2.5 – Other Types of IP Addresses

Question 1

Unicast

Answer 1

One-to-One communication

• Public IP = routable IP addresses assigned by an ISP
• Private IP = non-routable IP addresses

Question 2

Unicast: APIPA

Answer 2

Automatic Private IP Addresses

• Self-assigned by a host when DHCP is not available
• Generally, an error [tried to get IP from DHCP but failed]
• Will NOT have internet access & NOT be able to access any files
• NO LAN access

Question 3

Unicast Range

Answer 3

IP address range =

169.254.0.0 – 169.254.255.255

Question 4

Multicast

Answer 4

One to MANY communication

• Routers use to update multiple routers
• EX: router tells other routers about updates it receives
• You DON’T assign IPs to Class D
• Routers assign IPs then talk from 1 router to many routers

Question 5

Multicast Range

Answer 5

IP address range =

224.0.0.0 – 239.255.255.255

Question 6

Broadcast [Layer 3]

Answer 6

One to EVERYONE communication

• Computer needs to send a message to everyone on the network
• LAST IP in the range
• ABSOLUTE LAST IP in the range [usually 255]

Question 7

Broadcast [Layer 3] - ARP

Answer 7

Address Resolution Protocol

Translate IP address to MAC address

Question 8

Broadcast [Layer 3] Range

Answer 8

IP address Range =

192.168.30.255 / 24

Question 9

Broadcast [Layer 3]:

How to get a Broadcast IP address

Answer 9

IP Address: 172.30.6.4 / 16

Subnet Mask: 255.255.0.0

NID: 172.30.0.0

BIP: 172.30.255.255 [LAST IP in the range]