6.6

Question 1

The function of connecting multiple computers to the Internet (or any other IP network) using one or multiple routable IP addresses.

Answer 1

Network Address Translation (NAT)

Question 2

Which NAT type is designed to allow one-to-one mapping between local and global addresses?

Answer 2

Static NAT

Question 3

Which NAT type gives you the ability to map an unregistered IP address to a registered address from a pool of registered IP addresses?

Answer 3

Dynamic NAT

Question 4

What are some advantages of NAT?

Answer 4

• Enhanced level of security within the network by hiding its internal structure.
• Permits an almost unlimited number of users in a private network to access the Internet via a limited number of registered addresses.
• When an existing IP network is attached to the Internet, there is no need to replace the IP address of eacah and every device on the internal net.

Question 5

Also referred to as overloading, uses a network device that translates multiple local addresses to a single global address by keeping track of port assignments.

Answer 5

Port Address Translation (PAT)

Question 6

The successor to IPv4 providing 340 undecillion addresses that not onyl provides more addresses but also improves security by including IPsec.

Answer 6

IP version 6 (IPv6)

Question 7

An organizational method by which routers are assigned to the subnets of top tier routers.

Answer 7

Aggregration

Question 8

How long are IPv6 addresses?

Answer 8

128 bits (16 bytes) in length

Question 9

What are the three categories of IPv6 addresses?

Answer 9

• Unicast
• Multicast
• Anycast

Question 10

What type of IPv6 address uniquely identifies an interface of an IPv6 node?

Answer 10

Unicast address

Question 11

What type of IPv6 address is a single IP data packet set that represents a network host group?

Answer 11

Multicast address

Question 12

What type of IPv6 address are unicast addresses that are assigned to more than one interface and typically on different hosts?

Answer 12

Anycast address

Question 13

What are three Unicast Address Types?

Answer 13

Link-local, global, and unique local

Question 14

What type of Unicast Address are the equivalent of IPv4 APIPA addresses and used for temparary networks such as required for a testing environment or a quick connection between machines for transferring information?

Answer 14

Link-local unicast address

Question 15

What is the address prefix for a link-local address?

Answer 15

FE80::/10

Question 16

What represents a new standard for network inerface addressing where MAC addresses are extended to 64 bits?

Answer 16

64-bit Extended Unique Identifier (EUI-64)

Question 17

What type of Unicast Address are equivalent to IPv4 public addresses and are used for routing data across the Internet?

Answer 17

Global unicast address

Question 18

What is the address prefix for a global unicast address?

Answer 18

2000::/3

Question 19

What type of Unicast Address are the equivalent of IPv4 addresses used for private networks not connected to the Internet?

Answer 19

Unique unicast address

Question 20

What is the address prefix for a Unique Unicast address?

Answer 20

FC00::/7

Question 21

What enables a router to determine how broadly traffic should be propagated, so it is not sent outside its intended area of influence?

Answer 21

Scopes

Question 22

What is address prefix for a scope?

Answer 22

FF00::/8

Question 23

What is Scope ID Value 0?

Answer 23

Reserved Scope

Question 24

What is Scope ID Value 1?

Answer 24

Node-Local Scope

Question 25

What is Scope ID Value 2?

Answer 25

Link-Local Scope

Question 26

What is Scope ID Value 5?

Answer 26

Site-Local Scope

Question 27

What is Scope ID Value 8?

Answer 27

Organization-Local Scope

Question 28

What is Scope ID Value 14?

Answer 28

Global Scope

Question 29

What is Scope ID Value 15?

Answer 29

Reserved

Question 30

What is the process of loading both IPv4 and IPv6 on network nodes?

Answer 30

Dual stacking

Question 31

What can dual stack devices be configured to perform in order to change the packet headers of IPv6 and IPv4 for proper communication?

Answer 31

Translation

Question 32

What is the process by which IPv6 packets are encapsulated within IPv4 packets?

Answer 32

Tunneling

Question 33

What are three protocols discussed in class that are specific to IPv6?

Answer 33

ICMPv6, Neighbor Discovery Protocol (NDP), and DHCPv6

Question 34

What protocol determines hardware addresses for IPv6 hosts since ARP does not exist in IPv6 and is not really considered a protocol but rather a set of tools using different ICMPv6 messages?

Answer 34

Neighbor Discovery Protocol (NDP)

Question 35

What protocol handles functions that were handled by ARP and ICMP in IPv4 and also handles some new functions such as those in the NDP?

Answer 35

ICMPv6

Question 36

What are the nine NDP functions discussed in class?

Answer 36

• Router Discovery
• Prefix Discovery
• Parameter Discovery
• Address Autoconfiguration
• Address Resolution
• Next-Hop Determination
• Neighbor Unreachablility Detection
• Duplicate Address Detection
• Redirection

Question 37

What is it called when the learned prefix is combined with the EUI-64 address of the host’s interface?

Answer 37

Stateless autoconfiguration

Question 38

What are the two modes that DHCPv6 operate in?

Answer 38

Stateful and stateless

Question 39

What does SARR stand for?

Answer 39

Solicit, Advertise, Request, and Reply

Question 40

What three parts does a typical global unicast address consist of?

Answer 40

• Global Routing Prefix, S**ubnet ID*
• Interface ID*

Question 41

What are four types of tunneling mentioned in class?

Answer 41

6to4, 6in4, Tererdo, and ISATAP