OSI Model

Question 1

1. Physical

Answer 1

Signaling, Cabling, and connectors

Question 2

2. Data Link

Answer 2

The Switching layer

Question 3

3. Network

Answer 3

The Routing Layer (IP addresses, Routers, Packets)

Question 4

4. Transport

Answer 4

The “post office” layer (TCP segments, UDP datagrams)

Question 5

5. Session

Answer 5

Communication between devices (control protocols, tunneling protocols)

Question 6

6. Presentation

Answer 6

Encoding and encryption (SSL/TLS)

Question 7

7. Application

Answer 7

The layer we see (Google Mail, Twitter, Facebook)