Angel
- Networking Basics
The application layer defines how web browsers pull a web page from a web server, and defines the services that applications need. These are services that are user applications.
Angel
- VoIP
IP Phone Boot Process is as follows: power over ethernet provides power via IEEE 802.3af oe 802.3at or Cisco ILP. VLANs are learned through CDP or LLDP. The phone sends a DHCP request in the voice VLAN; the response includeds an IP and DHCP option 150.
Angel
- VoIP basics
Sampling - 8000 discrete signal measurements are taken at equal intervals every second. Quantization - The level of each sample is rounded to the nearest expressible value. Encoding - Digital values are encoded as binary numbers for encapsulation. Compression - The digital signal is compressed in real time to consume less bandwidth.
