Chapter 12 IPv6 Addressing
Rules for IPv6 notation
- omit leading zeros example 01ab is displayed as 1ab or 00ab =ab -Double Colon example: 2001:db8:cafe:1:0:0:0:1 = 2001:db8:cafe:1::1 Double colon is only allowed once in an IPv6 address.
What is the minimum configuration for a router interface that is enabled for IPv6?
- to have a link-local IPv6 address
What is the recommended prefix length for most IPv6 subnets?
-/64
Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the following address: 2001:db8:cafe:1111:2222:3333:4444:5555
-1111
Your organization is issued the IPv6 prefix of 2001:db8:130f::/48 by your service provider. With this prefix, how many bits are available for your organization to create /64 subnetworks if interface ID bits are not borrowed?
-16
Hextet
-16 bits of information. - omit leading zeros example 01ab is displayed as 1ab or 00ab =ab
What is the prefix associated with the IPv6 address 2001:DB8:D15:EA:CC44::1/64?
-2001:DB8:D15:EA::/64
What is the network address for the IPv6 address 2001:DB8:AA04:B5::1/64?
-2001:DB8AA04:B5
What is the most compressed representation of the IPv6 address 2001:0db8:0000:abcd:0000:0000:0000:0001?
-2001:db8:0:abcd::1
What is the interface ID of the IPv6 address 2001:DB8::1000:A9CD:47FF:FE57:FE94/64?
-A9CD:47FF:FE57:FE94
Which IPv6 network prefix is only intended for local links and can not be routed?
-FE80::/10
True or False. RA messages are sent to all IPv6 routers by hosts requesting addressing information.
-False
True or False: The Subnet ID field in an GUA must borrow bits from the interface ID.
-False
What is indicated by a successful ping to the ::1 IPv6 address?
-IP is properly installed on the host
What is the purpose of the command ping ::1?
-It tests the internal configuration of an IPv6 host.
What type of IPv6 address begins with fe80?
-LLA
Which type of IPv6 unicast address is not routable between networks?
-LLA
Which dynamic addressing method for GUAs is the one where devices rely solely on the contents of the RA message for their addressing information?
-Method 1 :SLAAC
methods of RA messages
-Method 1 SLAAC -Method 2 SLAAC with a stateless DHCPv6 server -Method 3 Stateful DHCPv6 (no SLAAC)
Which dynamic addressing method for GUAs is the one where devices rely solely on a DHCPv6 server for their addressing information?
-Method 3: Stateful DHCPv6
What are the two methods a device can use to generate its own IPv6 interface ID?
-Randomly generated -EUI-64
Which field in an IPv6 GUA is used for subnetting?
-Subnet ID
IPv6 Unicast
-The source address must be a unicast address. -types: Global Unicast (GUA) Link-local address (LLA) Loopback Unspecified Address Unique Local Embedded IPv4
True or False? IPv6 was designed with subnetting in mind.
-True
What are three parts of an IPv6 global unicast address? (Choose three.)
-a subnet ID that is used to identify networks inside of the local enterprise site. -a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP -an interface ID that is used to identify the local host on the network.
Which address type is not supported in IPv6?
-broadcast
At a minimum, which address is required on IPv6-enabled interfaces?
-link-local
What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?
-link-local
Which dynamic addressing method for GUAs is the one where devices get their IPv6 configuration in a RA message and request DNS information from a DHCPv6 server?
-method : SLLAC and Stateless DHCPv6
RS and RA messages
Router Advertisement (RA) messages. -ICMPv6 can dynamically assign the GUA address. - RS messages are sent to to IPv6 routers by their hosts, this message is requesting addressing information. RA messages are set to all IPv6 nodes.
IPv6 commands
Similar to those of IPv4 commands. The IPv6 version of ip address for example is ipv6 address.
network prefix and prefix length
Tells the device which network it belongs to.
default gateway address
The address of the computer that provides a connection to the Internet. -IPv6 LLA, the source IPv6 address of the RA message.
For IPv6 given a /32 Global Routing Prefix and a /64 prefix, how many bits would be allocated for the Subnet ID? 8 16 32 48 64
32
Which part of a GUA is assigned by the ISP?
Global Routing Prefix
ipv6 unicast-routing
a command to enable IPv6 on a router as routers are not enabled to route IPv6 addresses by default and must first be enabled.
Which type of IPv6 address is not routable and used only for communication on a single subnet?
link-local address
