3.1.1 network topology complete
TRANSCRIPT
3.0 INTERNET TECHNOLOGY
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
LEARNING OUTCOMES
At the end of this topic, students should be able to:
1) Explain types of network topology
What Is a Network?
A network is a collection of computers and devices connected together via
communications devices and transmission media
Shelly Cashman
A network topology refers to the layout of the computers and devices in a communications network.
What Is a Network Topology?
Shelly Cashman
It refers to both the physical and logical layout of a network.
Types of network topology.Three commonly used network topologies are:
BUS NETWORK TOPOLOGY
Bus Network Topology
A bus network consists of a single central cable (backbone), to which all computers and other nodes connect.
Backbone
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.
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.
STAR NETWORK TOPOLOGY
Star Network Topology
All the computers and other nodes on the network connect to a central device, thus forming a star.
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
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
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.
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.
RING NETWORK TOPOLOGY
Ring Network Topology
On a ring network, a cable forms a closed loop ( ring ) with all computers and devices arranged along the ring.
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.
Ring Network Topology
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.
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.
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
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
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
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:
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:
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:
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:
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: