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Networks
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- 1What is a computer network?A Computer Network is a digital telecommunications network which allows nodes to share resources.
- 2What are the advantages of a computer network?The advantages of a computer network are: Resource sharing – using network-connected peripheral devices like printers, scanners and copiers, or sharing software between multiple users, saves money.
- 3What devices are needed to produce a LAN?Network Adapter. A computer needs a network adapter to connect to a network. ...
Network Medium. Wired networks need cable. ...
Cable Connectors. ...
Power Supply. ...
Hub/Switch/Router. ...
Network Software. - 4What is the purpose of a NIC?The NIC contains the electronic circuitry required to communicate using a wired connection (e.g., Ethernet) or a wireless connection (e.g., WiFi).
- 5What is the purpose of a Router?The main purpose of a router is to connect multiple networks and forward packets destined either for its own networks or other networks.
- 6What is the purpose of a Hub?A hub, also called a network hub, is a common connection point for devices in a network
- 7What is the purpose of a Switch?The basic function that any switch is supposed to perform is to receive information from any source connected to it and dispatch that information to the appropriate destination only.
- 8What is the purpose of a WAP?A wireless access point (WAP) is a hardware device or configured node on a local area network (LAN) that allows wireless capable devices and wired networks to connect through a wireless standard, including Wi-Fi or Bluetooth.
- 9What is the difference between a Hub and a Switch?There are three main devices that work to connect one computer to another computer. A network hub, switch, and router can all perform this function. It can sometimes be confusing when trying to figure out what device is currently being used on a computer network, without knowing what each device does.
- 10What is the Internet?a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardised communication protocols.
- 11What is the World Wide Web?an information system on the Internet which allows documents to be connected to other documents by hypertext links, enabling the user to search for information by moving from one document to another.
- 12What is the purpose of a Modem?Modem stands for MOdulator/DEModulator. A modem converts digital signals generated by the computer into analogue signals which can be transmitted over a telephone or cable line and transforms incoming analogue signals into their digital equivalents.
- 13What are the disadvantages of a computer network?Purchasing the network cabling and file servers can be expensive.
Managing a large network is complicated, requires training and a network manager usually needs to be employed. - 14What is the purpose of an ISP?An Internet service provider (ISP) is an organisation that provides services accessing and using the Internet.
- 15What is an IP address?a unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a network.
- 16What 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)
- 17What is a URL?the address of a World Wide Web page.
- 18How is a URL constructed?A URL can be thought of as the "address" of a web page and is sometimes referred to informally as a "web address."
- 19What are the three different network topologies?Mesh Topology. Mesh Topology: In a mesh network, devices are connected with many redundant interconnections between network nodes.
- 20What 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.
- 21What are the advantages / disadvantages of a 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.
- 22What 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.
- 23List examples of data that need to be kept securemaking regular backups of files (backup copies should be stored in fireproof safes or in another building)
protecting yourself against viruses by running anti-virus software
using a system of passwords so that access to data is restricted
safe storage of important files stored on removable disks, eg locked away in a fireproof and waterproof safe
allowing only authorised staff into certain computer areas, eg by controlling entry to these areas by means of ID cards or magnetic swipe cards - 24What 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.
- 25What is encryption?he process of converting information or data into a code, especially to prevent unauthorized access.
- 26What is decryption?Decryption is the process of taking encoded or encrypted text or other data and converting it back into text that you or the computer can read and understand. This term could be used to describe a method of un-encrypting the data manually or with un-encrypting the data using the proper codes or keys.
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- Fichas sobre Networks, creado por Harry Webster el 04/12/2017.
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- Harry Webster
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