12. Connectivity
The medium that provides the channel over which
message travels from source to destination.
-Wired
Metallic wires: Electrical impulses
Optical Fibers: Pulses of light (infrared or visible
light)
-Wireless
Electromagnetic waves
26. Port Number
In order to pass data streams to the proper
applications, the transport layer must identify the
target application. To accomplish this, it assigns an
application identifier called “Port Number”.
Source port number and destination port number
28. IP Address
An Internet Protocol address is a numerical label
assigned to each device participating in a computer
network that uses the Internet Protocol for
communication.
Source IP address and destination IP address.
29. IP Address
IP version 4 : 32 bits
- Broadcast Address
- Unicast Address
- Multicast Address
IP version 6 : 128 bits
30. Client Server Model
Client : The device requesting the information.
Server: The device responding to the request.