III. Put the sentences into the right order and read the text

1. typically span /Local area networks (LANs)/ a single home, /school, /or small office building.

2. states,/ Wide area networks /(WANs), /reach across cities, / or even across the world.

3. largest /The Internet/ public/ is the world's/ WAN.

4. can be either/ Transmission / physical/ media / or wireless.

5. is/The best way / to/ effectively/ to protect data/ control /the access to it.

6. the responsibility/ Generally,/ this protection is/ and security personnel./ of the network administrators

7. they may obtain/ If unauthorized persons/ to data,/ gain access/ valuable information/ or trade secrets.

8. into computer systems/ Hackers /are people / to steal services/ who break/ and information.

9. communications/ A modem a type of / / is/ device.

10. and forwarding /A hub/ is/ the incoming/ a device that controls/ of data.

11. directs traffic/ A router/ or on multiple/ on the Internet / connected networks.

IV. As with any technology, you should consider the disadvantages of using a network along with the benefits. For instance, data insecurity and the vulnerability to unauthorized access are primary weaknesses of many networks. The security of a computer network is challenged every day by equipment malfunctions, system failures, computer hackers, and virus attacks. Find information given below, choose the title for every paragraph from given below and prepare an oral report in which evaluate the risk of networked computing and disadvantages of networks.