OSI Model FLASHCARDS

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Last updated 8:43 PM on 6/26/26
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16 Terms

1
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Layer 1 name + job?

→ Physical; moves raw bits as physical signals

2
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Layer 1 examples?

→ cables, fiber, hubs, signals

3
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Layer 2 name + job?

→ Data Link; moves data on local network using MAC addresses

4
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Layer 2 devices/concepts?

→ switches, MAC addresses, VLANs, frames

5
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Which layer do switches and VLANs operate at?

→ Layer 2

6
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  1. Layer 3 name + job?

→ Network; routes between networks using IP addresses

7
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  1. Layer 3 device + concept?

→ Router; IP addresses, routing

8
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  1. Layer 4 name + job?

→ Transport; reliable/fast delivery using TCP/UDP + ports

9
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  1. Layer 4 protocols?

→ TCP (reliable) and UDP (fast)

10
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  1. Router operates at which layer?

→ Layer 3

11
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  1. TCP, UDP, and port numbers are which layer?

→ Layer 4

12
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  1. Layer 5 name + job?

→ Session; starts/manages/ends connections

13
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  1. Layer 6 name + job?

→ Presentation; translates, formats, encrypts (SSL/TLS)

14
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  1. Layer 7 name + job?

→ Application; where users/apps access the network

15
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  1. Which layer is encryption (SSL/TLS)?

→ Layer 6 (Presentation)

16
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  1. HTTP, DNS, FTP, SMTP, SSH are which layer?

→ Layer 7 (Application)