AQA A2
COMP 3: Computer
Networks
Starter: Warriors of the net
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http://www.youtube.com/watch?v=V
e7_4ot-Dzs
Watch warriors of the net at home
Find out what ICMP is, the role of a
proxy server and the port used for a
webserver
Exam questions: thinking ahead
Answer
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A. i) 192.168.0.x
X = 1 – 254 but not 0 or 255
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A. ii) 192.168.2.x
X = 1 - 254 but not 0 or 255
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255.255.255.0
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Ip address, subnet mask and gateway
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Plan for this lesson
By the end of the lesson you will be to:
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Describe the principles and practices that tie
together different uses of WWW
Describe wireless networking and the things
to consider
Explain and be able to setup a computer
using ip, gateway and subnet mask
Web 2.0
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Link: We are creating and organising data
XML used to automate data and join different
sets of data together
People are sharing, trading and collaborating
Web 2.0: range of uses for the web which are
focused on interactivity. Cloud computing.
Facebook/Twitter, blogs, forums users are
contributing data using different platforms
Wireless network
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Setting up a traditional network involves
using UTP cables that go through walls
and ceiling
WAP allows devices connecting wirelessly
to connect to a network
So we can have devices connected to the
network without cables
Note: 802.11 (wireless standard)
Scenario (10)
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PRC, a local city college wants to setup
wireless network in its traditional buildings
They want students to be able to access
the network using their own devices
Research potential benefits and drawbacks
of using wireless networks
Ideas
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Security
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Performance
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Management
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Content filtering
Bluetooth (8)
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Bluetooth is used to exchange data over a
short distance, usually up to 10 metres
Alternative to RS232
Bluetooth uses radio frequency and offers
transfer speeds of up to 2 Mbps
It creates a personal area network. Search
for any articles that show any flaws in
Bluetooth technology
IP address / IP addressing
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Number
Unique
Broken down into two sections
Network and host L= net R = host
Public and private addressing
IP addresses were originally broken
down into classes i.e. classful
addressing
Activity
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Find out the difference between public and
private address
Find out your public address and private
address
(Routable and on routable)
Demo
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Ping
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Tracert
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Ipconfig / all (go through ip, subnet
mask and default gateway)
Nslookup
NCPA.CPL
Plan for this lesson
By the end of the lesson you will be to:



Describe the principles and practices that tie
together different uses of WWW
Describe wireless networking and the things
to consider
Explain and be able to setup a computer
using ip, gateway and subnet mask
Homework for next lesson
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Read page 190:
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web services
web services
architecture
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and page 191 Ajax
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Exam questions: thinking ahead
Next lesson
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Network hops
Next lesson
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Cover:
IP address range and classes
Do a bit of subnetting where possible
Get packet tracer
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Online version packet tracer
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