1. Introduction to Telecommunications, Network and Network Topology I will be able to... Mrs. Morton 8 th Grade Know Network Terminology Know the 2 Main Types of Networks Network Advantages and Disadvantages Identify Different Types of Network Topologies Identify Network Security Identify the 3 Main Types of Networ k Securities

2. 23 5 1 18 5 12 3 1 18 14 9 14 7 1 2 15 21 20 3 15 13 16 21 20 5 18, 14 5 20 23 15 18 11 1 14 4 19 5 3 21 18 9 20 25 Using the key, work out the hidden message (code) A = 1 B = 2 C = 3 D = 4 E = 5 F = 6 G = 7 H = 8 I = 9 J = 10 K = 11 L = 12 M = 13 N = 14 O = 15 P = 16 Q = 17 R = 18 S = 19 T = 20 U = 21 V = 22 W = 23 X = 24 Y = 25 Z = 26 What are we learning about? Place Your Answer Here:

3. A Computer network is a number of computers linked together to allow them to share resources. Network computers can share hardware, software, and data.

4. Most computer networks have at least one server. For Example: File Storage and Email. A Server is a powerful computer that provides one or more services to a network and its’s users.

5. There are Two Types of Network that we are Discussing Today. A LAN (LOCAL AREA NETWORK) covers a small area, such as 1 site or 1 building. Like a School or College. (Local Area Network)

6. There are Two Types of Network that we are Discussing Today. A WAN (WIDE AREA NETWORK) covers a LARGE geographical area. Most WANs are made from several LANs, Connected together. (Wide Area Network)

7. School Classroom Banks (Cash Machines) Internet Leased Lines (Verizon, Comcast) College/Universities IS IT A LAN OR A WAN? Indicate by Typing, Lan or Wan in Column 2 Below?

8. An Internet is a WAN. A network of bank cash dispensers is a WAN. A school and college network is usually a LANs. LANs are often connected to WANs, for example school network could be connected to the Internet. WANs can be connected together using the Internet, Leased lines or Satellite links.

9. Advantages & Disadvantages Networks Advantages Sharing devices such as printers saves money. Site (Software) licenses are likely to be cheaper buying several standalone computer licenses. Files can easily be shared between users. Network users can communicate by email and instant messenger. Security is good – users cannot see other users’ files unlike on stand-alone machines. Data is easy to backup as all the data is stored on the file server.

10. What is a Leased Line Used For? Business used lines to…. Connect to the Internet Link PCs and servers in different corporate offices Carry phone calls Enable staff to connect to their work PCs from home Further Information: Other Computer Networks HAN= Home Area Network MAN= Metropolitan area Network PAN= Personal Area Network WLAN= Wireless Local Area Network Peer to Peer= Simplest Network (No Servers Connected)

11. Move the Correct Pictures Above, Beside Correct Definitions: BELOW Sharing devices such as printers saves money. Site (Software) licenses are likely to be cheaper buying several standalone computer licenses. Files can easily be shared between users. Network users can communicate by email and instant messenger. Security is good – users cannot see other users’ files unlike on stand-alone machines. Data is easy to backup as all the data is stored on the file server.

12. Advantages & Disadvantages Networks Disadvantages 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. If the file server breaks down, the files on the server become inaccessible. Email might still work if it is on a separate server. The computers can still be used but would be isolated. Viruses can spread to other computers throughout a computer network. There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, e.g. a firewall.

13. Disadvantages Move the Correct Pictures Above, Beside the Correct Definitions: BELOW 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. If the file server breaks down, the files on the server become inaccessible. Email might still work if it is on a separate server. The computers can still be used but would be isolated. Viruses can spread to other computers throughout a computer network. There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, e.g. a firewall.

14. A topology is the physical configuration of a network that determines how the network's computers are connected. The 3 Main Topologies that we will discuss are: Bus Star Ring NETWORK TOPOLOGY (www.computerhope.com)

15. 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. Advantages of bus topology It works well when you have a small network. Easiest network topology for connecting computers or peripherals in a linear fashion. Requires less cable length than a star topology. Disadvantages of bus topology Difficult to identify the problems if the whole network goes down. It can be hard to troubleshoot individual device issues. Not great for large networks. Terminators are required for both ends of the main cable. Additional devices slow the network down. If a main cable is damaged, the network fails or splits into two. (www.computerhope.com)

16. STAR TOPOLOGY? Alternatively referred to as star network, a star topology is one of the most common network setups. In this configuration, every node connects to a central network device, like a hub, switch, or computer. The central network device acts as a server and the peripheral devices act as clients. Advantages of star topology Centralized management of the network, through the use of the central computer, hub, or switch. Easy to add another computer to the network. If one computer on the network fails, the rest of the network continues to function normally. Disadvantages of star topology Can have a higher cost to implement, especially when using a switch or router as the central network device. The central network device determines the performance and number of nodes the network can handle. If the central computer, hub, or switch fails, the entire network goes down and all computers are disconnected from the network. (www.computerhope.com)

17. RING TOPOLOGY? Alternatively referred to as a ring network, ring topology is a computer network configuration where the devices are connected to each other in a circular shape. Each packet is sent around the ring until it reaches its final destination. Advantages of ring topology All data flows in one direction, reducing the chance of packet collisions. A network server is not needed to control network connectivity between each workstation. Data can transfer between workstations at high speeds. Additional workstations can be added without impacting performance of the network. 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. The hardware needed to connect each workstation to the network is more expensive than Ethernet cards and hubs/switches. (www.computerhope.com)

18. Which is a BUS, STAR OR RING TOPOLOGY? Drag and Label the topologies with the Proper Keyword. BUS TopologySTAR Topology RING Topology

19. Network & Network Topologies View This Telecommunication Video and paste YOUR results of the QUIZ on next page. (Right click Picture to open the link and then scroll down to see the video.) http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networks_act.shtml

20. Network & Network Topologies Use the Snipping Tool and Paste Your Results of the QUIZ Below: (Quiz can be found at the end of the video. ) http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networks_act.shtml

21. Email Host Hub Modem Protocol Node WAN Computer Network 1. A device that uses its ports to connect devices like computers and printers together. A device that allows computers to communicate over Telephone lines Computers connected together for the purpose of sharing information and resources. An exchange of electronic messages between computers that are connected to the Internet or some other computer network. How data is formatted transmitted and received in a network. Any part of the network that gives data out such as a server. A device physically connected in a network such as computers, server, printers, etc.) Wide Area Network, the largest type of network in terms of Geographic area. 2. 3. 4. 5. 6. 7. 8. Computer Networking Vocabulary Use the Word Bank to select the correct word for each definition below. You may use the Dictionary.

22. 1. 2. 3. 4. 5. 6. 7. 8. Computer Networking Vocabulary a) A communications method for transferring data between computers on the Internet. b) The amount of data that can be transferred over a network in a certain amount of time. c) Metropolitan Area Network, a network that covers a larger geographic area such as a city. d) Any part of the network that receives data such as a workstation. e) A computer networking device that connects network segments. f) A card installed in a computer that allows you to connect to a network g) Local area network, a network that covers a relatively small geographic area such as a building or school campus. h) Part of a computer system that is designed to block unauthorized access Switch Client LAN Bandwidth MAN Network Interface Card Firewall File Transfer Protocol Matching Questions - Write the correct letter by the word that best matches the definition.

23. Type 3 things you have learnt about Telecommunications and Networks on each of the Pads of Paper below. Telecommunications I learned that… Telecommunications I learned that… Telecommunications I learned that…. When this packet has been completed, save and send to the Teacher’s Drop Box.