Place holder
Port Numbers and Their protocols
- HTTP: 80
- HTTPS: 443
- FTP (data): 20
- FTP (control): 21
- SMTP: 25
- DNS: 53
- DHCP (client): 68
- DHCP (server): 67
- Telnet: 23
- SSH: 22
PDU UNITS
How do “bits,” “segments,” “packets,” and “frames” relate to the integrated five-layer TCP/IP model
Bits are used at the Physical layer, frames at the Data Link layer, packets at the Network layer, and segments at the Transport layer.
Binary Values
1 is on
0 is off
1111111 = 255
0000001 = 1
HEXADECIMAL
