AQA A2AQA A2

COMP 3: Computer COMP 3: Computer NetworksNetworks

Starter: Warriors of the netStarter: Warriors of the net

http://www.youtube.com/watch?v=Ve7_4ot-Dzs

Watch warriors of the net at homeWatch warriors of the net at home

Find out what ICMP is, the role of a Find out what ICMP is, the role of a proxy server and the port used for a proxy server and the port used for a webserverwebserver

Exam questions: thinking aheadExam questions: thinking ahead

Answer

A. i) 192.168.0.x X = 1 – 254 but not 0 or 255

A. ii) 192.168.2.x X = 1 - 254 but not 0 or 255

255.255.255.0

Ip address, subnet mask and gateway

Plan for this lessonPlan 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

Web 2.0 Link: We are creating and organising data: We are creating and organising data

XML used to automate data and join different XML used to automate data and join different sets of data togethersets of data together

People are sharing, trading and collaboratingPeople are sharing, trading and collaborating

Web 2.0: range of uses for the web which are Web 2.0: range of uses for the web which are focused on interactivity. Cloud computing.focused on interactivity. Cloud computing.

Facebook/Twitter, blogs, forums users are Facebook/Twitter, blogs, forums users are contributing data using different platforms contributing data using different platforms

Wireless networkWireless network Setting up a traditional network involves Setting up a traditional network involves

using UTP cables that go through walls using UTP cables that go through walls and ceiling and ceiling

WAP allows devices connecting wirelessly WAP allows devices connecting wirelessly to connect to a networkto connect to a network

So we can have devices connected to the So we can have devices connected to the network without cablesnetwork without cables

Note: 802.11 (wireless standard)Note: 802.11 (wireless standard)

Scenario (10)Scenario (10) PRC, a local city college wants to setup PRC, a local city college wants to setup

wireless network in its traditional buildingswireless network in its traditional buildings

They want students to be able to access They want students to be able to access the network using their own devices the network using their own devices

Research potential benefits and drawbacks Research potential benefits and drawbacks of using wireless networks of using wireless networks

IdeasIdeas

SecuritySecurity

PerformancePerformance

ManagementManagement

Content filteringContent filtering

Bluetooth (8)Bluetooth (8) Bluetooth is used to exchange data over a Bluetooth is used to exchange data over a

short distance, usually up to 10 metresshort distance, usually up to 10 metres

Alternative to RS232Alternative to RS232

Bluetooth uses radio frequency and offers Bluetooth uses radio frequency and offers transfer speeds of up to 2 Mbpstransfer speeds of up to 2 Mbps

It creates a personal area network. Search It creates a personal area network. Search for any articles that show any flaws in for any articles that show any flaws in Bluetooth technologyBluetooth technology

IP address / IP addressingIP address / IP addressing

NumberNumber UniqueUnique Broken down into two sectionsBroken down into two sections Network and host L= net R = hostNetwork and host L= net R = host Public and private addressingPublic and private addressing IP addresses were originally broken IP addresses were originally broken

down into classes i.e. classful down into classes i.e. classful addressingaddressing

Activity Activity

Find out the difference between public and Find out the difference between public and private addressprivate address

Find out your public address and private Find out your public address and private addressaddress

(Routable and on routable)(Routable and on routable)

DemoDemo

PingPing

TracertTracert

Ipconfig / all (go through ip, subnet Ipconfig / all (go through ip, subnet mask and default gateway)mask and default gateway)

NslookupNslookup

NCPA.CPLNCPA.CPL

Plan for this lessonPlan 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

Read page 190:

web services web services architecture

and page 191 Ajax

Exam questions: thinking aheadExam questions: thinking ahead

Next lessonNext lesson

Network hopsNetwork hops

Next lesson

Cover: IP address range and classes Do a bit of subnetting where possible Get packet tracer

Online version packet tracer