1.2 - The OSI Model

Question 1

Layer 1

Answer 1

Physical

- Cabling, connectors, etc

Question 2

Layer 2

Answer 2

Data Link

• DLC, Data Link Control Protocols
• MAC address on Ethernet
• The “switching” layer

Question 3

Layer 3

Answer 3

Network

• The “routing” layer
• IP
• IP fragmentation, multiples of 8 bits, creates smaller packets

Question 4

Layer 4

Answer 4

Transport

• TCP and UDP
• “Layer 4 protocols”

Question 5

Layer 5

Answer 5

Session

• Communication management between devices
• Control protocols, tunneling protocols

Question 6

Layer 6

Answer 6

Presentation

• Character encoding
• Encryption (SSL / TLS)
• Often combined with layer 7 (Application)

Question 7

Layer 7

Answer 7

Application

• The layer we see
• ex) HTTP, FTP, DNS, POP3

Question 8

Layer 7 - Layer 1

Answer 8

All People Seem To Need Data Processing