Semester 2 - Review

OSI Model

Layer 7 - Application

HTTP, Word Perfect, email

Layer 6 - Presentation

.JPEG, .TXT, Encryption

Layer 5 - Session

SQL, RPC, NFS, X-windows

Layer 4 - Transport - Segments

Windowing, TCP, UDP, Virtual Circuits

Layer 3 - Network - Packets

IP Addresses, Routers

Layer 2 - Data Link - Frames

MAC Addresses, Switches, Bridges, MAC Sublayer/LLC Sublayer

Layer 1 - Physical - Bits

Twisted pair, coax, fiber, Repeaters/Hubs, Binary digits

Application Layer (OSI Layers 7,6,5)

Handles high level protocols

Transport (OSI Layer 4)

TCP, quality of service, segments

Internet (OSI Layer 3)

IP, best path

Network (OSI Layers 1 and 2)

Physical Link, includes LAN and WAN technologies

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