Identifying Classes & Types of IPv4 Addresses Pt 1

Question 1

Dotted Decimal Notation

Answer 1

The conversion of binary into a shortened form for human understanding. This is how we form IP addresses. 2.234.1.196

Question 2

Multicast Addressing

Answer 2

Must start with a 1110xxxx

1110xxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx

Question 3

Broadcast Addressing

Answer 3

All 1’s means you are broadcasting an open message to anyone
Domain broadcast - Any.11111111.11111111.11111111
General broadcast - 11111111.11111111.etc (255.255.255.255)

Question 4

Unicast Addressing

Answer 4

One to One communication
All other patterns that do NOT start with 00000000
Exa: 00000001.00101011.00000000.00000000

Question 5

Classes of IPv4

Answer 5

When it became apparent that 255 networks would not be enough, more classes of network domains were introduced. This was the beginning of IPv4.

Class A: Starts with 0xxxxxxx - 0.0.0.0 through 127.255.255.255
Class B: Starts with 10xxxxxx - 128.0.0.0 - 191.255.255.255
Class C: Starts wit 110xxxxx - 192.0.0.0 - 223.255.255.255
Class D: Starts with 101xxxxx - 224.0.0.0 - 239.255.255.255
Class E: Starts with 1110xxxx - 240.0.0.0 - 255.255.255.255 (Reserved as experimental ranges - has not/will not be utilized)

Note: 127 ranges is considered as a loopbacks
Note: 169.254 ranges are considered as APIPA

Question 6

Loopback Addresses

Answer 6

127.x.x.x
This is essentially a test message IP. Its as if you are talking to yourself to check if your send/receive functions are working properly.

Question 7

IPv4 Class A

Answer 7

Starts with 0xxxxxxx - 0.0.0.0 through 127.255.255.255

Question 8

IPv4 Class B

Answer 8

Starts with 10xxxxxx - 128.0.0.0 - 191.255.255.255

Question 9

IPv4 Class C

Answer 9

Starts wit 110xxxxx - 192.0.0.0 - 223.255.255.255

Question 10

IPv4 Class D

Answer 10

Starts with 101xxxxx - 224.0.0.0 - 239.255.255.255

Question 11

IPv4 Class E

Answer 11

Starts with 1110xxxx - 240.0.0.0 - 255.255.255.255 (Reserved as experimental ranges - has not/will not be utilized)