IPV6
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17 terms
Terms | Definitions |
|---|---|
 Need for IPV6 | Address Exhaustion Protocol Security Multicast Traffic |
| Benefits of IPV6 | More Addresses Security Support Mandatory Global Multicast Support No Broadcasts Mobility Simplified Routing Fixed Extendable Header No Packet Fragmentation Auto Configuration |
| More Addresses | IPv6 uses a 128 bit address space That is about 340,282,366,920,938,000,000,000,000,000,000,000,000 addresses |
| Security Support Mandatory | IPSec provides Encrypted transport Certificate based authentication |
| Global Multicast Support | IPv6 provides global multicast support. If you can route to it you can multicast to it! |
| Mobility | IPv6 has the ability for entire subnets to move from one router to another router without needing address re-assignment |
| TTL | TTL is now a hop count rather than time based for simpler calculation |
| Simplified Routing | IPv6 uses a fixed length subnet mask. All Subnets are /64 Simplified packet header. This facilitates efficient routing No header checksum to calculate -Link layer and higher layer checksums are relied upon for header integrity |
| MTU | Maximum transmit unit: Path MTU Discovery -Packet is sent using routers MTU, any router along the way that can not handle the packet sends an ICMPv6 packet to big message back with its MTU |
| No packet fragmentation | Routers do not fragment IPv6 Packets Maximum packet size must be established prior to transmission |
| Compressing 0's | Long strings of zeros may be shortened with :: (you can only substitute once in an address!) For example 2001:DB8:0:0:8:800:200C:417A becomes 2001:DB8::8:800:200C:417A |
| Unicast | Unicast addresses identify a single network interface. This is the most common type of address used. And is analogous to an IPv4 address |
| Unicast address types | Global address Link-local address Unique-local address |
| Anycast | An Anycast address is an address that is applied to more than one interface. When a packet is routed to an Anycast address it is delivered to the first interface discovered configured with that Anycast address |
| Multicast | When a packet is sent to a multicast address the packet is delivered to all hosts that are assigned that multicast address |
| Link-Local | Link local address are addresses that are automatically configured using the interfaces hardware address. These addresses are not routable! Link local address use the prefix fe80::/10 |
| Unique Local | Unique local address are similar in nature to IPv4 private Addresses in that they are not assigned by a numbering authority, however they are probably globally unique and are routable within participating sites |
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