# Information

## Room#

**Name:**Networking**Profile:**tryhackme.com**Difficulty:**Easy**Description**: Part of the Blue Primer series, learn the basics of networking

# Write-up

## Overview#

Install tools used in this WU on BlackArch Linux:

1 | pikaur -S radare2 |

**Disclaimer**: The answer essentially requires to search for options in the
man page so it doesn't need a detailed write-up.

## [Task 1] Kinda like a street address, just cooler.#

**#1**

How many categories of IPv4 addresses are there?

Answer: 5

**#2**

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

Answer: E

**#3**

How many private address ranges are there?

Answer: 3

**#4**

Which private range is typically used by businesses?

Answer: A

**#5**

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

Answer: 192.168.0.0

**#6**

How about the second common private home range?

Answer: 192.168.1.0

**#7**

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

Answer: 256

**#8**

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

Answer: network

**#9**

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

Answer: broadcast

**#10**

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

Answer: gateway

**#11**

Which address is reserved for testing on individual computers?

Answer: 127.0.0.1

**#12**

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.

Answer: 0.0.0.0

## [Task 2] Binary to Decimal#

**#1**

1001 0010

Answer: 146

1 | $ rax2 10010010d |

**#2**

0111 0111

Answer: 119

1 | $ rax2 01110111d |

**#3**

1111 1111

Answer: 255

1 | $ rax2 11111111d |

**#4**

1100 0101

Answer: 197

1 | $ rax2 11000101d |

**#5**

1111 0110

Answer: 246

1 | $ rax2 11110110d |

**#6**

0001 0011

Answer: 19

1 | $ rax2 00010011d |

**#7**

1000 0001

Answer: 129

1 | $ rax2 10000001d |

**#8**

0011 0001

Answer: 49

1 | rax2 00110001d |

**#9**

0111 1000

Answer: 120

1 | $ rax2 01111000d |

**#10**

1111 0000

Answer: 240

1 | $ rax2 11110000d |

**#11**

0011 1011

Answer: 59

1 | $ rax2 00111011d |

**#12**

0000 0111

Answer: 7

1 | $ rax2 00000111d |

## [Task 3] Decimal to Binary#

**#1**

238

Answer: 11101110

1 | $ rax2 b238 |

**#2**

34

Answer: 00100010

1 | $ rax2 b34 |

**#3**

123

Answer: 01111011

1 | $ rax2 b123 |

**#4**

50

Answer: 00110010

1 | $ rax2 b50 |

**#5**

255

Answer: 11111111

1 | $ rax2 b255 |

**#6**

200

Answer: 11001000

1 | $ rax2 b200 |

**#7**

10

Answer: 00001010

1 | $ rax2 b10 |

**#8**

138

Answer: 10001010

1 | $ rax2 b138 |

**#9**

1

Answer: 00000001

**#10**

13

Answer: 00001101

1 | $ rax2 b13 |

**#11**

250

Answer: 11111010

1 | $ rax2 b250 |

**#12**

114

Answer: 01110010

1 | $ rax2 b114 |

## [Task 4] Address Class Identification#

**#1**

10.240.1.1

Answer: a

**#2**

150.10.15.0

Answer: b

**#3**

192.14.2.0

Answer: c

**#4**

148.17.9.1

Answer: b

**#5**

193.42.1.1

Answer: c

**#6**

126.8.156.0

Answer: a

**#7**

220.200.23.1

Answer: c

**#8**

230.230.45.58

Answer: d

**#9**

177.100.18.4

Answer: b

**#10**

119.18.45.0

Answer: a

**#11**

117.89.56.45

Answer: a

**#12**

215.45.45.0

Answer: c