A PACKET and OSI/RM LAYERS
A packet is a fixed piece of information sent across a network. Whenever information is sent, the packet creation process commences. It consists of three elements.
1. A HEADER ............... OSI/RM layer information
2. THE DATA ............... The client request or server response
3. A TRAILER ............... Contains techniques ensuring that errors do not occur during transmission
Many networking professionals use the terms 'packet', 'datagram' and 'frame' interchangeably. Although the use is accurate most of the time, packet' is a generic term for any piece of information passed through a network.
1. A HEADER ............... OSI/RM layer information
2. THE DATA ............... The client request or server response
3. A TRAILER ............... Contains techniques ensuring that errors do not occur during transmission
Many networking professionals use the terms 'packet', 'datagram' and 'frame' interchangeably. Although the use is accurate most of the time, packet' is a generic term for any piece of information passed through a network.
How it Works - The OSI/RM Layers and the Internet Architecture
The OSM/RM model was defined by the International Organisation for Standardisation (ISO) in 1983 - www.iso.ch. There are three practical functions:
1. It gives developers the necessary universal concepts so that they can develop and perfect protocols.
2. It explains the framework used to connect to different systems, allowing clients and servers to communicate
even if they are using different applications and operating systems - all they need is a common protocol, such as
TCP/IP or IPX/SPX.
3. It describes the process of packet creation (breaking down).
Networks are built using the OSI/RM, just as buildings are constructed from a blueprint.
1. It gives developers the necessary universal concepts so that they can develop and perfect protocols.
2. It explains the framework used to connect to different systems, allowing clients and servers to communicate
even if they are using different applications and operating systems - all they need is a common protocol, such as
TCP/IP or IPX/SPX.
3. It describes the process of packet creation (breaking down).
Networks are built using the OSI/RM, just as buildings are constructed from a blueprint.
USER NAME
The user name is identified by the part of the address before the @ and is also known as the email account. These addresses may include dots, underscores or numbers, in addition to letters.
The user name is identified by the part of the address before the @ and is also known as the email account. These addresses may include dots, underscores or numbers, in addition to letters.
DOMAIN
The part of the address after the @ is the domain name of the organisation.
The part of the address after the @ is the domain name of the organisation.