chap6 - Addressing The Network IPv4 Network Fundamentals...

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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE I Chapter 6 1 Addressing The Network – IPv4 Network Fundamentals – Chapter 6 Modified by Tony Chen 05/20/2008 http://en.utrace.de/
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 2 Notes: If you see any mistake on my PowerPoint slides or if you have any questions about the materials, please feel free to email me at [email protected] . Thanks! Tony Chen College of DuPage Cisco Networking Academy
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 3 Objectives In this chapter, you will learn to: Explain the structure IP addressing and demonstrate the ability to convert between 8-bit binary and decimal numbers. Given an IPv4 address, classify by type and describe how it is used in the network. Explain how addresses are assigned to networks by ISPs and within networks by administrators. Determine the network portion of the host address and explain the role of the subnet mask in dividing networks. Given IPv4 addressing information and design criteria, calculate the appropriate addressing components. Use common testing utilities to verify and test network connectivity and operational status of the IP protocol stack on a host.
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 4 The Anatomy of an IPv4 Address At the Network layer, the packets need to be identified with the source and destination addresses of the two end systems. –Each device on a network must be uniquely defined. –Each packet has a 32-bit source address and a 32-bit destination address in the Layer 3 header. –These addresses are used in network as binary patterns. For us in the human network, a string of 32 bits is difficult to interpret and even more difficult to remember. Therefore, we represent IPv4 addresses using dotted decimal format. Dotted Decimal; Binary; Octet Each byte of the binary pattern, called an octet. •Each decimal number represents one byte or 8 bits, or an octet. –Binary address: 10101100 00010000 00000100 00010100 –Dotted decimal address: •172.16.4.20
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 5 The Anatomy of an IPv4 Address Network Portions For each IPv4 address, some portion of the high-order bits represents the network address. •At Layer 3, we define a network as a group of hosts that have identical bit patterns in the network address portion of their addresses. Host Portions The number of bits used in this host portion determines the number of hosts that we can have within the network. •For example, if we need to have at least 200 hosts in a particular network, we would need to use enough bits in the host portion to be able to represent at least 200 different bit patterns. •To assign a unique address to 200 hosts, we would use the
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This note was uploaded on 02/12/2012 for the course NETWORKING NETW204 taught by Professor Baig during the Spring '09 term at DeVry Addison.

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chap6 - Addressing The Network IPv4 Network Fundamentals...

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