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3.0 INTERNET TECHNOLOGY

3.1.1 network topology complete

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Page 1: 3.1.1 network topology complete

3.0 INTERNET TECHNOLOGY

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3.0 Internet

Technology3.1

Network Basic

3.2 The

Internet

3.1.1 Network Topology

3.1.2 Classification

of network

3.2.1 Overview the

internet

3.2.1.1 Evolution of the internet

3.4Types of Websites

3.3Internet Services

3.2.2 World Wide

Web3.2.2.1

Web Browser

3.2.2.3 Web page navigation

3.5 Netiquette

3.2.1.2 The internet connection

3.2.1.4 The Internet

Address

3.2.1.3 Internet Service Provider

3.2.2.4Information searching

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LEARNING OUTCOMES

At the end of this topic, students should be able to:

1) Explain types of network topology

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What Is a Network?

A network is a collection of computers and devices connected together via

communications devices and transmission media

Shelly Cashman

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A network topology refers to the layout of the computers and devices in a communications network.

What Is a Network Topology?

Shelly Cashman

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It refers to both the physical and logical layout of a network.

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Types of network topology.Three commonly used network topologies are:

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BUS NETWORK TOPOLOGY

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Bus Network Topology

A bus network consists of a single central cable (backbone), to which all computers and other nodes connect.

Backbone

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Bus Network Topology

Advantages:

1. Inexpensive and easy to install.

2. Computers and other nodes can be attached and detached at any point on the bus without disturbing the rest of the network.

3. Failure of one node usually does not affect the rest of the bus network.

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Bus Network Topology

Disadvantages:

1. Because all systems on the network connect to a single cable or backbone, a break in the cable will prevent all systems from accessing the network.

2. It is difficult to identify the problem if the entire network shut down.

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STAR NETWORK TOPOLOGY

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Star Network Topology

All the computers and other nodes on the network connect to a central device, thus forming a star.

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Star Network Topology

Two types of nodes that provide a common central connection point to all the other nodes on the network are a hub and a switch.

Hub / Switch

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Star Network Topology

The device that provides a common central connection point for other devices on a network.

All data that transfers from one node to another passes through the hub or switch.

The hub takes a signal that comes from any node and passes it along to all the other nodes in the network.

Hub / Switch

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Star Network Topology

Advantages:

1. If one node fails, only that node is affected.

2. Nodes can be added to or removed from network with little or no disruption.

3. Easy to troubleshoot and isolate problem.

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Star Network Topology

Disadvantages:

1. If the hub or switch fails, the entire network will be inoperable.

2. Requires more cable than most of the other topologies.

3. More expensive because of the cost of the hub/switch.

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RING NETWORK TOPOLOGY

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Ring Network Topology

On a ring network, a cable forms a closed loop ( ring ) with all computers and devices arranged along the ring.

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Ring Network Topology

Data transmitted on a ring network travels from node to node around the entire ring, in one direction

Token passing is one method for sending data around a ring

Each node takes a turn sending and receiving information through the use of a token.

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Ring Network Topology

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Ring Network TopologyAdvantages:

1. The transmission of data is relatively simple as packets travel in one direction only.

2. Cable faults are easily located, making troubleshooting easier.

3. The uses of token passing enables all nodes in a ring topology to share the network resources fairly.

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Ring Network Topology

Disadvantages:

1. A failure in any cable or node breaks the loop and can take down the entire network.

2. Data packets must pass through every computer therefore, this makes it slower.

3. A ring network can span a larger distance than a bus network, but it is more difficult to install.

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DEFINITION ADVANTAGES DISADVANTAGES

A bus network consists of a single central

cable (backbone), to which all

computers and other nodes

connect.

Inexpensive andeasy to install.

Other nodes can beattached or detached

without disturbingthe network.

Failure of one nodeusually does not

affect the restof the network.

The break in themain cable(backbone)

will prevent all systemsfrom accessing the

network.

It is difficult toidentify the problemif the entire network

Shut down.

SUMMARY:

BUS NETWORK TOPOLOGY

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DEFINITION ADVANTAGES DISADVANTAGES

All the computers and other nodeson the network

connect to a central device,thus forming a

star.

If one node fails,only that node

is affected.

If the hub or switchfails, the entirenetwork will be

inoperabled.

Nodes can be addedor removed fromnetwork with no

disruption.

Easy totroubleshoot andisolate problem.

Requires more cablesthan most of theother topologies.

More expensive because of the

cost of hub/switch.

SUMMARY:

STAR NETWORK TOPOLOGY

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SUMMARY:

DEFINITION ADVANTAGES DISADVANTAGES

On a ring network, a cable forms a

closed loop (ring) with all computers

and nodes arranged

along the ring.

Transmission of datais simple as packets

travel in onedirection only.

A failure in any cableor nodes breaks theloop and can take

down entirenetwork.

Cabel faults are easilylocated, makingtroubleshooting

easier.

All nodes in ring topolgy share thenetwork resources

fairly.

Data packets mustpass through every

computer, thus makeit slower.

More difficult toinstall than a bus network.

RING NETWORK TOPOLOGY

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1) Which of the following statements describe about network topology correctly ?

A. Nodes attached or detached at any point on the network.

B. The failure of device on the network.

C. Refers to the configuration of cables, computers and other peripherals.

D. All of the above.

EXERCISE:

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2) On a __________, all of the computers and nodes on the network connect to a central device.

A. Bus network.

B. Ring network.

C. Star network.

D. All of above.

EXERCISE:

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3) On a star network, the central nodes that provides a common connection point for nodes on the Network is called the ____________.

A. Hub.

B. Personal computer.

C. Printer.

D. File server.

EXERCISE:

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4) On a bus network, if one node fails ________.

A. Only that node is affected.

B. Only the nodes before that node are affected.

C. Only the nodes after that node are affected.

D. All the nodes are affected.

EXERCISE:

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The transmission of data is relatively simple as packets travel in one direction only.

5) The statement above is correctly refer to the _________________.

A. Bus network.

B. Ring network.

C. Star network.

D. All of the above.

EXERCISE: