1. Physical - Binary transmission
2. Data Link - Access to media
3. Network - Address and best path
4. Transport - End to End connections
5. Session - Interhost Communication
6. Presentation - Data Representation
7. Application - Network processes to applications
The overall function of the OSI model is to reduce complexity and the problems it solves is standardized interfaces, gives symmetry to networks and speeds the evolution process.
The characteristics of the Physical layer of the OSI model include...Providing electrical and physical specs for the networking media that carry the data bits.
The characteristics of the Data Link layer of the OSI model include...Seperating data into frames and giving access to media.
The characteristics of the Network layer of the OSI model include...This is the most important, where the routing takes place.
The characteristics of the Transport layer of the OSI model include...Reliable transmission of Data segments, also disassembles and assembles data before transmission.
The function of routing in networks is...To determine the best path to a network.
The different classes of routing protocols are:
1. Distance Vector - This class of routing protocols find the shortest path by determining the number of hops in a given route, requiring each router to send its complete routing table with each update only to its neighbors. Distance Vector algorithms are simpler than Link State, but tend to generate loops.
2. Link State - This class of routing protocols use broadcast or multicast functions to reach all neighbors and nodes on a network. Link State will provide a consistent view of the network and therefore will not provide routing loops. However this requires much more bandwidth and more widespread traffic.
Data communications in routed, TCP/IP, Ethernet Internetworks is..Connection Oriented.
In Semesters 1&2 I learned...everything from Ip addressing to cable making. This Is important to network designers because...without this, networks would not exist.
