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Week-5 Network Layer Ch-6.pptx

Week-5 Network Layer Ch-6.pptx - Chapter 6 Network Layer...

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© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Presentation_ID 1 Chapter 6: Network Layer Introduction to Networks
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Presentation_ID 2 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Network Layer in Communication Network Layer Protocols Common network layer protocols include: IP version 4 (IPv4) IP version 6 (IPv6) Legacy network layer protocols include: Novell Internetwork Packet Exchange (IPX) AppleTalk Connectionless Network Service (CLNS/DECNet)
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Presentation_ID 3 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential IP Characteristics IP Components
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Presentation_ID 4 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Characteristics of the IP protocol IP - Connectionless
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Presentation_ID 5 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Characteristics of the IP protocol Best Effort Delivery
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Presentation_ID 6 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Characteristics of the IP protocol IP – Media Independent
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Presentation_ID 7 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential IPv4 Packet Encapsulating IP
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Presentation_ID 8 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential IPv4 Packet IPv4 Packet Header Contents of the IPv4 packet header
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Presentation_ID 9 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Network Layer in Communication Limitations of IPv4 IP Address depletion Internet routing table expansion Lack of end-to-end connectivity
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Presentation_ID 10 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Network Layer in Communication Introducing IPv6 Increased address space Improved packet handling Eliminates the need for NAT Integrated security 4 billion IPv4 addresses 4,000,000,000 340 undecillion IPv6 addresses 340,000,000,000,000,000,000,000,000,000,000,000,000
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Presentation_ID 11 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential IPv6 Packet IPv6 Packet Header Version Traffic Class Flow Label Payload Length Next Header Hop Limit Source IP Address Destination IP Address Byte 1 Byte 2 Byte 3 Byte 4
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© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Presentation_ID 12 6.2 Routing
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Presentation_ID 13 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Host Routing Tables Host Packet Forwarding Decision
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Presentation_ID 14 © 2008 Cisco Systems, Inc. All rights reserved.
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