Flashcards
internet flashcard
Flashcards do conjunto (72)
- 1ISP
- 2Internet infrastructure
- 3serverin computers there is a piece of hardware or software which allows the computer to function for other devices called clients
- 4clienta client is another piece of hardware that u can access the internet with like a computer/phone ect.
- 5ISP connections
- 6backbonea big cable often fiber optic that connects a large number of devices in the core
- 7routera router is something that receives a connection from a sat alight then gives out a connection for you to use the internet
- 8ISPan internet service provider organization that provide a bunch of services to access
- 9point of presence. POPA common example is an ISP point of presence, the local access point that allows users to connect to the Internet with their Internet service
- 10network access pointA common example is an ISP point of presence, the local access point that allows users to connect to the Internet with their Internet service
- 11dial up connections advantage and disadvantageone advantage is you can use existing telephone wires. another advantage is that they give a connection when a broadband is not available
- 12broadband advantage and disadvantageone advantage is you get better reception so you also get better speed and dial up a disadvantage is they have to be wired up and they have to be used stationary on a computer
- 13wireless advantage and disadvantageits not fixed to a stationary computer and it can be used whenever wireless internet is available. one disadvantage is it needs to have a wireless connection available and theyre less secure than wired connections
- 14table with converted download time
- 15HTTPHypertext transfer protocol HTTP is the set of rules that handle what we do on the web.it handles your request to load a page.
- 16HTTPShypertext transfer proto col secure. the s means secure. data in the webpage is scrambled before sending across the internet. so if data is intercepted it cant be understood
- 17FTPfile transfer protocol. an old protocol that was invented even before the web was born. it is still used to upload and download files from a server. its often used by web developers to transfer their files to their web server.
- 18NAPnetwork access point
- 19web protocolsthere are several protocols
- 20server sideIn the client server model, server side refers to programs and operations that run on the server.
- 21client sideeverything a web application that is displayed or takes place on the client. this includes what the user sees, such as text images and the rest of the UI
- 22search enginea web crawler, or spider, is a type of bot that is typically operated by search engines like Google and Bing. Their purpose is to index the content of websites all across the Internet so that those websites can appear in search engine results
- 23indexWhat is an index in computer?
An index is a method of sorting data by creating keywords or a listing of the data. - 24store and forwardStore and forward is a telecommunications technique in which information is sent to an intermediate station where it is kept and sent at a later time to the final destination or to another intermediate station
- 25CCCarbon copy noun. a duplicate copy of writing
- 26BCCBlind carbon copy is when you send a email to others but they wont see your email address.
- 27benefits of using email-no fee
- - 28smtpSMTP (Simple Mail Transfer Protocol) is the basic standard that mail servers use to send email to one another across the internet. SMTP is also used by applications such as Apple Mail or Outlook to upload emails to mail servers that then relay them to other mail servers
- 29imapIMAP stands for Internet Message Access Protocol, and it's the open standard that describes how to access messages in an email mailbox.
- 30pop 3POP3 is a one-way client-server protocol in which email is received and held on the email server
- 31web mailan email system in which a user can access their emails via a browser on any computer or device that is connected to the internet.
- 32email clientPopular email clients include Microsoft Outlook, Mozilla Thunderbird, macOS Mail, IncrediMail, Mailbox and iOS Mail.
- 33exchange data packet slide
- 34packet switchingPacket switching is the transfer of small pieces of data across various networks. These data chunks or “packets” allow for faster, more efficient data transfer. Often, when a user sends a file across a network, it gets transferred in smaller data packets, not in one piece.
- 35advantages of packet switchingData packets are able to find the destination without the use of a dedicated channel. Reduces lost data packets because packet switching allows for resending of packets. More cost-effective since there is no need for a dedicated channel for voice or data traffic.
- 36disadvantages of packet switchingNot ideal for applications that are in constant use, such as high volume voice calls.
