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Flashcards do conjunto (20)
- 1what is the purpose of an NIC ?to allow a node (computer) to connect to and send data across a network.
- 2what is a router ?a router is a computer whose software and hardware are customised to move data between computer network.
- 3what is a hub?a hub is a devise that connects nodes (computers) together.
- 4what is a switch ?A device that connects nodes together.
- 5what is a wireless access point ?in computer networks, a wireless access point is a devise that allows people to connect devises on a wireless LAN to a wire-based network.
- 6what is a LAN ?A LAN covers a small area such as one site or building, eg a school or a college.
- 7what is a WAN ?A WAN covers a large geographical area. Most WANs are made from several LANs connected together.
- 8what is the internet ?The internet is a global network of computers. All computer devices (including PCs, laptops, games consoles and smartphones) that are connected to the internet form part of this network. Added together, there are billions of computers connected to the internet, all able to communicate with each other.
- 9what is the world wide web ?The internet is a huge network of computers all connected together. The world wide web (‘www’ or ‘web’ for short) is a collection of webpages found on this network of computers. Your web browser uses the internet to access the web.
- 10What is the purpose of a Modem?it connect our computers to the Internet. In this article, we look at these devices in detail, beginning with what is a computer modem and what is its purpose, what does "modem" stand for, and what are its parts.
- 11what is an ISP ?An Internet Service Provider (ISP) supplies you with access to the web, usually via home, mobile or satellite broadband connection. If you're searching for the best ISP supplying broadband in your area, we can help you compare thousands of deals and find the right provider for your home.
- 12What does HTTP stand for?HTTPS stands for Hypertext Transfer Protocol Secure, and instead of acting as its own application layer protocol, it uses separate protocols called SSL (Secure Sockets Layer) and TLS (Transport Layer Security).
- 13what is an URL ?URL is the abbreviation of Uniform Resource Locator and is defined as the global address of documents and other resources on the World Wide Web. To visit this website
- 14What is HTTPS and what is it used for?HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.
- 15What are the three different network topologies?it star and bus and ring
- 16What are the advantages / disadvantages of a Star topology?Image result for What are the advantages / disadvantages of a Star topology?
Star Topology: Advantages and Disadvantages. In Star topology, all the components of network are connected to the central device called “hub” which may be a hub, a router or a switch. ... So it can be said that every computer is indirectly connected to every other node by the help of “hub”. - 17What are the advantages / disadvantages of a Ring topology?Disadvantages of ring topology. All data being transferred over the network must pass through each workstation on the network, which can make it slower than a star topology. ... The hardware needed to connect each workstation to the network is more expensive than Ethernet cards and hubs/switches
- 18What are the advantages / disadvantages of a Bus topology?Alternatively referred to as a line topology, a bus topology is a network setup in which each computer and network device are connected to a single cable or backbone. The following sections contain both the advantages and disadvantages of using a bus topology with your devices.
- 19What is encryption ?Encryption is used to scramble information so that it can be sent safely without anyone else being able to read it. The information is encrypted with a password or key that is needed to read the information again. ... To read the message you need to know how many places each letter was moved (this is called the key)
- 20What is decryption?Decryption is the process of transforming data that has been rendered unreadable through encryption back to its unencrypted form. In decryption, the system extracts and converts the garbled data and transforms it to texts and images that are easily understandable not only by the reader but also by the system
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- FlashCards sobre Sem título, criado por Cadence McCarter em 06-10-2017.
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