IP model, TCP lets application guarantee delivery of the data across a network.

Front 23

convergence

Back 23

Another form of the root word converge in the phrase "converged network." This kind of network aggregates various forms of traffic such as voice, video, and data on the same network infrastructure. A more common usage represents the process by which routers recognize that something has occurred that changes some routers' routes, reacts to the event, and finds the now-currently best routes.

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fault tolerance

Back 24

The design on networks that can continue operate without interruption in the case of hardware, software, or communications failures.

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redundancy

Back 25

A network architecture designed to eliminate network downtime caused by a single point of failure.

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scalability

Back 26

The ability of a protocol, system, or component to be modified to fit a new need.

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internetwork

Back 27

A combination of many IP subnets and networks, as created by building a network using routers. The term internetwork is used to avoid confusion with the term network, because internetwork can included several IP networks.

Front 28

packet

Back 28

When used generically, this term refers to end-user data along with networking headers and trailers that are transmitted through a network. When used specifically, it is end-user data, along with the network or Internet layer headers and any higher-layer headers, but no lower-layer headers or trailers.

Front 29

quality of service (QoS)

Back 29

A control mechanism that can provide different priorities to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with request from the application program.

Front 30

bandwidth

Back 30

In networking, a measurement of the speed of bits that can be transmitted over a particular link. It is the amount of data that can be transmitted in a certain amount of time. For digital bandwidth, it is usually expressed in bits per second (bps).

Front 31

priority queuing

Back 31

A routing feature in which frames in an interface output queue are prioritized based on various characteristics such as packet size and interface type.

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authentication

Back 32

A process used to verify the identity of a person or process.

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firewall

Back 33

Any combination of hardware device and/or software application designed to protect network devices from outside network users and/or malicious application and files.

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single point of failure

Back 34

A system or network design characterized by one or more major components that are required to maintain operation.