Flashcards
computing
Flashcards do conjunto (30)
- 1What are the disadvantages of Star Topology?The disadvantage of Star Topology is that if the central server goes down then the entire network goes down. Also, each added node requires more cabling.
- 2What are the advantages of Star Topology?The advantages of Star Topology is that it's cheap, reliable, strong and it's easy to add nodes. Also, if one cable breaks the network is fine.
- 3What are the disadvantages of Bus Topology?The disadvantages of Bus Topology are that data collisions can occur in larger networks, the faulty bus can disrupt the network, It's harder to add a new node as it affects the network. If one computer stops working then the bus is affected.
- 4What are the advantages of Bus Topology?The advantages are that it's cheap, easy to set up and requires minimal cabling.
- 5What are the advantages of a mesh topology?The advantages are that it's cheap and easy to set up.
- 6What are the disadvantages of a mesh topology?The disadvantages mean that data has to go through each computer before reaching its destination, adding devices disrupts the network, if any cable fails then the entire network goes down.
- 7What is social engineering?Human manipulation in order to gain ones trust.
- 8Give an example of social engineering.Phishing - The ability of obtaining sensitive information by disguising as a message, email, link and posing as a trusted source.
- 9What is SSD? Give an example.Flash Memory that uses a grid of electrical cells to retrieve and send data. Grids are separated into pages where data is stored. Clumps of pages are called blocks.
- 10Advantages of SSD?It's non-volatile, has faster access time, robust, less power consumption, small, less heat dissipation and is unaffected by magnetism.
- 11Disadvantages of SSD?Low capacity, high cost per GB, limited number of writes, becomes slow over time.
- 12What is optical storage? Give an example.CD, Removable disk that reads and writes data.
- 13Advantages of Optical Storage.Cheap, lightweight, portable, robust.
- 14Disadvantages of Optical Storage.Slow access times.
- 15Magnetic Storage, what is it? Give an example.HDD, Stores data using magnetic fields and has a read and write head close to the platter.
- 16Advantages of Magnetic Storage?Cheap, large capacity.
- 17Disadvantages of Magnetic Storage?Slow access times, fragile, not good for mobile.
- 18What are the storage Units, in order?Bit, Nibble, Byte, Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte,
- 19What does the DNS do?It translates web names into numbers (IP)
- 20How does the DNS work?1) After searching up a website the URL.there is a root. 2) The IP then moves on to ask the resolving name server website about the URL and stores the info in cache and moves on to the root name server. 3) The root name server then passes it onto the TLD name server and finally passes onto the authoritative name server.
- 21What does a website host do?It is a company that provides software, security, support, and bandwidth.
- 22What things must you consider before starting your own website?Budget, accessibility, privacy, and security.
- 23What are the dangers of Wi-Fi networks?Notorious for attackers, spy on browsing, stealing encryption key, man-in-the-middle attack..
- 24What does the NOT gate look like?-
- 25What does the AND gate look like?.
- 26What does the OR gate look like?.
- 27What is lossless compression?Compression that retains data.
- 28What is lossy compression?Compression that loses unnecessary data.
- 29What is a protocol?A set of rules.
- 30What is a web protocol?How a client and server talk. For example, HTTP (Hyper Text Transfer Protocol) sends a message 'GET' from the client to the server.
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- FlashCards sobre computing, criado por Megan Foster em 25-11-2018.
- Criado por
- Megan Foster
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