ip addressing
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Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 1
Module 9
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 2
9.2.1 IP addressing
192.168.1.01. 192.168.1.12. 192.168.1.23. 192.168.1.34. 192.168.1.4
192.168.2.01. 192.168.2.12. 192.168.2.23. 192.168.2.34. 192.168.2.4
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 3
9.2.1 IP addressing
A device is not said to have an address, but that each of the connection points, or interfaces, on that device has an address to a network.
2 NIC cards…•2 MAC addresses•2 IP addresses
192.168.1.01. 192.168.1.12. 192.168.1.23. 192.168.1.34. 192.168.1.4
192.168.2.01. 192.168.2.12. 192.168.2.23. 192.168.2.34. 192.168.2.4
Does not pass data unless programmed to do so.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 4
9.2.1 IP addressing
These are consecutive numbers.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 5
9.2.3 IPv4 addressing
192.168.0.0 192.168.1.0192.168.2.0192.168.3.0192.168.4.0192.168.5.0192.168.6.0192.168.7.0192.168.8.0192.168.9.0192.168.10.0
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 6
9.2.3 IPv4 addressing
192.168.1.01. 192.168.1.12. 192.168.1.23. 192.168.1.34. 192.168.1.4
192.168.2.01. 192.168.2.12. 192.168.2.23. 192.168.2.34. 192.168.2.4
192.168.1.192.168.1.192.168.1.192.168.2.192.168.3.
This number must be a unique number, because duplicate addresses would make routing impossible.
The only time that the host numbers matter is when the data is on the local area network.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 7
9.2.3 IPv4 addressing
Classful Addressing.
• A multicast address is a unique network address that directs packets with that destination address to predefined groups of IP addresses.
• Therefore, a single station can simultaneously transmit a single stream of data to multiple recipients.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 8
9.2.3 IPv4 addressing
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 9
9.2.3 IPv4 addressing
The first octet range for Class E addresses is 11110000 to 11111111, or 240 to 255Reserved for research by IETF
All of these criteria identify the class of address.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 10
9.2.4 Class A, B, C, D, and E IP addresses
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 11
9.2.4 Class A, B, C, D, and E IP addresses
• You can use these addresses on any private LAN.
• You CANNOT use them on the internet. • Internet routers will block them.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 12
9.2.4 Class A, B, C, D, and E IP addresses
Error ?
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 13
9.2.4 Class A, B, C, D, and E IP addresses
Error ?
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 14
9.2.5 Reserved IP addresses An IP address that has binary 0s in all host bit positions is reserved for the network address.
A router uses the network IP address when it forwards data on the Internet.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 15
9.2.5 Reserved IP addresses An IP address that has binary 1s in all host bit positions is reserved for the broadcast address.
Data that is sent to the broadcast address will be read by all hosts on that network
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 16
9.2.5 Reserved IP addresses
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 17
9.2.5 Reserved IP addresses
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 18
9.2.5 Reserved IP addresses
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 19
9.2.5 Reserved IP addresses
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 20
9.2.6 Public and private IP addresses
It is appropriate to use private addressing on the private side of routers.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 21
9.2.6 Public and private IP addresses
• Originally, an organization known as the Internet Network Information Center (InterNIC) handled IP assignments.
• InterNIC no longer exists and has been succeeded by the Internet Assigned Numbers Authority (IANA).
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 22
9.2.6 Public and private IP addresses •Connecting a network using private addresses to the Internet requires translation of the private addresses to public addresses. •This translation process is referred to as Network Address Translation (NAT).
NAT is one solution to expand the number of public IP addresses. Two others are:
• classless interdomain routing • IPv6
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 23
9.2.7 Introduction to subnetting
For communication to occur between different physical network segments:
• IP address of the local (RARP) and destination hosts must be obtained.
• Only then, is it possible to transfer data packets from one network segment to another to reach the destination host.
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 24
9.2.7 Introduction to subnetting
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 25
9.2.7 Introduction to subnetting
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 26
9.2.8 IPv4 versus IPv6
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 27
9.2.8 IPv4 versus IPv6
Nov-03 ©Cisco Systems CCNA Semester 1 Version 3 Comp11 Mod9 – St. Lawrence College – Cornwall Campus, ON, Canada – Clark slide 28
9.2.8 IPv4 versus IPv6
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