2. 3.1.1 Basic concepts of Networks and Communications
3.1.5 Networks Topologies
3.1.5.1 State three types of network topologies : Bus, Ring and Star
3.1.5.2 Differentiate between the three types of network topology
BUS TOPOLOGY
DESCRIPTION Found in LAN sometimes have more than one server
and sometimes do not need server.
DEPENDENCE If one nodes fail, it’s not effect network
Easy implementation
ADVANTAGES Failure of nodes does not effect the entire LAN
No disruption to the network when connecting or
removing device
If the backbone (wired) fails, entire network will
extended.
DISADVANTAGE Network speed decrease when number of PC
increase difficult troubleshooting when one nodes
fails

3. RING TOPOLOGY
DESCRIPTION Found in LAN, server may exist but not connect to all
nodes in the network
DEPENDENCE If one node fail, the network will fail to function
Troubleshooting is easy when one of the nodes fails
ADVANTAGES Repair or removing nodes, the network still
functioning
Difficult implementation failure of one nodes will
failure the entire network
DISADVANTAGE Connecting and removing device difficult
Network speed decrease when number of PC
increase

4. STAR TOPOLOGY
DESCRIPTION Found in LAN. Must have a host that can be server,
hub or router
DEPENDENCE If one fail, network can still function as long the host
still working, if the host not working network will fail
to function
Easy implementation failure of nodes does not effect
ADVANTAGES the entire LAN
No disruption to the network when connecting or
removing device
Troubleshooting is easy when the host fails. Simply
repair or replace the host
Failure of host will effects the entire network
Network speed decrease when number of PC
DISADVANTAGE increase
Host must be installed to control the network

5. 3.1.1 Basic concepts of Networks and Communications
3.1.6 Protocols
3.1.6.1 Define Transmission Control Protocol/Internet Protocol (TCP/IP)
as a protocol to facilitate communication over computer network
Is internet communication protocol
DEFINITION Standard that set rules for PC must follow in
communicating with each other on a network
Some refer to TCP/IP as internet protocol suite
Protocol that set of communication rules between
TRANSMISSION
CONTROL computers
PROTOCOL Establishes connection between 2 PC, protect agains
(TCP)
data loss and data corruption
Responsible for breaking the data into packets before the
are sent than assemble the packets when they reach a
destination
Protocol that transfer data form node to node (PC to PC)
INTERNET IP take care of delivering data packets between 2 PC
PROTOCOL Responsible for sending the packets from sender to
(IP)
receiver

6. 3.1.1 Basic concepts of Networks and Communications
3.1.7 Internet, Intranet and Extranet.
3.1.7.1 Describe the types of network communications technology
The internet, or the net is the
worldwide, publicly accessible
system of interconnected computer
networks that transmit data by
packet switching using the
standard Internet Protocol (IP). It
consist of millions of smaller
business, academic, domestic and
government networks, which
together carry various information
INTERNET and services, such as electronic
mail, online chat, and the
interlinked web pages and other
documents of the world wide web.
Internet is one of the uses of
communication, through the
internet, society has access to
global information and instant
communication.
An intranet (intra means within) is
an internal network that uses
internet technologies and it is a
small version of the internet that
exists within an organization. An
intranet is a private computer
network that uses internet
protocols, network connectivity
and possibly the public
telecommunication system to
INTRANET securely share part of an
organizations information or
operation with it’s employees.
Intranet generally make company
information accessible to
employees and facilitate working
in groups. Simple intranet
applications include electronic
publishing of organizational
materials such as telephone
directories, event calendars and
job postings.

7. Extranet is a private network that
uses internet protocols, network
connectivity, and possibly the
public telecommunication system
to securely share part of a
business information or operations
with suppliers, vendors, partners,
EXTRANET customers or other businesses.
Package shipping companies, for
example, allow customers to
access their network to print air
bills, schedule pickups, and even
track shipped packages as the
packages travel to their
destinations.