High-volume networks can lose data packets during high-traffic times; those data packets cannot be recovered or resent during transmission. - 37codecsA codec is a device or computer program which encodes or decodes a data stream or signal. Codec is a portmanteau of coder/decoder. In electronic communications, an endec is a device which acts as both an encoder and a decoder on a signal or data
- 38simplex(one way)signals go on in one direction at a time
- 39full duplex(two way)signals go in both directions at the same time
- 40half duplex(take turns)signals go in both directions, but not simultaneous
- 41utp/stpcontains pairs of copper wires twisted together. used for lans
- 42coaxial cablesolid copper wire with thick shielding. used to connect to tvs with the ariel
- 43fibre opticstands of glass carrys data as light. used in backbones for network. advantages theyre fast, used over long distances, and little inferences. disadvantages for it is,
- 44infrareduses infrared light to transmit data which is a high frequency light. an advantage is theyre reliable and a disadvantage is theyre short range and the device must be line of site with the tv
- 45microwaveuses waves with short wave lengths to transmit data
- 46satelliteuses satellites in space to relay data between points on earth e.g gps theyre also really good for long distance but theyre very expensive
- 47NICstands for network inference card. recieves wireless signals and built into modern devices such as tablets and phones ext NIC connects to NAP
- 48NAPstands for network access point. lots of place to offer NAP's such as cafes and libraries.
- 49server side processingserver processing uses the web server to process web page data. the interactivity on the webpage is processed on the web server.
- 50client side processingclient processing uses the clients computer to process web page data in data exchange. the interactivity
- 51database-a data base is a structure of data
-a table that stores a set of data e.g details of all the students in the school.
-a record is one row that stores data about a single item e.g a students details
-a field is a special field with a unique identifier e.g forename , surname, gender, date of birth
-a primary key is a special field with a unique identifier e.g a student ID - 52table-a table that stores a set of data e.g details of all the students in the school.
- 53field-a field is a special field with a unique identifier e.g forename , surname, gender, date of birth
- 54primary key-a primary key is a special field with a unique identifier e.g a student ID
- 55record-a record is one row that stores data about a single item e.g a students details
- 56foreign key a set of attributes in a table thatsa set of attributes in a table that refers to the primary key of another table.
- 57booleanIn computer science, the Boolean data type is a data type that has one of two possible values which is intended to represent the two truth values of logic and Boolean algebra. It is named after George Boole, who first defined an algebraic system of logic in the mid 19th century.
- 58online data baseAn online database is a database accessible from a local network or the Internet, as opposed to one that is stored locally on an individual computer or its attached storage (such as a CD). Online databases are hosted on websites, made available as software as a service products accessible via a web browser.
- 59local data baseA local database is one that is local to your application only. It uses an SDF data file, which is SQL Server CE (Compact Edition) format. There is no need to install a server to access an SDF database.
- 60features of an online data baseUser Access. Secure access for your users to manage their data.
Workflow & Automation. The right data for the right users at the right time.
Data Management. A single platform to collect, manage, and audit your data.
Reports & Dashboards. Realtime charts and formulas to report on your data.
Payments. ...
Integrations. - 61features of a local data basestores data in one central location.
allows data to be shared by many users.
provides user interfaces to work with the data.
creates backups.
controls who can access and edit the data. - 62DBMS (data base management )a DBMS is a software that allows you to create and use your own database, it creates tables and fields and allows you ro search and sort data.it can also handle security to prevent un-authorised access, and it allows different levels of access for different users
- 63SQLsql is the language used by a DBMS to actually create and search an data base, it has a data definition language (DDL) to set-up the tables, and it has a data manipulation language (DML) for updates and search queries
- 64presence checkensures data is entered into a field and not left blank.
- 65range checkused to ensure data falls between a set range.
- 66format checkused to ensure data is in the correct format
- 67check digitused to ensure the data received is the same as the data transmitted
- 68Threats to data
- 69how to protect data
- 70Threat to datalost or damaged during a system crash - especially one affecting the hard disk.
corrupted as a result of faulty disks, disk drives, or power failures.
lost by accidentally deleting or overwriting files.
lost or become corrupted by computer viruses. - 71opportunistone that is opportunistic or that practices opportunism a slick, shady, amoral opportunist who has only one desire: to get through life without a day of labor— Allan Ulrich Most burglars are opportunists.
- 72data protection act
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- FlashCards sobre internet flashcard, criado por Sajjad Ahmed em 07-12-2021.
- Criado por
- Sajjad Ahmed
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