IPv4 Addressing

Question 1

What are the possible first octet values of a Class A network?

Answer 1

1-127

Question 2

What is the Default Subnet Mask of a Class A network?

Answer 2

255.0.0.0

Question 3

How many possible hosts can there be on a Class A network?

Answer 3

16.7 million

Question 4

What is the CIDR Notation for a Class A network?

Answer 4

/8

Question 5

What are the possible first octet values of a Class B network?

Answer 5

128-191

Question 6

What is the Default Subnet Mask of a Class B network?

Answer 6

255.255.0.0

Question 7

How many possible hosts can there be on a Class B network?

Answer 7

65,536

Question 8

What is the CIDR Notation for a Class B network?

Answer 8

/16

Question 9

What are the possible first octet values of a Class C network?

Answer 9

192-223

Question 10

What is the Default Subnet Mask of a Class C network?

Answer 10

255.255.255.0

Question 11

How many possible hosts can there be on a Class C network?

Answer 11

256

Question 12

What is the CIDR Notation for a Class C network?

Answer 12

/24

Question 13

What are the possible first octet values of a Class D network?

Answer 13

224-239

Question 14

What are the possible first octet values of a Class E network?

Answer 14

240-255

Question 15

How many possible hosts can there be on a Class E network?

Answer 15

268 million, which are all reserved for experimental purposes

Question 16

Multicast Address

Answer 16

Logical identifier for a group of hosts in a computer network (like a group chat)

Question 17

Classful Mask

Answer 17

Default subnet mask for a given class of IP addresses

Question 18

Classless Inter-Domain Routing

Answer 18

Allows for the borrowing of some of the host bits and reassigning them to the network portion of the subnet mask

Question 19

Subnetting

Answer 19

Allows for the use of a classless subnet mask to create smaller networks with fewer hosts in each network
Process is called CIDR (Classless Inter-Domain Routing) Notation

Question 20

ICANN

Answer 20

Internet Corporation for Assigned Names and Numbers
Globally manages and leases publicly routable IP addresses

Question 21

ARIN

Answer 21

North America IP addresses

Question 22

LACNIC

Answer 22

Latin America IP addresses

Question 23

AFNIC

Answer 23

Africa IP addresses

Question 24

APNIC

Answer 24

Asia Pacific IP addresses

Question 25

RIPE

Answer 25

Europe IP addresses

Question 26

NAT

Answer 26

Network Address Translation Allows for routing of private IPs through a public IP

Question 27

RFC 1918

Answer 27

Used to document how organizations could conduct address allocation for private internets (intranet)

Question 28

What is the IP range for a Private Class A network?

Answer 28

10.x.x.x

Question 29

How many possible hosts can a Private Class A Network have?

Answer 29

16.7 million

Question 30

What is the IP range for a Private Class B Network?

Answer 30

172.16.x.x - 172.31.x.x

Question 31

How many possible hosts can a Private Class B Network have?

Answer 31

1.05 million

Question 32

What is the IP range for a Private Class C Network?

Answer 32

192.168.x.x

Question 33

How many possible hosts can a Private Class C Network have?

Answer 33

65,536

Question 34

Loopback Address

Answer 34

127.0.0.1 Creates a loopback to the host and is often used in troubleshooting and testing network protocols on a system. Also called localhost "There's no place like 127.0.0.1"

Question 35

APIPA

Answer 35

Automatic Private IP Addresses Used when a device does not have a static IP address or cannot reach a DHCP server 169.254.x.x

Question 36

Virtual IP Address

Answer 36

IP address that does not correlated to an actual physical network interface Usually used for NAT, fault tolerance, virtualization Routers often use VIP to provide redundancy in their connectivity options

Question 37

Subinterfaces

Answer 37

Virtual interface that is created by dividing up one physical interface into multiple logical interfaces

Question 38

Unicast

Answer 38

Data travels from a single source to a single destination

Question 39

Broadcast

Answer 39

Data travels from a single source device to ALL devices on a destination network

Question 40

Multicast

Answer 40

Data travels from a single source to multiple (but specific) destination devices

Question 41

Static IP Assignment

Answer 41

Manually typing in IP address, subnet mask, default gateway, and DNS server Time consuming, prone to error, impractical on large enterprise networks

Question 42

Dynamic IP Assignment

Answer 42

Dynamic allocation of IP addresses

Question 43

DNS

Answer 43

Domain Name System Converts domain names used by a website to the IP address of its server

Question 44

Windows Internet Name Service (WINS)

Answer 44

Identifies NetBIOS systems on a TCP/IP network and converts those NetBIOS names to IP addresses

Question 45

Bootstrap Protocol (BOOTP)

Answer 45

Dynamically assigns IP addresses and allows a workstation to load a copy of their boot image over the network Oldest method of dynamic assignment, least used

Question 46

DHCP

Answer 46

Dynamic Host Configuration Protocol Assigns an IP based on an assignable scope or pool of addresses and provides the ability to configure numerous other options within it IPs leased for a period of time and returns to the pool when lease expires

Question 47

How many subnets are in a /24 network? How many IPs?

Answer 47

1 subnet 256 IPs

Question 48

How many subnets are in a /25 network? How many IPs?

Answer 48

2 subnets 128 IPs

Question 49

How many subnets are in a /26 network? How many IPs?

Answer 49

4 subnets 64 IPs

Question 50

How many subnets are in a /27 network? How many IPs?

Answer 50

8 subnets 32 IPs

Question 51

How many subnets are in a /28 network? How many IPs?

Answer 51

16 subnets 16 IPs

Question 52

How many subnets are in a /29 network? How many IPs?

Answer 52

32 subnets 8 IPs

Question 53

How many subnets are in a /30 network? How many IPs?

Answer 53

64 subnets 4 IPs