9. SCORE
Network Topology

10. SCORE
Network Topology
1. A bus refers to the main physical 6. In a bus topology, troubleshooting
pathway or central cable where all is difficult when one of the nodes fails.
other devices are connected to it.
A. TRUE
A. TRUE
B. FALSE
B. FALSE
7. A bus network must have a
2. If the backbone fails, the network common backbone (the central cable)
can still function. to connect all devices.
A. TRUE A. TRUE
B. FALSE B. FALSE
3. A bus topology consists of a double 8. In communications technology, a
central cable to which all computers bus network is like as a common
and other devices connect. “highway” in which data is
transmitted.
A. TRUE
A. TRUE
B. FALSE
B. FALSE
4. One of the advantages of the bus
topology is new devices can be added 9. Bus topology and bus network are
to the backbone or to the existing two different things.
nodes.
A. TRUE
A. TRUE
B. FALSE
B. FALSE
10. In a bus topology, failure of a
5. Bus networks are very common in node will affect the entire LAN.
Wide Area Networks (WAN).
A. TRUE
A. TRUE
B. FALSE
B. FALSE

11. Ring Topology SCORE
1. A ring topology consists of a single A. TRUE
central cable to which all computers
and other devices connect. B. FALSE
A. TRUE
B. FALSE 7. If one of the nodes in a ring
network with backbone fails, the
network can still function as long as
the backbone is working.
2. A server may exist in a ring
network, but it will not connect to all A. TRUE
the nodes in the network.
B. FALSE
A. TRUE
B. FALSE
8. In a ring network, a failing node
does not affect the entire LAN.
3. A ring network can be found in A. TRUE
Wide Area Networks.
B. FALSE
A. TRUE
B. FALSE
9. If a ring network has a ring-form
backbone, then all nodes will connect
to the backbone.
4. A ring network does not have a
common backbone. A. TRUE
A. TRUE B. FALSE
B. FALSE
10. In a ring network, troubleshooting
is difficult when one of the nodes fail.
5. Ring topology is also known as ring
network. A. TRUE
A. TRUE B. FALSE
B. FALSE
6. If one of the nodes in a ring
network with backbone fails, the
network will fail to function.

12. SCORE
Star Topology
1. A star network is found in a 7. __________________is difficult
________________________setting. when one of the nodes fails.
2. In the early days of computer 8. A star topology consists of a
_______________,all computers were _______________which acts as the
connected to a centralised mainframe centre and all nodes connect to the
computer. host.
3. A star topology is also known 9. In a star network, every
as___________________ ________________will not connect to
the neighbouring nodes.
4. The idea of a
________________computer is where
the basic concept of a star topology
comes from.
5. Network speed
____________________when the
number of nodes increases.
6. If one of the nodes
________________ the star network
can still function as long as the host is
working.

13. SCORE
Differences of Network Topology
1. Each topology influences the capabilities of the hardware in order to manage the
flow of information. True False
2. Ring topology has no limit to install as many numbers of nodes when extending a
network. True False
3. Star topology has an average capacity in adding and removing nodes.
True False
4. Star topology has it own host.
True False
5. Ring topology does not have connection between each node.
True False
6. Bus topology has a central host and all nodes connect to it.
True False
7. In a ring topology, all computers and other devices are connected in a circle.
True False
8. Star topology limits installation of many numbers of nodes when extending a
network.
True False
9. Bus network has no difficulties in troubleshooting.
True False
10. Bus topology can install many numbers of nodes when extending a network.
True False

14. SCORE
Introduction to TCP/IP
1. IP is the protocol that transfers data from node to _____________________.
2. TCP is responsible for breaking the data into_____________ before they are
sent, and assemble them when they reach a destination.
3. IP is responsible for sending the packets from sender to __________________.
4. Some refer TCP/IP as the ________________________.
5. TCP stands for _______________________
6. IP takes care of delivering data packets between two ___________________
7. TCP/IP is the internet communication_________________________
8. IP stands for ____________________
9. TCP/IP is a _________________that sets the rules computers must follow in
communicating with each other on a network.
10. TCP establishes connection between two computers, protects against data loss
and
_________________ corruption.

