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Delwin Thermitus
03/27/2022
Cyber Security

File Analysis Tools
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The File command is for determining the type of file
...
COMMANDS
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ZIP
GZIP
UNRAR
TAR

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ASCII means plain

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IPv4 in depth

Computer & Network 2

Binary Math
- IPv4 Address
- IPv4 is represented in decimal somewhere in the range of:
▪ 0
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0
...
255
...
255
- In autuality, It is 4 bytes
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Special/ Reserved IPv4 Addresses
- 127
...
0
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- Technically a range from
▪ 127
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0
...
255
...
254
- Broadcast Address
- The last address in a Subnet is typically reserved for the Broadcast Address
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- Router Address
- The first number in a Subnet is reserved for the network name
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Reserved Addresses
- 240
...
0
...
255
...
254
- Reserved for testing/ future use
The case for IPv6
- IPv4 is limited
- IPv6 is huge
Summary
- IPv4 Binary Math
- It is all about the 1’s and 0’s
- We still represent IPv4 Addresses in decimal
- Subnet Mask splits the IPv4 addresses into 2 parts
- The Subnet Mask the device IP Address
- CIDR Notation (/24) refers to how many 1’s are in the binary representation of
the Subnet Mask
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0
...
1 is the Loopback/ home IPv4 address
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168
...
0/24)
The second IPv4 address of a Subnet is reserved for the Broadcast

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IPv6 will take a while to take over

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