Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CCNA > Network Fundamentals - IPv6 > Flashcards

Network Fundamentals - IPv6 Flashcards

1
Q

The IPv6 routing protocols

A
  • RIPng (RIP next generation)
  • OSPFv3
  • EIGRPv6
  • MP BGP-4 (Multiprotocol BGP version 4)

Note: See Table 28-2, pg. 679, Chapter 28 of the ICND1 Study Guide.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The IPv6 equivalent of a subnet ID

A

IPv6 prefix

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The number of bits in an IPv6 address

A

128 bits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Rules for finding an IPv6 prefix when given an address and the prefix length

A

If the prefix length is ‘P’:

  1. Copy the first ‘P’ bits
  2. Change the rest of the bits to 0

Note: Four bits equals one hex digit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A method for abbreviating IPv6 addresses

A

Remove all leading zeros and replace the longest string of leading zeros with a double colon (::)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A reserved block of publicly-routable IPv6 addresses that a company reserves from an ISP or Internet registry

A

A “global routing prefix”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The IPv6 equivalent of a private IPv4 address

A

Unique local address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The IPv6 equivalent of a public IPv4 address

A

Global unicast address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The 4 main types of IPv6 addresses

A
  1. Global unicast
  2. Unique local
  3. Multicast
  4. Link local

Note: See Table 29-2, pg. 695, Chapter 29 of the ICND1 Study Guide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The starting hex digits of a ‘link-local’ IPv6 address

A

FE80

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The starting hex digits of a ‘multicast’ IPv6 address

A

FF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The starting hex digits of a ‘unique local’ IPv6 address

A

FD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The starting hex digits of a ‘global unicast’ IPv6 address

A

Any hex digits that are not otherwise reserved (most commonly 2 or 3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The most common IPv6 prefix length

A

/64

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The 3 parts of a subnetted IPv6 address

A
  1. Global routing prefix
  2. Subnet ID
  3. interface ID
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The formal name for an IPv6 subnet ID

A

Subnet router anycast address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The rules for creating an IPv6 unique local address

A
  1. Use FD as the first two hex digits
  2. Choose a unique 40-bit global ID
  3. Append the global ID to FD to create a 48-bit prefix, used as the prefix for all your addresses
  4. Use the next 16 bits as a subnet field
  5. The final 64 bits are used for the interface ID
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The practice of using both IPv4 and IPv6 in a network

A

Dual-stack routing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The IPv6 protocol used by hosts to learn information about their local link (subnet)

A

Neighbor Discovery Protocol (NDP)

Note: See pg. 730 - 735 of the ICND1 Study Guide for more information.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The IPv6 addressing functions associated with NDP

A
  • SLAAC
  • Router Discovery
  • Duplicate Address Detection (DAD)
  • Neighbor MAC Discovery

Note: See Table 31-2 on pg. 735 of the ICND1 Study Guide.

21
Q

The NDP messages used by hosts to learn addressing and subnet information from any router on the subnet

A
  • Router Solicitation (RS)
  • Router Advertisement (RA)

Note: See pg. 731 of the ICND1 Study Guide for more information.

22
Q

The NDP message used by hosts to learn the MAC addresses of other hosts on the link

A

Neighbor Solicitation (NS)

Note: See pg. 733 of the ICND1 Study Guide for more information.

23
Q

The NDP message used by hosts to reply to a request for their MAC address

A

Neighbor Advertisement (NA)

Note: See pg. 733 of the ICND1 Study Guide for more information.

24
Q

The IPv6 multicast address that unsolicited NA messages are sent to

A

FF02::1 (all-IPv6-hosts local-scope)

25
Q

A function that uses NS and NA messages to make sure no other host on the link is already using an address; avoiding duplicate addresses

A

Duplicate Address Detection (DAD)

Note: See pg. 734-735 of the ICND1 Study Guide for more information.

