IP Addressing

Question 1

what is the Class A IP range?

Answer 1

1-126

Question 2

What is the Class B IP range?

Answer 2

128-191

Question 3

What is the Class C network range?

Answer 3

192-223

Question 4

What is the Class A private range?

Answer 4

10.0.0.0 - 10.255.255.255

Question 5

Name the Class B private range

Answer 5

172.16.0.0 - 172.31.255.255

Question 6

Name the Class C private range

Answer 6

192.168.0.0 - 192.168.255.255

Question 7

What is the APIPA valid host range?

Answer 7

169.254.0.1 - 169.254.255.254

Question 8

What does a host address of all 0’s mean?

Answer 8

designates the network, or any host on that network

Question 9

what does a host address of all 1’s mean?

Answer 9

designates all hosts on a network

Question 10

network address of all 0’s means?

Answer 10

this network

Question 11

network address of all 1’s means?

Answer 11

all networks

Question 12

entire IP address set to 0’s means what?

Answer 12

used by cisco routers to designate default route

Question 13

ip address of all 1’s is reserved for what?

Answer 13

to broadcast to all hosts on the current network

Question 14

easiest way to find out the valid hosts on a network?

Answer 14

1) turn all the host bits off; that gives the network address
2) turn all the host bits on; that gives the broadcast address.
3) the valid hosts sit between the network address and broadcast address

Question 15

Class A address always has the first bit set to what?

Answer 15

zero

Question 16

Class B network address always starts with what?

Answer 16

10

Question 17

What address range starts with 11 as the first two bits?

Answer 17

Class C

Question 18

Multicast address use what IP address range?

Answer 18

224-239

Question 19

Name 2 features of multicasting

Answer 19

1) packets are sent only to subscribed hosts

2) routers will forward multicast packets

Question 20

You want a public facing IPv6 interface, what kind of address do you use?

Answer 20

Global Unicast Address

Question 21

What is the IPv6 equivalent of a private IPv4 address range?

Answer 21

Unique Local Address

Question 22

You want to quickly set up a local IPv6 network to share resources between a few computers, what addresses type would you give them?

Answer 22

Link-local addresses

Question 23

What IPv6 address type is known as one to nearest addressing?

Answer 23

Anycast

Question 24

How long is an IPv6 address?

Name the 2 sections that typically make up an IPv6 address?

Answer 24

1) Global Prefix and Subnet (64-bit)

2) Interface ID (64-bit)

Question 25

You have old legacy infrastructure and can't afford to upgrade everything to IPv6. What strategy could you employ to allow IPv4 devices make use of IPv6?

Answer 25

Dual Stacking

Question 26

You need your IPv6 network to communicate with another IPv6 network over an IPv4 network. How do you do this?

Answer 26

6to4 tunnelling

Question 27

When would you use Teredo?

Answer 27

If you had get IPv6 packets over an IPv4 network that has NAT

Question 28

What is the link-local unicast IPv6 range?

Answer 28

FE80::/10

Question 29

What is the IPv6 multicast range?

Answer 29

FF00::/8

Question 30

What is the IPv6 global unicast address range allocated for internet access?

Answer 30

2000:/3

Question 31

What address range is used for 6to4 tunnellings?

Answer 31

2002::/2

Question 32

What address range is this, FE80::/10?

Answer 32

Link-local unicast

Question 33

What address range is this, FF00::/8?

Answer 33

IPv6 multicast

Question 34

Name this address range, 2002::/2?

Answer 34

IPv6 6to4 tunelling range

Question 35

Name this address range 2000:/3

Answer 35

IPv6 Global unicast range

Question 36

What type of IPv6 address is equivalent to an APIPA address in its function and cannot be routed AT ALL?

Answer 36

link-local address

Question 37

What is Miredo?

Answer 37

tunnelling technique used on native IPv6 Linux and BSD machines to communicate on the IPv4 internet directly without needing a dual stack router

Question 38

APIPA address lie in what Class range?

Answer 38

Class B

Question 39

What class of addresses use the range 224-229?

Answer 39

Class D, multicast

Question 40

What address range is for scientific purposes only and not a valid host address?

Answer 40

240-255

Question 41

in an IPv6 address, a double colon can only be used once to represent a block of all zeros. TRUE or FALSE?

Answer 41

TRUE

Question 42

Stateless auto-configuration allows devices on a network to what?

Answer 42

to address themselves with a link-local or global unicast address.

Question 43

What 16-bit hex value is inserted into a MAC address to create an EUI-64 address? After which bit, counting from the left, is it inserted?

Answer 43

FF:FE | Bit 24 or a block and a half in from the left

Question 44

which bit should be flipped when converting a 48-bit MAC address to a 64-bit EUI?

Answer 44

The 7th bit.

Question 45

List (8) in order the subnet mask decimal values e.g. 10000000 = 11000000 =

Answer 45

``` 128 192 224 240 248 252 254 255 ```

Question 46

What is the minimum number of bits required for the host portion of an address?

Answer 46

2

Question 47

``` List how many valid hosts can be obtain for each borrowed bit in the pattern below: 1-bit 2-bits 3-bits 4-bits 5-bits 6-bits 7-bits 8-bits ```

Answer 47

``` 1-bit - invalid 2-bits - 2 (calc = 2*2-2) 3-bits - 6 (calc = 2*2*2-2) etc 4-bits - 14 5-bits - 30 6-bits - 62 7-bits - 126 8-bits - 254 ```

Question 48

What is the calculation to work out the valid subnets/block size?

Answer 48

subtract the subnet mask from 256 e.g. if a subnet has 4 borrowed bits then it would be 256-240=16

Question 49

What is Static NAT?

Answer 49

A type of network address translation that allows one-to-one mapping between local and global addresses. You'll need one real internet address for each host on the network.

Question 50

Which type of NAT is also known as Port Address Translation? How does it work?

Answer 50

NAT Overload. It works by allowing multiple private IP addresses to use just a single public IP by using source and destination ports to forward data from the internet to host machines