CCNA 1: CH1 Vocab

A digital network used to send data between computers

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.

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

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

Real-time communication between two or more people through text.

Ex: MSN, AIM, YahooMessanger....

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

Website where entries are made in journal style, created by a user who is in control of the style , visitors may leave comments, aka: weblog.

Digital media file(s) that are distributed over the Internet using syndication feeds, for playback on portable media players and PCs.

A website that lets visitors add, edit, and delete content typically anonymously.

A tool that helps people communicate & collaborate

• Examples:
• Wikidocs, Google Docs, Microsoft Sharepoint....

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

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

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

Allows communication without needing physical connectivity.

Including cell phones, PDAs, wireless access points, wireless NICs

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

Binary digit used in the binary numbering system

Digits are units of information storage and communication in computing.

Each bit is either a 1 or 0

A numbering system characterized by 1s & 0s

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

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

A network device that accesses a service on another computer remotely by accessing the network.

Internet Protocol

Network layer protocol in TCP/IP stack for a connectionless internetwork service. Provides features for Addressing, type-of-service specification, fragmentation, reassembly and security.

RFC 791

Transmission Control Protocol

Layer 4 protocol of the TCP/IP model

Lets applications guarantee delivery of data across a network.

A form of network that aggregates various forms of traffic such as voice, video and data on the same network infrastructure.

&/OR

Process by which routers recognize that something has occurred that changes some of the routers routes and reacts to the event to find another best route.

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

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

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

A combination of many IP subnets and networks, as created by building a network using routers.

Used to avoid confusion with the term network since an internetwork can include several IP networks.

[Generically]

refers to end-user data along with networking headers and trailers that are transmitted through a network.

[Specifically]

Is end-user data, along with network or Internet layer headers and an higher layer headers, but no lower-layer headers or trailers.

Quality of Service

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

Networking 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).

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

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

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

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