Module 11 IPv4 Addressing

Question 1

Used to identify the network/host portion of the IPv4 address.

Answer 1

Subnet mask

Question 2

An address that represents a specific network.

Answer 2

Network address

Question 3

Addresses that can be assigned to a device such as a computer, laptop, smart phone, webcam, etc.

Answer 3

Host address

Question 4

An address that is used when it is required to reach all devices on an IPv4 network.

Answer 4

Broadcast address

Question 5

One device sending a message to one other device in one-to-one communications.

Answer 5

Unicast transmission

Question 6

A device sending a message to all the devices on a network in one-to-all communications

Answer 6

Broadcast transmission

Question 7

The broadcast IPv4 address for a network; the highest address in the network. A host can send data to all hosts in a network with this address in a single packet.

Answer 7

IP directed broadcast address

Question 8

Sends a single packet to a selected set of hosts that subscribe to a group.

Answer 8

Multicast transmission

Question 9

The range of IP addresses reserved for multicast packets.

Answer 9

224.0.0.0 to 239.255.255.255

Question 10

Routing protocol that uses multicast transmissions

Answer 10

OSPF (244.0.0.5)

Question 11

Also referred to as RFC 1918 address space

Answer 11

Private IPv4 addresses

Question 12

Most internal networks use this type of address for addressing all internal devices.

Answer 12

private IPv4 address

Question 13

Used to translate between private IPv4 and public IPv4 addresses.

Answer 13

Network Address Translation (NAT)

Question 14

This organization does not consider private IPv4 addresses or NAT as effective security measures.

Answer 14

IETF

Question 15

Part of the network with public IPv4 addresses. Part of a company’s network containing resources available to the internet such as a web server.

Answer 15

Demilitarized zone (DMZ)

Question 16

Private Address Networks

Answer 16

10.0.0.0/8; 172.16.0.0/12; 192.168.0.0/16

Question 17

Special addresses used by a host to direct traffic to itself.

Answer 17

Loopback addresses; 127.0.0.1

Question 18

Special addresses used by the Windows DHCP client to self-configure in the event that there are no DHCP servers available.

Answer 18

Link-local addresses; Automatic Private IP Addressing (APIPA); self-assigned addresses

Question 19

Legacy method of assigning IPv4 addresses

Answer 19

Classful addressing with Class A (largest), B (medium), C (small networks)

Question 20

Organization that manages IPv4 and IPv6 addresses

Answer 20

Internet Assigned Numbers Authority (IANA)

Question 21

Responsible for allocating IP addresses to ISPs who provide IPv4 blocks to organizations and smaller ISPs.

Answer 21

Regional Internet Registries (RIRs)

Question 22

An area or group of switches that will forward and receive broadcasts. Does not include routers as they do not propagate broadcasts.

Answer 22

Broadcast domain

Question 23

What is a problem with large broadcast domains?

Answer 23

Hosts can generate excessive broadcasts and negatively affect the network, resulting in slow network operations.

Question 24

Reducing the size of a network to create smaller broadcast domains.

Answer 24

Subnetting

Question 25

Smaller network spaces from reducing a large networks.

Answer 25

Subnets

Question 26

The basis of subnetting:

Answer 26

Using host bits to create additional subnets (and increase the prefix length as a result)

Question 27

Which device will not forward an IPv4 broadcast packet by default?

Answer 27

router

Question 28

What two situations are the result of excessive broadcast traffic?

Answer 28

Slow network operations and slow device operations.

Question 29

The internal part of a company’s network, accessible only within the organization. Uses private IPv4 addresses.

Answer 29

Intranet

Question 30

When an organization must maximize its own limited number of public IPv4 addresses, requiring the network administrator to subnet their public address space into subnets with different-sized subnet masks, in order to minimize the number of unused host addresses per subnet.

Answer 30

Variable Length Subnet Masking (VLSM)