Module 2 Chapter 6 Network Essentials
If there is a % at the end of ipv6 what does it identify?
%10 at the end of the IPv6 address is a zone index and identifies the NIC...
In an IPv6 address the interface identifier is known by what bits and what physical address is it related to?
(The last 64 bits) is used in place of the MAC address. Windows Server 2008 uses an EUI 64-bit address (EUI-64) defined as part of IPv6. Gigabit network interface cards are configured with EUI-64 addresses. IPv6 uses the 48-bit MAC addresses on older cards and adds 16 extra bits to reach 64 bits.
What do the first three bits identify in an IPv6?
001 (2) - First three bits 001 Hex(2) identify a global unicast address most of them start with 2001
What method used to help migration between ipv4 and ipv6?
6to4 is another method that used to help the migration between IPv4 and IPv6. It allows IPv6 traffic to be transmitted over an IPv4 network and is popular with routers used in (SOHOs).
What topologies do the bits mean in a global unicast address? What are one of the topologys assigned too?t
8 bits of the global unicast address make up the public topology, and the next 16 bits make up the site topology. Addresses in public topologys are assigned to Internet service providers (ISPs).
What IPv6 protocol is used to identify routers on the same network?
A Network Discovery uses ICMPv6 messages for router discovery.
How is a classful IP address identified?
A classful IP address is identified by the first decimal in the IP address. For example, an IP address of 10.80.1.1 has 10 as the first decimal, which is in the Class A range of 1 to 126.
Which of the following addresses is a valid IPv6 address?
C. IPv6 addresses are expressed as groups of hexadecimal characters. Valid hexadecimal characters...
What is a nice thing about DHCPv6?
DHCPv6 servers aren't required on each subnet. If your network includes multiple subnets, you can place DHCPv6 relay agents on each subnet to listen for the DHCPv6 solicit messages and then forward them to the DHCPv6 server.
What key functions does ND carry out?
Discovers Routers, Discovers IPv6 Prefixes (Similar to submasks), Discovers Parameters, Address's Auto Configuration (Detects local addresses already in use), Resolves Physical Addresses (Similar to ARP and MAC)
You need to manually assign an IPv6 address to a client computer for use within a private network. Which one of the following addresses should you use?
E. Unique local addresses are assigned as private addresses. They have a prefix of fd hexadecimal.
True or false. An IPv6 address with a prefix of FD is a link-local address.
False. The IPv6 prefix of FD is for unique local addresses. Link-local addresses have a prefix of fe80.
What will the first number be in a unique IPv6 address assigned to a host interface? Hint; Global unicast addresses...)
Formal definition for global unicast addresses says that only the first three digits are specified as 001, meaning that it could be 0010 (hex 2) or 0011 (hex 3). However, 0011 is reserved and can't be used. In other words, the first number will always be a 2.
Which of the following features is built into IPv6 to provide extra security?
IPSec
What Organization assigns Global Unicast addresses?
IPv6 global unicast addresses are assigned by the Internet Assignment Numbers Authority (IANA). They have assigned several banks of IPv6 addresses starting with 2001 (such as 2001:0000, 2001:0200, 2001: 0400, and so on). They have also assigned some addresses starting with 2400, 2600, and more, but 2001 remains the most popular
How many bits does IPv6 have and how are addresses displayed?
IPv6 uses 128 bits and can address more than 340 undecillion IP addresses. IPv6 addresses are displayed as hexadecimal characters instead of the dotted decimal format of IPv4.
In an IPv6 address what are the first and last 64 bits called and what physical address is it related too?
In IPv6, the first 64 bits are typically the network ID, and the last 64 bits are the interface identifier which is similar to the Media Access Control (MAC) address, or physical address used in IPv4.
What are link-local addresses similar too? Also, what is a key bad staple about them?
Link-local addresses are similar to APIPA addresses. If a DHCPv6 server or an IPv6 router isn't available to assign an IPv6 address, an IPv6 client can assign itself a link-local address to communicate with other hosts on the same network. link-local addresses are not routable...
IPv6 Provides trillions compared to billions from IPv4. What are the 3 main good to know improvements...
Native support for IPSec easy encryption. More efficient routing reduces the number of routes. Easy host configuration (DHCPv6), meaning no APiPa and easy configuration of an IPv6 address.
What is Neighbor Discovery?
Neighbor Discovery (ND) is an IPv6 protocol that uses Internet Control Message Protocol version 6 (ICMPv6) messages to discover details about a network.
What helps reduce number of needed public IP addresses?
Network Address Translation (NAT) helped reduce the number of public IP addresses needed.
How does dual IP stacking work?
One way that the IPv4/IPv6 dual IP stack works is by supporting IPv4-mapped IPv6 addresses. Its also expressed with zero compression
What is the DHCPv6 server process?
Solicit (Client), Advertise(server), Request(Client), Reply (server).
What are the two configuration options called when a server assigns an IPv6 address, or when the computer assigns it locally?
Stateful done by the DHCPv6 server, and stateless done by communicating with the local router.
What IPv6 to IPv4 technology uses tunneling to encapsulate an IPv6 packet within an IPv4 packet?
Teredo. Terodo is a tunneling protocol that encapsulates IPv6 packets within IPv4 datagrams. This allows the IPv6 packets to transit through these devices. Teredo is needed for NAT devices that translate private IPv4 addresses to public IPv4 addresses and translate public IPv4 addresses back to private IPv4 addresses. Once IPv6 is fully implemented, Teredo won't be needed anymore.
What does IPv6 prefix identify?
The IPv6 prefix identifies the type of IPv6 address. Prefixes often are accompanied by a prefix notation similar to /3 or /32 (masks). Its just the same in how many bits are behind the scenes. For example, 2001 /3 indicates only the first three bits in the prefix, but 2001:0000 /32 indicates the first 32 bits that are in the prefix.
What takes the place of replacing groups of zeros?
The double colon (::) takes the place of three groups of zeros (0000:0000:0000).
What identifies unique local addresses.
The first seven bits used typically will be FD... with the whole address... But remove everything leave 7 bits it becomes FC in hex.
What three types of transmission does IPv6 use?
Unicast, One-to-one. Multicast, One-to-Multiple-others. Anycast, one-to-one-of-many.
What Unique local addresses used for/similar too?
Unique local addresses are IPv6 addresses used in an internal network. Similar to IPv4 private manually done IP addresses. Unique local addresses are identified by the first seven bits as 1111 110. Additionally, the 8th bit is always a 1.
You need to assign IPv6 addresses to hosts on a private network. You should use _____________ addresses.
Unique local addresses. Unique local addresses are assigned to hosts on private networks.
How many groups of hexadecimal numbers are in a IPv6 address and what separates each group?
When a full IPv6 address is displayed, it will include eight groups of four hexadecimal numbers, separated by colons similar to this : fe80:0000:0000:0000:0184:e9f8:a71b:0304
How can you tell if you're on a terdo client?
You can tell whether your system is using Teredo by entering ipconfig / all at the command prompt. Teredo address assigned. A terodo enabled pc is best know for the prefix 2001:0.
IPv4 addresses use public address on the Internet. IPv6 uses _____________ addresses on the Internet.
global unicast. Global unicast addresses are used on the Internet. They have a prefix of 2.
What do link local addresses always start with?
link local addresses always start with fe80.
What other methods make an EUI? (Interface Identifier?)
▶A randomly generated temporary identifier ▶A randomly generated permanent identifier ▶ A manually assigned identifier
