Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Cisco Certs > IPv6 > Flashcards

IPv6 Flashcards

(64 cards)

Start Studying
1
Q

What does EUI stand for?

A

Extended Unique Identifier

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

What is the / range for IPv6 unique local address space?

A

FC00::/7

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

What do IPv6 link-local addresses start with?

A

FE80

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

What is the prefix range for link-local addresses?

A 
FE80::/10
FE80
FE90
FEA0
FEB0
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What method is used to create the link-local address for an interface?

A

FE80::/64 + EUI-64 interface ID

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

What do IPv6 multicast addressess start with?

A

FF

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

What is the IPv6 multicast range?

A

FF00::/8

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

What IPv6 multicast range is reserved for link local only?

A

FF02::/16

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

When a host wants to use DHCPv6 to get an IP, what source/destination addresses does it use?

A 
Source = it's link-local address
Destination = FF02::1:2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does SLAAC stand for?

A

StateLess Address AutoConfiguration

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

Command to set an IPv6 dhcp relay on an interface

A

conf t
int gi0/0
ipv6 dhcp relay destination DHCP server addr

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

What are 2 uses for link-local addresses?

A

Communication with directly connected neighbors

Routers use their neighbors link-local addresses as next hops in routing tables

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

3 steps for a host to get an IPv6 address using SLAAC

A
  1. Discover the v6 prefix on the link using NDP RS/RA messages.
  2. Create an interface ID and append it to the prefix.
  3. Test that it’s not a duplicate using DAD.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What address is an RS message sent to?

A

All-routers

FF02::2

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

When using SLAAC, how does a host come up with it’s interface ID?

A

Either using EUI-64 or coming up with a random value.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the all-host IPv6 address?

A

FF02::1

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

What 5 IPv6 functions use NDP?

A 
SLAAC
DAD
Router Discovery
Neighbor MAC Discovery
Prefix/length Discovery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the all-DHCP-agents multicast address?

A

FF02::1:2

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

What is the all-router IPv6 address?

A

FF02::2

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

Where would a host using SLAAC get the DNS server address?

A

From stateless DHCPv6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

4 major types of IPv6 addresses

A

Global Unicast
Unique local
Multicast
Link-local

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How does DAD work?

A

Host sends a NS message for it’s IPv6 address. If someone answers, must be a duplicate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Who primarily sends an RS message?

A

Hosts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

When are RA messages sent?

A

In response to a RS message
Or
Unsolicited, on a timer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What does NDP replace?
IPv4 ARP
26
If you really want to configure the link-local address, what is the syntax?
ipv6 address *local IPv6 addr* link-local
27
Command to statically configure an IPv6 address on an interface
conf t interface *int* ipv6 address *address/mask*
28
Command to have an interface use an EUI-64 address
ipv6 address *prefix*/64 eui-64
29
Command to have a router use SLAAC to dynamically get an IPv6 address
ipv6 address autoconfig
30
Command to have a router use DHCPv6 on an interface
ipv6 address dhcp
31
Command to enable a router to forward IPv6 packets
ipv6 unicast-routing
32
What is the scope of the solicited-node multicast address?
Link-local
33
In IPv6, what replaces ARP?
Neighbor discovery
34
What does NDP stand for?
Neighbor Discovery Protocol
35
What types of messages are used to find a neighbor's MAC address in IPv6?Using what protocol?
NS and NA | NDP
36
What are global unicast IPv6 addresses the equivalent of?
Public IPv4 addresses
37
What are the versions of the IGPs that support IPv6?
RIPng OSPFv3 EIGRPv6
38
What are unique local IPv6 addresses the equivalent of?
Roughly, RFC1918 addresses
39
What do RS and RA stand for?
Router Solicitation | Router Advertisement
40
Who primarily sends RA messages?
Routers
41
2 commands to see IPv6 interface information
show ipv6 interface brief | show ipv6 interace *interface*
42
DHCPv4 uses Discover/Offer/Request/Acknowledgement messages. What does DHCPv6 use?
Solicit - Host Advertise - Server Request - Host Reply - Server
43
When a host uses SLAAC, what crucial data is it missing?
the DNS server's address
44
When a router receives a link-local packet, what are the steps it takes to forward it out another interface?
Link local packets are not forwarded out other interfaces; they are scoped to a single link.
45
4 steps to creating an EUI-64 address
1. Take the MAC address of the interface, and split it in half. 2. Insert FF:FE into the middle of the MAC. 3. Invert the 7th bit of the the result from step 2. 4. Append this to the IPv6 prefix.
46
What are the 2 rules for shortening IPv6 addresses?
1. In each quartet, remove any leading 0's. | 2. For any single sequence of quartet's whos value is 0, collapse that sequence into ::
47
If an organization is allocated a /54, how many bits are available for subnets?
10
48
How many bits in an IPv6 address?How many bytes?
128 bits | 16 bytes
49
What's the size of the required section of the IPv6 header?
40 bytes
50
How many : delimited sections are there in an IPv6 address?
82340:1111:AAAA:0001:1234:5678:9ABC:1234
51
What is the 7th bit in the EUI-64 interface ID?
The universal/local bit.
52
Syntax to configure an IPv6 address on interface s0/0/0
conf t int s0/0/0 ipv6 address *ipv6 addr/mask*
53
Command to set an IPv6 static default route going out gi1/0
conf t | ipv6 route ::/0 gi1/0
54
Command to set an IPv6 static route
conf t | ipv6 route *network/mask* {*next hop IPv6* | *exit interface*}
55
Command to enable ipv6 globally
conf t | ipv6 unicast-routing
56
What does DAD stand for?
Duplicate Address Detection
57
When is a link local IPv6 address instantiated on a router's interface?
When another IPv6 address is configured or aqcuired on the same interface.
58
How are link-local addresses configured in the router?
They are automatically and self-generated.
59
What is the range of globally routable IPv6 addresses, in / notation.
2000::/3
60
What do the 2 options for the U/L bit signify?
0 = BIA MAC is being used1 = Locally administered address, ie BIA has been overwritten
61
What is one difference between DHCPv4 and v6 in terms of types of information supplied to the requesting host by the DHCP server.
DHCPv6 does not supply default router info. That is discovered by the host, using RS messages.
62
Name 2 ways for a router to get an IPv6 address dynamically
1. Stateful DHCP | 2. SLAAC
63
What's the most common IPv6 subnet mask for hosts or interfaces?
/64
64
What is the ethertype for IPv6
0x86DD

Cisco Certs (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions