Understanding IEEE 802 Standards for Networking

Model 802
IEEE defined in the 80s
Responsible for defining communication,
transmission, and use of LANs.

802.1: Definition Network International
We define that the network devices should be identified by 48 bits where the first 3 bytes are defined by the IEEE. This identifier must be unique for each product.

802.2: Logical Link Control (LLC)
It defines the controls for the transmission, i.e., defines handshaking.

802.3: Method of Access to the Medium
It defines the access method or wireless LAN, and collisions are resolved by the present CSMA/CA and CSMA/CD.

802.5: Token Ring
It defines the logical and physical topologies of Token Ring.

802.11: Wireless Networks (WiFi)
Establishes standards for speed, frequency, and scope in local wireless transmissions.

802.15: Wireless Networks (Low Rate)
Low-frequency wireless networking standards are defined for personal networks based on radio frequencies.

802.16: Wireless Carrier Broadband Networks
Standards for WiMAX networks.

FDDI Ring: 802.17
Standardization of communication with optical fiber ring.

Normative: 802.18
Radio Ad: 802.19
Coexistence Consulting Group: 802.20
Wireless Broadband Access Mobile Interoperability: 802.21
Wireless Network Area Regional: 802.22

* Model DOD or TCP/IP Model
Created in the 70s to request the department in defense of the United States.
The TCP/IP protocol is a group for a specific purpose for each. Unlike the OSI model, it is implemented more easily. Each layer is formed and defines the protocols and layers used in communication between two nodes.

Application
Transport
Internet or Inter-network
Physical

* Methods of Transmission
Methods of Transmission
Series: Higher speed, increased distance. The packets are transmitted into segments one after another.
Parallel: Higher speed, less distance. Each frame is transmitted one at a time.

Connections
Point to Point: The devices are connected directly to one another (e.g., Null Modem, 115,000). It provides an entry point and one exit only.

Multipoint: One device connects to several at once. Communication is done in series. Used in the topology of star.