TEST 4 ANSWERS

ANALYZING & MANAGING INFORMATION

TEST 4                                                                                 MARKS

1.   Define the meaning of the Internet                                      1

A system of inter-connected computer networks that
function by using a series of communication protocols

2.   Define the meaning of the World Wide Web                        1

A set of standards for displaying and distributing
hypermedia documents over the internet.

3.   What is meant by ‘an Access Channel’?                             2
Give some examples

A means by which consumers may acquire goods
and services using technology

Telephone, Computer, Mobile

4.   (1) Personal computer and telephones                                3
(2) Tablets and mobile phones and
(3) Televisions
Each are connected by different types of networks.
Name the correct type of network in each case

(1)  telephone network

(2)  wireless network

(3)  broadband network

5.    What do the following acronyms mean and what                2
purpose does each serve?

(1). LAN

      Local Area Network

      A communication network in which the nodes are
      located relatively close together and use either
      cables or wireless to communicate


(2)  WAN

      Wide Area Network

      A type of communication network in which nodes
      are geographically remote and use cables,
      microwaves and satellite to communicate

6.   What Is the difference between WiFi and WiMax?              4

WiFi is a nickname of IEEE 802.11b wireless standard
It provides short range communications using LANs

WiMax is short for Worldwide Interperability for
Microwavr Access
It provides long range communications using WANs

7.   Explain the concept of ‘packet-switching’                            2

P-S is the process of breaking up a digital message
(for speed and security reasons) into packets that are
sent by a router on different routes over a network and
then reassembled at the receiving destination   

8.   What are the 4 layers of TCP/IP?                                        2

1. Application
2. Transport
3. Internet Protocol
4. Network

9.   What does HTTP mean and what are its three                    2      
 organizational layers?

Hypertext Transfer Protocol

Linear, Hierarchical and Network

10. Construct a viable IP address and describe the                 2
 criteria for construction                           

Example:  126.203.97.54

There must be 4 series of numbers (between 0-255),
each divided by a point

11.  What does EDI stand for?                                                 3
  What does it do?
  And what competition does it have?      

Electronic Data Interchange

It is a standard list of rules and codes that enable
business documents, such as purchase orders
and invoices, to be translated into formats that can
be sent and received electronically in a form that
all suppliers and customers can understand>

XML

12.  What purpose does a router serve?                                  1

It enables messages to be sent between two devices
where the IP addresses of the sender and receiver
are not on the same network


 

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