Quiz: IPv4 and Network Segmentation

Question 1

Why does a unit have a Source IP address and a Destination IP address?

Answer 1

The source IP address is the device’s address that originated the data or request. The destination IP address is the device’s address to which the data or request is sent.

Question 2

Unicast transmission

Answer 2

One device sending a message to one other device in one-to-one communications. Note: the destination IP does not have to be unicast in order to receive but the source IP dose have to be unicast

Question 3

Broadcast

Answer 3

a device sending a message to all the devices on a network in one-to-all communications. Note: Broadcasting is network intensive with and should be limited or subdivided.

Question 4

Multicast packet

Answer 4

A packet with a destination IP address that is a multicast address.

Question 5

Multicast

Answer 5

Hosts that receive particular multicast packets are called multicast clients. The multicast clients use services requested by a client program to subscribe to the multicast group

Question 6

Public IPv4

Answer 6

Addresses which are globally routed between internet service provider (ISP) routers. Some of these addresses will just be used localy.

Question 7

World Wide Web (WWW)

Answer 7

Private IPv4 addresses are not unique and can be used internally within any network

Question 8

Network Address Translation (NAT)

Answer 8

NAT is used to translate between private IPv4 and public IPv4 addresses. This is usually done on the router that connects the internal network to the ISP network. Private IPv4 addresses in the organization’s intranet will be translated to public IPv4 addresses before routing to the internet.

Question 9

Automatic Private IP Addressing (APIPA)

Answer 9

They are used by a Windows client to self-configure in the event that the client cannot obtain an IP addressing through other methods.

Question 10

Loopback addresses

Answer 10

These are special addresses used by a host to direct traffic to itself. For example, the ping command is commonly used to test connections to other hosts. But you can also use the ping command to test if the IP configuration on your own device, as shown in the figure.

Question 11

Automatic Private IP Addressing (APIPA)

Answer 11

are used by a Windows client to self-configure in the event that the client cannot obtain an IP addressing through other methods. Link-local addresses can be used in a peer-to-peer connection but are not commonly used for this purpose.

Question 12

Internet Assigned Numbers Authority (IANA)

Answer 12

The IANA manages and allocates blocks of IP addresses to the Regional Internet Registries (RIRs)

Question 13

What is the US RIR?

Answer 13

ARIN (American Registry for Internet Numbers) - North America Region

Question 14

Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?

Answer 14

RIRs

Question 15

Address Resolution Protocol (ARP)

Answer 15

ARP sends Layer 2 broadcasts to a known IPv4 address on the local network to discover the associated MAC address. Devices on Ethernet LANs also locate other devices using services.

Question 16

What happens when a router receives a broadcast?

Answer 16

Routers do not propagate broadcasts. Each router interface connects to a broadcast domain and broadcasts are only propagated within that specific broadcast domain.

Question 17

What are the downsides of a large broadcast domain?

Answer 17

A problem with a large broadcast domain is that these hosts can generate excessive broadcasts and negatively affect the network. This results in slow network operations due to the significant amount of traffic it can cause and slow device operations because a device must accept and process each broadcast packet.

Question 18

What are the improvements of Subnetting?

Answer 18

Reduces overall network traffic and improves network performance, implements security policies, and reduces the number of devices.

Question 19

Why does Multicast transmission reduce traffic?

Answer 19

Multicast transmission reduces traffic by allowing a host to send a single packet to a selected set of hosts that subscribe to a multicast group

Question 20

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

Answer 20

router

Question 21

Which two situations are the result of excessive broadcast traffic?

Answer 21

slow network operations & slow device operations

Question 22

Which statement describes one purpose of the subnet mask setting for a host?

Answer 22

It is used to determine to which network the host is connected.

Question 23

What is one reason for subnetting an IP network?

Answer 23

to reduce the scope of broadcast flooding

Question 24

A message is sent to all hosts on a remote network. Which type of message is it?

Answer 24

directed-broadcast

Question 25

A user is unable to access the company server from a computer. On issuing the ipconfig command, the user finds that the IP address of the computer is displayed as 169.254.0.2. What type of address is this?

Answer 25

link-local

Question 26

Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

Answer 26

router

Question 27

What is the role of IANA?

Answer 27

managing the allocation of IP addresses and domain names

Question 28

Which address prefix range is reserved for IPv4 multicast?

Answer 28

224.0.0.0 – 239.255.255.255

Question 29

A high school in New York (school A) is using videoconferencing technology to establish student interactions with another high school (school B) in Russia. The videoconferencing is conducted between two end devices through the internet. The network administrator of school A configures the end device with the IP address 209.165.201.10. The administrator sends a request for the IP address for the end device in school B and the response is 192.168.25.10. Neither school is using a VPN. The administrator knows immediately that this IP will not work. Why?

Answer 29

This is a private IP address.

Question 30

A host is transmitting a broadcast. Which host or hosts will receive it?

Answer 30

all hosts in the same network