Transcript network jeopardy

Networks
JEOPARDY
Unit 3 & 4 IP&M
Acknowledgements:
• VITTA for the jeopardy pro-forma
• Mark Kelly’s Network slideshow
Reasons For
Networks
Network
Hardware
Network
Types
Lucky
Dip
Network
Topologies
100
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200
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300
300
300
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400
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500
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Reasons For Networks
100
At its simplest, a network is two or
more computers that are connected so
they can exchange information and
share resources.
A: What is a network?
Reasons For Networks
200
Email, videoconferencing and chat are
examples of how a network improves this.
A: How does a network improve communications?
Reasons For Networks
300
a They allow you to share information,
save money on expensive equipment
and communicate better with customers
and employees.
A: Why network?
Reasons For Networks
400
Faster communication, cost savings
(compare email costs with phone calls
and physical travel)
A: What are the efficiency indicators of a network?
Reasons For Networks
500
Collaborative work is easier, access to
resources broader.
A: How does a network make an organisation more effective?
Network Hardware
100
This allows a stand-alone computer to
connect to a network. There are cabled
and wireless cards.
A: What is a NIC (network interface card)?
Network Hardware
200
This is a robust central computer at the
heart of the network
A: What is a server?
Network Hardware
300
These are connection points where
cables can join up a split. Typically, a
single incoming cable is split into
multiple outgoing cables.
A: What is a switch?
Network Hardware
400
These are security devices that guard the
connection between a LAN and the outside
world (another LAN or WAN). They can be
programmed to allow only authorised
incoming and outgoing traffic as well as
block one part of the network from another
part.
A: What is a router?
Network Hardware
500
These boost fading network signals on
long cables.
A: What is a repeater?
Network Types
100
It is typically restricted to one building or
one site. Can be cabled - UTP, coaxial or
wireless. Longer distance between
buildings may need fibre optic cable.
A: What is a LAN?
Network Types
200
It is spread over wide distances.
Connections use landline data
cables (eg ISDN, ADSL),
satellite.
A: What is a WAN?
Network Types
300
It is usually within a limited geographical
region eg. A city. Connections usually
with landline data cables (ISDN, ADSL),
microwave, fibre optic cable.
A: What is a MAN?
Network Types
400
This is made up of inter-networked WANS.
May run on UTP, coaxial, fibre optic,
satellite, microwave, wireless, mobile
phones, modems over phone lines. High
speed digital data lines, submarine cables and
even mains power lines.
A:What is the Internet?
Network Types
500
The universal protocol for Internet use the backbone of the Internet.
A: What is TCP/IP?
(transfer communication protocol/ internet protocol)
Lucky Dip
100
A: What does a star topology look like?
Lucky Dip
200
This is made of glass and is optical not
electrical meaning little signal fade. Can
transmit multiple signals on a single
fibre. It is very fast, flexible, has high
bandwidth, can travel long distance
without repeaters and is very secure.
A: What is fibre optic cable?
Lucky Dip
300
This allows only one node to transmit at
one time. A node can only transmit if it
holds a special network packet called a
token.
A: What is a token ring network?
Lucky Dip
400
This defines both how packets are handled
and cabling options. When a node wants to
communicate to another node, it transmits its
addressed packet. The packet travels to every
node on the segment. Each node inspects the
packet however only accepts it if it is
addressed to them.
A: What is Ethernet?
Lucky Dip
500
Two examples of this are:
• Quality of the connection needs to be higher where there
are many users as more people connected can slow down
transmission. (think of our Internet connection
• Users sometimes have to wait for resources (eg. Print
queues)
A: What are two problems for the average network user?
Network Topologies
100
In this type of topology every device has
exactly two neighbours for communication
purposes. All messages travel in the same
direction. A failure in any cable or device
will take down the entire segment. They are
more expensive and slower.
A: What is a ring topology.?
Network Topologies
200
This topology has a central connection
point- usually a hub or switch with cables
branching to many nodes. While it takes
more cable, the benefit is that is a cable
fails; only one node will be brought down.
A: What is a star topology?
Network Topologies
300
Also known as the ‘hierarchical topology’,
this topology is a combination of bus and star
topologies and is very common in larger
networks. The node in the highest point in
the hierarchy – usually the server – controls
the network.
A. Why is a tree topology?
Network Topologies
400
This topology uses lots of cables to
connect every node with every other
node. It is very expensive to wire up but
if one cable fails there are alternative
ways to communicate.
A: What is mesh topology?
Network Topologies
500
Many devices connect to a single cable
‘backbone’. If the backbone is broken the entire
segment fails. They are relatively easy to install
and don’t require much cabling compared to the
alternatives, however they get congested with
too many nodes. They are best for small
networks.
A: What is a bus topology?