Network+Test+Answers

=Networking Test=
 * 1) What do the terms LAN and WAN stand for? (2)

Local Area Network Wide Area Network


 * 1) A school has a LAN.
 * Give two differences between a LAN and WAN. (4)


 * LAN is located in 1 building. WAN operates over a space larger than 1 building.
 * LAN uses cables or wifi to make network connections.
 * WAN uses telecommunications such as satellite and underground fibre optic cables to make network connections.
 * LAN can achieve network speeds of 1 gbs point to point.
 * WAN network speeds are typically a few mbps.


 * Explain three advantages of having school computers connected to a LAN as opposed to having the same number of stand-alone machines. (6)


 * Save cost sharing hardware
 * Share data
 * Share security
 * Share Internet connection


 * Explain two disadvantages of having the school computers connected to a LAN as opposed to having the same number of stand-alone machines. (4)


 * Networks are expensive to setup
 * Networks are difficult to setup
 * If 1 network computer gets infected by a virus or spyware then the others will also get infected
 * 1) Explain briefly what is meant by the following terms: (10)
 * File server is a network computer used to share data over a network so a user has access to their files from any computer on that network.
 * NIC is a network interface card that has an Ethernet port and or wifi/ modem to allow the computer to connect to a network.
 * Switch is a hardware device that connects multiple computers on a network. A switch is able to route messages and data so it goes to the recipient without the other computers on the network being able to see the data being sent.
 * Hub is a hardware device that connects multiple computers on a network. Data sent via a hub can be seen by all the computers on the network.
 * Modem converts digital data into an analogue signal so it can be sent over the internet using a telephone call. It converts the signal back into digital data when it arrives at the recipient’s computer.
 * 1) Explain two security threats to a network. (4)

· Unauthorised access - hacking · Spyware · Virus · Worm · Trojan horse · Distributed Denial of Service Attack


 * Describe two benefits that can be gained by a company setting up its own web site. (4)

Intranet is a private network that uses webpages viewed on a browser that are only accessible to people within the building, LAN or organization.
 * Increased access to customers through advertising and information
 * Feedback from customers from comments and blogs
 * Online shopping – E-commerce
 * Opportunity to add multimedia message through online video, audio and photographs
 * Describe what is meant by an Intranet. (2)

Describe two benefits that could be gained by a company by setting up an intranet. (4)

 i. Give two benefits of using broadband compared with modems for connecting to the Internet. (4) Broadband offers faster connection than dialup modem. Broadband lets you make phonecalls at the same time as using the Internet. Broadband offers a flat rate fee for always being connected to the Internet rather than charging per minute.
 * Share information with employees
 * Intranets are private, members only
 * 1) A business uses computers connected to the Internet.
 * The company used to use modems to connect to the Internet. Now it uses broadband.

Explain the difference between uploading and downloading data. (2) Uploading is putting data on the Internet. Downloading is when you move data from the Internet to your computer. >> Internet access >> Email provision and address >> Web hosting space >> Internet security – Email scanning for spam and viruses  i. Address books are lists of contact details, including Email addresses so senders do not have to remember Email addresses  ii. Mailing lists are used to send an E-mail to many recipients at once by sending the message to the group. Eg 11 IGCSE ICT  iii. File attachment is used to put a document in an E-mail message. Eg image, wordprocessing file, slideshow file  iv. File compression is used to reduce file sizes and put several files into 1 file archive so folders can be E-mailed as an attachment.
 * Describe three services provided by an ISP (6)
 * Explain how each of the following features of E-mail could be used by the business: (8)

E-mail allows messages to be sent and replied to within a few minutes whereas letters require several days to receive replies. E-mail lets you send messages to others even if they are not connected to the Internet when you send the Email to them. Phonecalls require the other person to be available for a call. E-mail messages are free once you are connected to the Internet. Letters need to be paid for with stamps. Phonecalls needs to be paid for.
 * Explain three advantages of the business using E-mail rather than letter, fax or telephone to communicate with its customers. (6)