Principle of TCP/IP protocol and Application Note 19:IP packet delivery and routing

1. Introduction:

(1) Internet structure:

Information:IP grouping (Directed broadcast address) that specifies " all hosts " in a particular network. ）

Nodes: routers, host-----> select paths, Delivery groupings

Channel: physical network (between routers)-----> Transfer IP packets

(2) Delivery and routing options

--->1. Delivery ( delivery ): Physical forwarding of groupings

delivery is done by Routed Protocol ( the delivery group along the selected path ).

Routed Protocol-----Typical representative----> IP Protocol

--->2. Routing ( route selection, routing ): Finding routes for grouping

Route selection is done by Routing Protocol ( looking for the best way to reach the destination )

--->3. Route and Routing differences:

2. connection-oriented and no-connection services

(1) Services (service)

Service three kinds of meaning :

--->1. Network application: Business (Network application layer)

--->2. OSI model: The lower layer provides a set of actions for the upper layer

--->3. Here's what it means: communication Protocols

So the topic here can be "connection-oriented and non-connected protocols".

(2) connection-oriented and no-connection differences

Principle of TCP/IP protocol and Application Note 19:IP packet delivery and routing