3.10 - Implement IP version 6 (IPv6) addressing and different addressing types Flashcards
What is the length of an IPv6 address?
128 bits.
How are IPv6 addresses represented?
8 16-bit segments separated by colons.
What are the two rules for compacting IPv6 addresses?
Leading 0’s in eash segment do not need to be written and any single, contiguous string of one or more 16-bit segments consisting of all zeroes can be represented with a double colon.
Why is it illegal to use more than one double colon in an IPv6 address?
it would cause the result to be ambiguous. You would not be able to tell how many segments are represented.
What is the difference between the IPv6 addresses ::/0 and ::/128?
::/0 is a default address and ::/128 is an unspecified address.
What is the part of the unicast IPv6 address that specifies the host?
Interface ID
What is the length of the host portion of an IPv6 address?
64 bits
What is the length of the Subnet ID portion of the unicast IPv6 address?
16 bits
What type of IPv6 address is FF80::/10?
Link-Local Unicast
What type of address is 3FFE:204:100:90::1?
Global Unicast
What is an anycast address?
Represents a service rather than a device in the network
What is a multicast address?
Identifies a set of devices
What is the length of the IPv6 header?
320 bits or 40 bytes
What is the purpose of the Flow Label field in the IPv6 header?
To identify flows of traffic by source/destination addresses and ports
To what field in the IPv4 header does the IPv6 Next Header field correspond?
The protocol field
To what field in the IPv4 header does the IPv6 Hop Limit field correspond?
Time to Live (TTL)
In what way is the IPv6 Next Header field like the IPv4 Protocol Number field, and in what way is it different?
I defines the upper level header is following like IPv4 or if an extension header is following (IPv6 only)
How do extension headers make IPv6 packets more efficient?
Only header information required is included and new extension headers can be developed.
What is the Next Header value of ICMPv6?
58
What is the significant difference between IPv4 fragmentation and IPv6 fragmentation?
Only originating nodes can fragment. Routers do no fragment.
What two steps does MAC-to-EUI64 conversion use to derive an Interface ID?
It inserts 0xFFFE in the middle of a MAC address then flips the U/L bit (7th bit in the MAC Address) to 1 to create the 64-bit Interface ID from a 48-bit MAC address
What is a privacy address?
One where the Interface ID is randomly generated.
What type of IPv6 address is ::/128?
Unspecified
What type of IPv6 address is ::1/128?
Loopback
What type of IPv6 address is FF00::/8?
Multicast
What type of IPv6 address is FFC0::/10?
Site-Local Unicast
What type of IPv6 address is 2xxx::/4 or 3xxx::/4?
Global Unicast (Currently allocated)
What type of IPv6 address is ::/0?
Default address
How do you recognize an IPv6 global unicast address in binary?
the high-order bits are 001
What is IPv6 address FF02::1?
All nodes multicast
What is IPv6 address FF02::2?
All routers multicast
What is IPv6 address FF02::5?
All OSPFv3 routers multicast
What is IPv6 address FF02::6?
OSPFv3 designated routers multicast
What is IPv6 address FF02::9?
RIPng routers multicast
What is IPv6 address FF02::A?
EIGRP routers multicast
What is IPv6 address FF02::B?
Mobile agents multicast
What is IPv6 address FF02::C?
DHCP Servers/Relay Agents multicast
What is IPv6 address FF02::D?
All PIM routers multicast
What command enables IPv6 routing?
ipv6 unicast-routing
What is the command to enable CEF on IPv6?
ipv6 cef
