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- 1What is a computer network?A computer network is a group of computer systems and other computing hardware devices that are linked together through communication channels.
- 2Describe a LANA LAN is a local area network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.
- 3Describe a WANA WAN is a wide area network which works in a large area
- 4What are the advantages of a computer network?Sharing devices such as printers saves money. Files can easily be shared between users.
- 5What 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. - 6What devices are needed to produce a LAN?Network Medium. Wired networks need cable
Cable Connectors
Power Supply
Hub/Switch/Router
Network Software - 7What is the purpose of a NIC?The NIC contains the electronic circuitry required to communicate using a wired connection or a wireless connection.
- 8What is the purpose of a Router?A router is considered a layer-3 device because its primary forwarding decision is based on the information in the layer-3 IP packet, specifically the destination IP address.
- 9What is the purpose hub?Hubs are devices commonly used to connect segments of a LAN. The hub contains multiple ports
- 10What 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.
- 11What is the purpose of a WAP?A wireless access point 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.
- 12What is the difference between a Hub and a Switch?Ethernet hubs, switches, and routers are all devices that let you connect one or more computers to other computers, networked devices, or even other networks.
- 13What is the Internet?The internet is a global network of computers that works much like the postal system, only at sub-second speeds
- 14What is the World Wide Web?The world wide web is a collection of webpages found on this network of computers. Your web browser uses the internet to access the web.
- 15What is the purpose of a Modem?Modems are mysterious devices (as is the case for all computer hardware) that connect our computers to the Internet.
- 16What is the purpose of an ISP?An Internet service provider (ISP) is an organisation that provides services accessing and using the Internet.
- 17What 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.
- 18What does HTTP stand for?HTTPS is "Hyper Text Transfer Protocol" with Secure Sockets Layer, another protocol primarily developed with secure, safe Internet transactions in mind.
- 19What is a URL?the address of a World Wide Web page.
- 20How 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. A URL is also made up of several parts.
- 21What are the three different network topologies?In a mesh network, devices are connected with many redundant interconnections between network nodes.
Star Topology. Star Topology: In a star network devices are connected to a central computer, called a hub. ...
Bus Topology. ...
Ring Topology. ...
Tree Topology. - 22What are the advantages / disadvantages of a Star topology?Disadvantages of a Star Topology. Requires more cable length than a linear topology. If the hub, switch, or concentrator fails, nodes attached are disabled. More expensive than linear bus topologies because of the cost of the hubs, etc.
- 23What 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 entire network will be impacted if one workstation shuts down.
- 24What 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 both have the advantages and disadvantages of using a bus topology with your devices.
- 25List 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, e.g locked away in a fireproof and waterproof safe - 26What 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.
- 27What is encryption?The process of converting information or data into a code, especially to prevent unauthorised access.
- 28What 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.
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- Karteikarten am Ohne Titel, erstellt von Amani Khayer am 04/12/2017.
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