Networking

Kinda like a street address, just cooler

• IP Address Classes (NOTE: if you look on the first terms of the ranges, the difference between two consecutive ones is 2^7-1, then 2^6, 2^5 and 2^4)

• Private Address Space:

• The first address of a subnet is the Network address, while the last one is the Broadcast.

Questions

1. How many categories of IPv4 addresses are there?

A: 5

1. Which type is for research? Looking for a letter rather than a number here

A: E

1. How many private address ranges are there?

A: 3

1. Which private range is typically used by businesses?

A: A

1. There are two common default private ranges for home routers, what is the first one?

A: 192.168.0.0

1. How about the second common private home range?

A: 192.168.1.0

1. How many addresses make up a typical class C range? Specifically a /24

A: 256

1. Of these addresses two are reserved, what is the first addresses typically reserved as?

A: network

1. The very last address in a range is typically reserved as what address type?

A: broadcast

1. A third predominant address type is typically reserved for the router, what is the name of this address type?

A: gateway

1. Which address is reserved for testing on individual computers? (Hint: This is sometimes reffered to as the loopback address)

A: 127.0.0.1

1. A particularly unique address is reserved for unroutable packets, what is that address? This can also refer to all IPv4 addresses on the local machine. (Hint: This is typically seen within the context of servers, it’s before the A range.)

A: 0.0.0.0 (the default route)

Binary to Decimal

• an IP address consists of 32 bits (8 bytes) split up into 4 sections

Questions

1. 1001 0010

A: 146

1. 0111 0111

A: 119

1. 1111 1111

A: 255

1. 1100 0101

A: 197

1. 1111 0110

A: 246

1. 0001 0011

A: 19

1. 1000 0001

A: 129

1. 0011 0001

A: 39

1. 0111 1000

A: 120

1. 1111 0000

A: 240

1. 0011 1011

A: 59

1. 0000 0111

A: 7

Decimal to Binary

Questions

1. 238

A: 11101110

1. 34

A: 00100010

1. 123

A: 01111011

1. 50

A: 00110010

1. 255

A: 11111111

1. 200

A: 11000100

1. 10

A: 00001010

1. 138

A: 10001010

1. 1

A: 00000001

1. 13

A: 00001101

1. 250

A: 11111010

1. 114

A: 01110010

Address Class Identification

Questions

1. 10.240.1.1

A: A

1. 150.10.15.0

A: B

1. 192.14.2.0

A: C

1. 148.17.9.1

A: B

1. 193.42.1.1

A: C

1. 126.8.156.0

A: A

1. 220.200.23.1

A: C

1. 230.230.45.58

A: D

1. 177.100.18.4

A: B

1. 119.18.45.0

A: A

1. 117.89.56.45

A: A

1. 215.45.45.0

A: C