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Intro to Ipv4 & Ipv6

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Assignment 9. Research Paper

Introduction to IPv4 & IPv6

IPv4 is the fourth version of Internet protocol which uses 32 bit addressing whereas IPv6 is a next generation internet protocol which uses 128 bits addressing. 32 bits long (4 bytes). IPv4 is a classful logical addressing scheme using three primary address classes: Class A, Class B, and Class C. The class of the address is determined by the first number in the IP address. The total number of IPv4 addresses is 4, 294, 967,296. Address type: Unicast, multicast, and broadcast. IPv4 expressed in dotted decimal notation.
The new concepts and new implementation of old concepts in IPv6 include the following: * Larger address space (128-bit vs. 32-bit) * Autoconfiguration of Internet-accessible addresses with or without DHCP (without DHCP it’s called stateless autoconfiguration) * More efficient IP header (fewer fields and no checksum)
IPv4 allows 4,294,967,296 unique addresses whereas IPv6 can hold 340-undecillion (34, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000) unique IP addresses. 128 bits long (16 bytes). Basic architecture is 64 bits for the network number and 64 bits for the host number. Often, the host portion of an IPv6 address (or part of it) will be a MAC address or other interface identifier. Address type: Unicast, multicast, and broadcast and anycast. IPv6 expressed in colon hexadecimal notation.

DHCP servers in Linux can be configured to use IPv6: * Step 1: configure a fixed IPv6 address on your ethernet card
To specify a fixed (manual) IPv4/IPv6 address, you need to modify the file /etc/network/interfaces: * Step 2: install the DHCPv6 server
#apt-get install isc-dhcp-server * Step 3: configure the DHCPv6 server
Be sure that your server will listen for DHCP request on the correct interface. Edit the /etc/default/isc-dhcp-server file:...

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