IT Networking

IT Networking - OSI Stack
Application Command line network troubleshooting User interaction	Firewalls DMZ
Presentation Formats data from the Application layer to the layers below Originally data encrypton was intended to be done here It is sometimes called the syntax layer
Session Interface between upper two layers and the networking layers Upper layers don't need to know how to navagate the network	Sockets Socket analogy NetBIOS
Transport Issues orderly network traffic and identifies traffic types	Wrappers TCP TCP Ports UDP Header Network Address Translation
Network Provides addressing for intranet & internet traffic	IP Packet Wrappers IP Address Classes IP Private Addresses Net Masks Router Protocols Domain Name System Dynamic DNS Dynamic Host Configuration Protocol
Data-Link Provides local addressing and traffic management for sub-nets	Hubs and Switches Ethernet Collisions Data link packets Wrappers Switches Wireless Access Points
Physical The interconnection and wiring of all active electronics above it	IT CAT Cable IT Fiber Cable

IT and Networking