Here you can find all populair tutorials that you can use for ubuntu.
| CIDR/Prefix | Available IPs | Subnet mask | Bits |
|---|
- CIDR = Available IP range
| CIDR/Prefix | Available IPs | Subnet mask | Bits |
|---|
- CIDR = Available IP range
| CIDR/Prefix | Available IPs | IP adress range | Subnet mask | Bits |
|---|---|---|---|---|
| /8 | 16,777,216 | 10.0.0.0 - 10.255.255.255 | 255.0.0.0 | 24 |
| /12 | 1,048,576 | 172.16.0.0 – 172.31.255.255 | 255.240.0.0 | 20 |
| /16 | 65,538 | 192.168.0.0 – 192.168.255.255 | 255.255.0.0 | 16 |
- CIDR = Available IP range
| Catergory | Transfer Speed | Frequency | Cable Type | Introduced |
|---|---|---|---|---|
| Cat 1 | Up to 1Mbps | 400KHz | Twisted pair (single pair) | 1983 |
| Cat 2 | Up to 4Mbps | 4MHz | Twisted pair (two pairs) | 1987 |
| Cat 3 | Up to 10Mbps | 16MHz | Twisted pair (three pairs) | 1991 |
| Cat 4 | Up to 16Mbps | 20MHz | Twisted pair (four pairs) | 1993 |
| Cat 5 | Up to 100Mbps | 100MHz | Twisted pair (four pairs) | 1995 |
| Cat 5e | Up to 1000Mbps (1Gbps) | 100MHz | Twisted pair (four pairs) | 2001 |
| Cat 6 | Up to 10Gbps | 250MHz | Twisted pair (four pairs) | 2002 |
| Cat 6a | Up to 10Gbps | 500MHz | Twisted pair (four pairs) | 2008 |
| Cat 7 | Up to 10Gbps | 600MHz | Twisted pair (four pairs) | 2010 |
| Cat 7a | Up to 10Gbps | 1GHz | Twisted pair (four pairs) | 2013 |
| Cat 8.1 | Up to 25Gbps | 2GHz | Twisted pair (four pairs) | 2016 |
| Cat 8.2 | Up to 40Gbps | 2GHz | Twisted pair (four pairs) | 2018 |
- Category = The category of the cable (generation)
- Transfer Speed = The transferspeed the abount of data it can handle thru the cable
- Frequency = Property of a cable and measures the rate at which a signal will cycle each second (1MHz = 1 million cycles/second)
- Cable type = The number of wires in a network cable, the first 4 pair (8 wires) network cable is introduced in 1995
- Some cables come with UTP (Unshielded Twisted Pair) or STP (Shielded Twisted Pair), COAX cables are part of the STP type. Fibre optic is part of the UTP
| DNS Name | IPv4 | IPv6 | DoH | DoT |
|---|---|---|---|---|
| CloudFlare | 1.1.1.1, 1.0.0.1 | 2606:4700:4700::1111, 2606:4700:4700::1001 | https://cloudflare-dns.com/dns-query | 1dot1dot1dot1.cloudflare-dns.com, one.one.one.one |
| CloudFlare Anti-Malware | 1.1.1.2, 1.0.0.2 | 2606:4700:4700::1112, 2606:4700:4700::1002 | https://security.cloudflare-dns.com/dns-query | security.cloudflare-dns.com |
| CloudFlare Family (Anti-Malware/Block-Adult Conent) | 1.1.1.3, 1.0.0.3 | 2606:4700:4700::1113, 2606:4700:4700::1003 | https://family.cloudflare-dns.com/dns-query | family.cloudflare-dns.com |
| 8.8.8.8, 8.8.4.4 | 2001:4860:4860::8888, 2001:4860:4860::8844 | https://dns.google/dns-query, https://dns.google/resolve? | dns.google |