Features

• Develops an elementary computer to demonstrate by example the organization and design of digital computers.
• Uses a simple register transfer language to specify various computer operations.

• Well laid out and beautifully illustrated Primer introduces the learners to the world of numbers.
• Notes for the teacher in the pre-primary level and class 1 act as guidelines and provide support while teaching. From class 2 onwards, these act as tips for the teachers and students alike on related topics.
• Let us revise revisits the concept/concepts already learnt.
• Try this! activities break the monotony of exercises and test application.
• Remember lays stress upon the concept learnt.
• Interesting facts engage the students with extra information n about the topic.
• Solved examples help in assimilation and retention of new topics.
• Exercises help to build confidence in the subject through ample practice questions.
• Worksheets and Model Test Papers at the end of the book are provided for recapitulation and self-evaluation.

• Unit page with Teacher’s notes helps the teacher in developing a comprehensive lesson plan.
• You already know lists the topics learnt previously.
• You will learn outlines the topics that will be taught in the chapter.
• You now know at the end of the lesson aids recapitulation of recently learnt topics.
• Titbits provides interesting information on the topic at hand.
• New words aids retention of scientific terms.
• Something more are interactive tasks related to the topic that also encourage environment consciousness.
• Test papers at the end of the book aid revision.

• After you have studied this lesson… lists topics to be discussed in the chapter.
• Step-by-step guidelines on new topics ensure a clearer understanding of the topics.
• Dialogue between young learners highlights practical problems before giving the solutions.
• Remember makes the learner aware of computer etiquettes.
• Activities, Examples and Learning games are provided to reinforce learning and understanding.
• Tech Talk provides a glossary of computer-related terms with their meanings.
• Revision tests the knowledge and applications of the chapter learnt.

• After you have studied this lesson… lists topics to be discussed in the chapter.
• Step-by-step guidelines on new topics ensure a clearer understanding of the topics.
• Dialogue between young learners highlights practical problems before giving the solutions.
• Remember makes the learner aware of computer etiquettes.
• Activities, Examples and Learning games are provided to reinforce learning and understanding.
• Tech Talk provides a glossary of computer-related terms with their meanings.
• Revision tests the knowledge and applications of the chapter learnt.

• New, in-depth deployment guidance: policy definition, representation, distribution, and management
• New IPSec enhancements: compression, multicast, key recovery, L2TP support, PKI integration, and more
• IPSec architecture and components: payloads, headers, Internet Key Exchange, security associations, and more
• Implementation architecture and techniques, including overlapping and shared security associations, nested and chained tunnels, and more
• IPSec security in host-to-host, host-to-gateway, and gateway-to-gateway scenarios
• Establishing secure VPN tunneling
• A detailed look inside the IPSec kernel