IPV4 Addressing

Question 1

What address is 127.0.0.1 ?

Answer 1

Local host. Address of home Computer.

There’s no place like 127.0.0.1

Question 2

255 in binary

Answer 2

1111 1111

Question 3

What does APIPA stand for ?

Answer 3

Automatic Private IP Addressing.

Question 4

Broadcast Address

Answer 4

Used if you want to send a packet to all devices on the network.
The last available IP address within your scope is reserved for this.

Question 5

How many Network and Host bits in a Class A network.

Answer 5

Network = 8 bits
Host = 24 bits

Question 6

Class A network subnet mask

Answer 6

255.0.0.0

Question 7

Class A network octet range

Answer 7

1 - 127

1.0.0.0 - 127.0.0.0

Question 8

Class A network private addresses

Answer 8

10.0.0.0 - 10.255.255.255

Question 9

How many Network and Host bits in a class B network ?

Answer 9

Network = 16
Host = 16

Question 10

Class B network subnet mask

Answer 10

255.255.0.0

Question 11

Class B Octet range

Answer 11

128 - 191

Question 12

Class B private Addresses

Answer 12

172.16.0.0 - 172.31.0.0

Question 13

Network and Host bits in a Class C network

Answer 13

Network = 24
Host = 8

Question 14

Class C Subnet Mask

Answer 14

255.255.255.0

Question 15

Class C Network octet range

Answer 15

192 - 223

Question 16

Class C Private Addresses

Answer 16

192.168.0.0 - 192.168.255.254

Question 17

Class D octet range

Answer 17

224 - 239

Question 18

Class E octet range

Answer 18

240 - 255

Question 19

Formula for how many hosts on a network

Answer 19

2 to the power of N-2

2n -2

Question 20

Formula for how many network addresses in network class

Answer 20

2 to the power of N

2n

Question 21

How is an IPv4 address written

Answer 21

As a dotted quad.
4 number separated by full stops
e.g. 192.168.112.20

Question 22

How many unique hosts can a Class C network have?

Answer 22

254

Question 23

How many IPv4 addresses are reserved and not available to the public ?

Answer 23

Around 600 million

Question 24

Roughly how many IPv4 addresses are there?

Answer 24

Around 4 billion

Question 25

In what way is IPv4 limited?

Answer 25

There are not enough unique addresses for everyone on the planet.

Question 26

What addresses are reserved for loopback

Answer 26

127.0.0.1 - 127.255.255.254

Question 27

What are some uses of IP addresses that make them unavailable to the public?

Answer 27

Private Addressing Testing Documentation

Question 28

What is CIDR ?

Answer 28

Classless Inter Domain Routing When you add a /# e.g /24 at the end of an IP address to let you know how many numbers in the IP address are in the network bit. In this case 24 bits.

Question 29

What is an IP address used for ?

Answer 29

Uniquely identifying a device on a network.

Question 30

Why is a 32-bit IPv4 Address written as a dotted quad?

Answer 30

To improve readability for humans. | The computer converts this number into binary using a 32-bit long string of 1's and 0's

Question 31

What do Subnet Masks do ?

Answer 31

Distinguish the Network portion from the Host portion on an IP address

Question 32

What are Class D hosts uses for ?

Answer 32

Multicast

Question 33

What are Class E hosts used for

Answer 33

Reserved for research purposes, military etc | They are kept hidden from the general public.

Question 34

What Automatic Private IP Addressing addresses are not available to the public

Answer 34

169.254.0.0 to 169.254.255.255

Question 35

1111 1111 in Decimal

Answer 35

255

Question 36

``` Address class reserved for research purposes, military etc They are kept hidden from the general public. ```

Answer 36

Class E

Question 37

Address class used for Multicast ?

Answer 37

Class D

Question 38

Distinguishes the Network portion from the Host portion

Answer 38

Subnet Masks

Question 39

What class of network has the octet range 240 - 255

Answer 39

Class E

Question 40

What class of network has the octet range 224 - 239

Answer 40

Class D

Question 41

What are the addresses 192.168.0.0 - 192.168.255.254

Answer 41

Private Class C addresses

Question 42

What class of network has the addresses 192 - 223

Answer 42

Class C

Question 43

What are the addresses 172.16.0.0 - 172.31.0.0

Answer 43

Class B private Addresses

Question 44

What class of network has the address range 128 - 191

Answer 44

Class B

Question 45

Used if you want to send a packet to all devices on the network. The last available IP address within your scope is reserved for this.

Answer 45

Broadcast address

Question 46

169.254.0.0 to 169.254.255.255

Answer 46

APIPA Addresses | Automatic Private IP Addressing

Question 47

Binary 1 in the subnet mask =

Answer 47

A network bit

Question 48

Binary 0 in the subnet mask =

Answer 48

A host bit

Question 49

The first valid host on a network is usually given to what device ?

Answer 49

A router

Question 50

What device usually gets the last valid host on a network ?

Answer 50

The Server