ITGS: Tech Firms’ Data Is Also Tapped: Be careful...

Be careful internet users.

By Amir Efrati, Jessica E. Lessin, Jennifer Valentino-DeVries

The Obama administration acknowledged the existence Thursday of a secret National Security Agency program dubbed Prism, which a senior administration official said targets only foreigners and was authorized under U.S. surveillance law. Read in detail: Your data is not protected on line- Facebook, Google, Apple, Yahoo etc.

ITGS: SINGAPORE ROLLS OUT 120,000 DEVICES TO SCHOOLS

IT is integrated part of education system. We must encourage others to learn. There is no alternative for this now.
Read all details. By Thanya Kunakornpaiboonsiri | 30 August 2012
Click here: Details

ITGS: Convert your mobile to credit card and debit card

In the recent times, advancements in mobile technology have been astounding. What is more stunning is the rate at which these developments have occurred. From what used to be a handheld device that enabled talking and texting, mobile phones today can perform numerous tasks that require high levels of artificial intelligence. One of the most amazing developments in mobile technology is the NFC or Near Field Communication. This technology converts your mobile phone into your virtual credit or debit card. The uses and functionality of the technology are immense. NFC has definitely made payments via mobile phones faster, easier and safer. In doing so, it has set the foundation to substitute conventional credit and debit cards.

More details: Mobile or credit card or debit card

ITGS & CS: Syllabus for June 2013 comprehensive

Dear All, start preparing from the syllabus given below for the June comprehensive exams. Make yourself aware about the topics and revise them properly. Come to me in your free classes for remedial.

11-ITGS:

Strand 1: Social and ethical significance

SL/HL core

Social and ethical considerations linked to specified IT developments.

Students must study the following 12 issues.

1.1 Reliability and integrity

1.2 Security

1.3 Privacy and anonymity

1.4 Intellectual property

1.5 Authenticity

1.6 The digital divide and equality of access

1.7 Surveillance

1.8 Globalization and cultural diversity

1.9 Policies

1.10 Standards and protocols

1.11 People and machines

1.12 Digital citizenship

Strand 2: Application to specified scenarios

SL/HL core

Scenarios based on real-life situations must be used when addressing specified IT

developments.

Students must study the following 6 themes.

2.3 Environment

2.4 Health

Starnd 3:IT systems

SL/HL core

The terminology, concepts and tools relating to specified IT developments.

Students must study the following 9 topics.

3.1 Hardware

3.2 Software

3.6 Multimedia/digital media

3.7 Databases

3.8 Spreadsheets, modelling and simulations

ITGS students will get paper as per IB pattern. HL students will get paper 3 from May 2013 case study.

11-CS:

Topic 1—System fundamentals

1.2 System design basics

Topic 2—Computer organization( Complete)

2.1 Computer organization

Topic 3—Networks(Complete)

Topic 4—Computational thinking, problem-solving and Programming

4.2 Connecting computational thinking and program design

4.3 introduction to programming

Topic 5—Abstract data structures

5.1 Abstract data structures( from 5.1.1 to 5.1.10)

D—Object-oriented programming

D.2 Features of OOP

D.3 Program development

CS students will get paper 1 and Paper 2. Questions in both papers might be separate for HL and SL students.

Paper1- 2hrs., MM-80

Paper2- 1Hr, MM-50

Weighting as per IB pattern for HL and SL.

Best Of Luck

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WiMAX and MAC

http://youtu.be/mLYsPgeHFu4

WiMAX

more details


MAC: What is MAC Address? 

MAC, Media Access Control, address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address. MAC addresses are 6-byte (48-bits) in length, and are written in MM:MM:MM:SS:SS:SS format. The first 3-bytes are ID number of the manufacturer, which is assigned by an Internet standards body. The second 3-bytes are serial number assigned by the manufacturer.

MAC layer represents layer 2 of the TCP/IP (adopted from OSI Reference Model), where IP represents layer 3. MAC address can be thought of as supporting hardware implementation whereas IP address supports software implementation. MAC addresses are permanently burned into hardware by hardware manufacturer, but IP addresses are assigned to the network devices by a network adminstrator. DHCP relies on MAC address to assign IP addresses to network devices.

How do I find a MAC address of network device? 

Operating Systems support various command-line and GUI utilities to allow users to find MAC address of the system. On Unix variants including Solaris and Linux support "ifconfig -a", "ip link list" or "ip address show" command that displays MAC address of the network device among other useful information. Windows including NT, 2000, XP and 2003 support"ipconfig /all" command that displays MAC address. On a MacOS, one can find MAC address by opening "System Preferences", then selecting "Network".

Mobile phones: 1G 2G 3G 4G

1G
1G is short for first-generation wireless telephone technology. This generation of phones and networks is represented by the brick-sized analog phones introduced in the 1980’s. Subsequent numbers refer to newer and upcoming technology.

2G
2G phones use digital networks. Going all-digital allowed for the introduction of digital data services, such as SMS and email. 2G networks and their digital nature also made it more difficult to eavesdrop on mobile phone calls.

3G
3G networks are an in between standard. 3G is seen more as pre4G instead of a standard of its own. The advantage 3G networks have over 2G networks is speed. 3G networks are built to handle the needs of today’s wireless users. This standard of wireless networks increases the speed of internet browsing, picture and video messaging, and handheld GPS use.

4G
4G ( Beyond 3G) is like the other generations in that its advantage lies in promised increased speeds in data transmission. There is currently no formal definition for 4G, but there are objectives. One of these objectives is for 4G to become a fully IP-based system, much like modern computer networks. The supposed speeds for 4G will be between 100 Mbit/s and 1 Gbit/s. 

Source: http://it.med.miami.edu/x1645.xml

Why do i believe that cloud computing is safe for me?

Read about cloud computing;

1. Cloud computing

2. What do you mean by cloud computing?



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