5. Networks

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Across
  1. 2. Used by mail clients to manage remote mail boxes and retrieve email from a mail server.
  2. 5. Part of the Internet Protocol suite used by programs running on different computers on a network. UDP is used to send short messages called datagrams but overall, it is an unreliable, connectionless protocol.
  3. 6. Used for sending files between computers, usually on a wide area network.
  4. 7. Small geographic area. All the hardware is owned by the organisation using it. Wired with UTP cable, fibre optic cable or wireless using routers and Wi-Fi access points.
  5. 8. This layer sets up the communication between the two hosts and they agree settings such as ‘language’ and size of packets.
  6. 9. An arrangement in a local area network in which each node (workstation or other device) is connected to a main cable or link called the bus.
  7. 13. Any computer network which predominantly connects its hardware via Wi-Fi thus eliminating much of the need for physical caballing.
  8. 15. A standard for networking local area networks using protocols. Frames are used to transmit data. A frame contains the source and destination address, the data and error checking bits. Uses twisted pair and fibre optic cables. A switch connects computers together.
  9. 17. provides an error free transmission between two routers.
  10. 18. routes packets across a wide area network.
  11. 19. The arrangement of the elements of a communication network.
  12. 20. This is where the network hardware such as the NIC (network interface card) is located. OS device drivers also sit here.
  13. 21. Sends email to an email server.
  14. 22. Large geographic area. Infrastructure is hired from telecommunication companies who own and manage it. Connected with telephone lines, fibre optic cables or satellite links.
Down
  1. 1. Any computer network which predominantly connects its hardware via the user of physical cables e.g. Copper, Fibre optic etc.
  2. 2. Addresses and packages data for transmission. Routes the packets across the network.
  3. 3. A computer network for interconnecting devices cantered on an individual person's workspace, most typically uses Bluetooth technology for this.
  4. 4. Encryption and authentication for requesting and delivering HTML web pages. Used when sensitive form or database data needs to be transferred. e.g. passwords and bank account details.
  5. 10. Wireless connection to a network. Requires a wireless access point or router. Data is sent on a specific frequency. Each frequency is called a channel.
  6. 11. A client-server method of requesting and delivering HTML web pages. Used when the information on a web page is not sensitive or personal.
  7. 12. A set of rules that allow two devices to communicate.
  8. 14. Computers connected to a central switch. If one computer fails no others are affected. If the switch fails all connections are affected.
  9. 16. This is where the network applications, such as web browsers or email programs, operate.