26
Q

The ways in which DHCPv6 can be used

A
  • Stateful DHCP

- Stateless DHCP

27
Q

The information not supplied to hosts by DHCPv6

A

Default router information

28
Q

The four types of DHCPv6 messages

A
  • Solicit
  • Advertise
  • Request
  • Reply
29
Q

A process that generates the interface ID portion of an IPv6 address, using an interface’s MAC address

A

EUI-64 (extended unique identifier)

Note: If an interface does not have a MAC address, the router chooses the MAC of the lowest-numbered router interface that does have a MAC

30
Q

The two ways that a router can dynamically learn an IPv6 address

A
  1. Stateful DHCP

2. Stateless Address Autoconfiguration (SLAAC)

31
Q

The steps that a router goes through after an IPv6 address is configured on an interface

A

The router:

  • Gives the interface a unicast IPv6 address
  • Enables the routing of IPv6 packets in/out that
    interface
  • Defines the IPv6 prefix (subnet) that exists off that
    interface
  • Tells the router to add a connected IPv6 route for that
    prefix, to the IPv6 routing table, when that interface is
    up/up
32
Q

A type of IPv6 address that is not used for normal IPv6 packet flow; used for some overhead protocols and for routing

A

link-local address

Note: IOS creates a link-local address for any interface that has configured at least one other unicast address using the “ipv6 address” command.

33
Q

The properties of link-local addresses

A

These addresses are:

  • Unicast (not multicast)
  • Forwarding scope is the local link (subnet) only
  • Usually generated automatically
    • First half is always FE80:0000:0000:0000
    • Second half is generated using EUI-64

Note: Can also be statically configured on

34
Q

Some common uses for link-local addresses

A
  • Used by some overhead protocols that stay local to one subnet
  • Used as the next-hop address for IPv6 routes
35
Q

The two types of IPv6 multicast addresses

A
  • Link-local multicast addresses

- Solicited-node multicast addresses

36
Q

Properties of a link-local multicast address

A
  • Link-local scope: Routers do not forward packets sent to this address
  • Used for communicating over a single link
  • Have preset values; each address corresponds to a different type/group of noes on a link (subnet)
    • Example: FF02::2 is the address for all routers on the link
    • See Table 30-3 on pg. 720 for a table showing common
    local-scope addresses
37
Q

Properties of a solicited-node multicast address

A
  • Link-local scope: Routers do not forward packets sent to this address. Each host on the link has a different address.
  • Calculated: Address is calculated based on the last 6 hex digits of the host’s unicast IPv6 address
    • Hosts with the same last 6 digits of their unicast address
    will have the same address.
  • Operation: Each host interface must listen for packets sent to its address
  • Overlap: Some hosts might have the same multicast address
38
Q

The prefix for all solicited-node multicast addresses

Note: See Figure 30-11 for an example of the format for these addresses.

A

FF02::1:FF/104

39
Q

An address that is assigned to multiple routers; packets sent to this address are routed to the nearest router configured with the address. Generally used to support some kind of service that works best when offered by multiple routers.

A

Anycast address

Note: See pg. 722 of the ICND1 Study Guide for more information.

40
Q

The IPv6 loopback address

A

::1/128

41
Q

The unknown(unspecified) IPv6 address.

A

:: (all 0s)

Note: When a host doesn’t yet know what IPv6 address to use, it can use the :: address as its source IPv6 address.

42
Q

A special anycast address in each subnet that is reserved for use by routers as a way to send a packet to any router on the subnet

A

Subnet router anycast address

43
Q

The command for configuring and IPv6 address on a router interface

A

“ipv6 address” + address/prefix length

Note: Both the abbreviated and full versions of the address can be used with this command.

44
Q

The process for how EUI-64 generates the Interface ID portion of an IPv6 host address

A
  1. Split the 6-byte (12-hex-digit) MAC address in two halves
  2. Insert FFFE in between the two, making the interface ID now have a total of 16 hex digits (64 bits)
  3. Invert the seventh bit of the interface ID

Note: See Figure 30-4 on pg. 711 and Example 30-5 on pg. 712 of the ICND1 Study Guide for an example.

45
Q

The command used to configure an IPv6 address on a router interface, using EUI-64 rules

A

“ipv6 address” + address prefix/prefix length “eui-64”

46
Q

The steps a host, using SLAAC, goes through to choose its own IPv6 address

A
  1. Learn the IPv6 prefix used on the link, using NDP RS/RA messages.
  2. Choose its own IPv6 address by making up the interface ID value to follow the IPv6 prefix.
  3. Before using the address, first use DAD to make sure that no other host is already using the same address.

See pg. 740 of the ICND1 Study Guide for more information.

47
Q

The commands that can be used on a host to test IPv6 host connectivity

A
  • ping

- traceroute

48
Q

The router commands used to verify IPv6 host connectivity

A
  • ping
  • traceroute
  • show ipv6 neighbors
  • clear ipv6 neighbor
  • show ipv6 routers

Note: See pg. 744-746 of the ICND1 Study Guide for more information.

CCNA (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions