Networking Fundamentals: Chapter 1
Quality of Service (QoS)
A controlled Mechanism that can provide different priority to different users or data flows, or guarantee a carton level of performance in a data flow in accordance with requests from the application program.
Hashing Algorithms
A form of reproducible method of turning some kids data into a (relativity) small number that my serve as a digital "fingerprint" of the data. The algorithm "Chips and mixes" (i.e., substitution or transposes that data to create such fingerprints, called hash values.
Checksum
A from of redundancy check, a simple a simple way to protect the integrity of the data by detecting error in data sent through space (Telecommunications) or time (storage). At works by adding basic components of a message, typically the assorted bits, and storing the resulting Values. Anyone can later preform the same operation on the data; compare the result of the authentic checksums, and (Assuming that the sums match) concluding that the message was not corrupted.
Firewall
A hardware application or software device designed to protect network devises from outside network users and/or malicious applications or files.
Digital signature
A type of asymmetric cryptography used to simulate the security properties of a signature in digital from rather then written from.
Wiki
A website that lets visitors add, edit, or delete content, typically without the need for registration. A good example of this is a site called Wikipedia where visitors can access the website and add their commentaries to already written articles or a new article
Electronic Mail (abbreviated "e-mail" or, often, "mail) is a store and forward method of composing, sending, string and receiving messages over electronic communication system.
Source
The origin of a message.
Hardware
The physical components of a computer, such as the hard drive. Memory chip, motherboard, CPU, etc.
Download
Transferring of data (usually a file) from another computer to the computer you are using.
TCP/IP
Transmission Control protocol/internet protocol. Common named for the suite protocols developed by the U.S. DoD in the 1970 to support the construction of worldwide internetworks. TCP and IP are the two best know protocols in the suite.
Cloud
Used to represent Internet communications without showing specific details of the network structure. The cloud typically is used to hide of layer 1 and layer 2. (Symbol)
Software
program or codes used by computer to carry out certain functions.
Covered Newark
A Network that allows for voice, video and data to use in the same IP network
Bits
A binary digit, taking the value of o or 1. Binary digits are units of information storage and communication in computing.
Computer ViruS
A computer program that can copy itself and infect a computer without permission of knowledge of the user.
Server
A computer that provides services to Clements. Servers are the central point in a client/server model networks. There exist many services that a server can provide to network clients. For example: DNS, DHCP, File storage, application hosting, web site hosting.
Binary
A numbering system categorized by ones and zeroes (1 = on and 0 = off).
Authentication
A proses whereupon a person must prove that they are legitimate users of a certain resource
Internet
A publicly accessible Network of interconnected Computer Networks that transmit data by using IP, the Internet protocol
Proses
A series of progressive and independent steps in witch an end is attained.
Standard
An internationally recognized definition of technical specifications the insure worldwide consistency
Applications
Complete software designed for end users.
Coaxial
Components the share the same axis. In the case of a Coaxial cable there are three different layers surrounding the inner coding material. The outer conductor, the insulator and the protective outer jacket.
Points of failure
Describes any part of a system that can, if it fails, can cause a interruption of required service.
Data Networks
Digital networks used to send between computers.
End-to-end
End user device to an end user device.
Real-Time
Events or signals that show output as fast as possible, or ass they happen.
Media
In the context of this course media is the plural form of medium.
UTP
Is a four-pair wire medium used in variety of networks. UTP dose not require the fixed spacing between connectors that is necessary between coaxial type connections. There are five types of UTP cables commonly used: Category 3 cabling, Category 4 cabling, Category 5 cabling.
Network
Is multiple computers connected together using communication system. The purpose of a network is for computers to communicate and share files.
Packet
Logical grouping of information that includes a header containing central information and (usually) user data. Packets are most often referred to as the network layer units of data. The term datagram, frame, message, segment are also used to describe a logical information groups at the various layers of the IOS model and various technology circles.
Rounder
Networking layer device that uses one or more metrics to determine the optimal path along witch network traffic should be forward. Rounder's forward packets from one network to another based on network layer information.
Extranets
Part of a company's Intranet that is extended to users outside the company (e.g.: namely over the Internet)
Routing
Proses of finding a path to a destination host. Rounding is a very complex in large networks because of many protocols intermediate destinations a packet might traverse before reaching its destination host.
Instant messaging
Real-Time communication between two or more people Via Text or other data.
Collaboration tool
Something that helps people work together on a particular file or peace of software. Many People use the term collaboration tool in a software context, for instance, collaboration software such as goggle docs, Microsoft Sharepoint server.
Flow
Stream of data traveling between two endpoints of a network. (Foe example, form one lane station to another.) Multiple flows can be transformed on a single Circuit.
Wireless Technology
Technology that allows communication without needing of physical connectivity. Examples of Wireless Technology cellular telephones, Personal digital assistance, (PDA's,) Wireless access points and Wireless NIC's
Stream
The continuous transmissions of data form one location to another. For example a streaming of video is a continuous real-time flow of the video being downloaded as you watch the video.
Internetwork
The interconnection between two or more different networks.
Medium
a physical medium in which data is transferred. For example, UTP is for of networking media.
Podcasting
digital media file of files that are distributed over the Internet using syndication feeds, for playback on portable media players and personal computers.