15. SCORE
Types of Network Communication Technology
1. An ________ __ can be viewed as part of a company's Intranet that is extended to users
outside the company.
Answer:
2. It has a Web server, supports multimedia Web pages coded in HTML and is accessible via
a Web browser such as Microsoft Internet Explorer or Netscape Navigator.
Answer:
3. It consists of millions of smaller business, academic, domestic and government networks,
which together carry various information and services, such as electronic mail, online chat.
It also carries interlinked Web pages and other documents of the World Wide Web.
Answer:
4. Package shipping companies, for example, allows customers to access their network to
print air bills, schedule pickups, and even track shipped packages as the packages travel to
their destinations.
Answer:
5. Through the society has access to global information and instant communications
Answer:
6. Sometimes the term refers only to the most visible service, the internal website.
Answer:
7. It has a Web server, supports multimedia Web pages coded in HTML and is accessible via
a Web browser such as Microsoft Internet Explorer or Netscape Navigator.
Answer:
1. In intranet, ______________and other Internet protocols are commonly used as well,
especially FTP and email.
2. The same concepts and technologies of the Internet such as clients and servers running
on the Internet protocol suite are used to build an __________________
3. Sometimes a company uses an ,________________which allows customers or suppliers
to access part of its network.
4. Contrary to some common usage, the Internet and the ________________are not
synonymous.
5. Intranet has a Web server, supports multimedia Web pages coded in HTML and is
accessible via a _________________ such as Microsoft Internet Explorer or Netscape
Navigator.

16. SCORE
Internet
1. Internet is a global network connecting 6. An ISP can either be a
millions of computers. telecommunication company or any other
A. TRUE organization specialising in providing
B. FALSE access to Internet services.
A. TRUE
2. There is only one category of Internet B. FALSE
connection and this is called broadband.
A. TRUE 7. The Internet is the world’s largest
B. FALSE computer network connecting millions of
computers
3. Some of the many usages of the worldwide.
Internet are entertainment, commerce A. TRUE
and education. B. FALSE
A. TRUE
B. FALSE 8. Internet service can only be provided
by a telephone company.
4. Internet transmits data by using A. TRUE
Internet Protocol (IP). B. FALSE
A. TRUE
B. FALSE 9. Currently, Malaysia has four telephony
companies providing Internet services.
5. Internet connection is divided into two A. TRUE
categories; dial-up and Streamyx. B. FALSE
A. TRUE
B. FALSE

17. SCORE
Intranet
6. The Internet connects networks
1. Intranet is an internal network within worldwide, while intranet works within a
the organisation. particular organisation.
True False True False
2. Intranet can be accessed by other 7. Intranets include services like email,
computers outside an organisation with company information, employee
the use of login names and passwords. handbook, company events and calendars
True False as well as job postings.
True False
3. Intranet has its own firewall to protect
from intruders outside an organisation 8. Intranets do not support groupware
from accessing the company information applications.
or data. True False True False
4. Intranet can be accessed without the 9. If Ali is in Jakarta on a business trip, he
use of user ID or login name and can still access company information by
password.. going through his company’s website,
True False entering his user ID or login name and
password.
5. Intranet can connect two branches of an True False
organisation even though they are located
at two different places. 10. With intranet, meetings and
True False discussions can be carried out without
having to physically meet at a meeting
room. True False

18. SCORE
Extranet
1. Only __________ or authorised users can navigate or access an extranet.
2. Through extranet, users can share product __________ exclusively with wholesalers or
those "in the trade”.
3. News of __________ interest can be shared privately with partner companies using
extranet.
4. __________ with other companies on joint development efforts can be done via extranet.
5. __________ can access the Internet while extranet is only limited to defined sets of
customers, suppliers or partners.
6. Extranet is within a firewall while the __________ might be with or without a firewall.