CompTIA Network+ Exam N10-009 OSI Reference Model

Layer 7 - Application Layer (1)

HTTP

Layer 7 - Application Layer (2)

FTP,

Layer 7 - Application Layer (3)

DNS

Layer 7 - Application Layer (4)

SMTP

Layer 6 - Presentation Layer: 1

encryption

Layer 6 - Presentation Layer:2

compression

Layer 6 - Presentation Layer:3

translation between different formats

Layer 6 - Presentation Layer:4

SSL/TLS

Layer 5 - Session Layer:1

Manages sessions or connections between applications

Layer 5 - Session Layer:2

It is responsible for establishing, maintaining, and terminating connections.

Layer 4 - Transport Layer:1

Manages end-to-end communication

Layer 4 - Transport Layer:2

error recovery

Layer 4 - Transport Layer:3

flow control

Layer 4 - Transport Layer:4

Protocols like TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are examined here, along with ports.

Layer 3 - Network Layer:1

IP addressing,

Layer 3 - Network Layer:2

routers

Layer 3 - Network Layer:3

routing protocols (e.g., RIP, OSPF

Layer 3 - Network Layer:4

subnetting are covered in this layer.

Layer 2 - Data Link Layer:1

Concepts like Ethernet

Layer 2 - Data Link Layer:2

MAC addresses,

Layer 2 - Data Link Layer:3

switches,

Layer 2 - Data Link Layer:4

bridging are introduced here.

Layer 1 - Physical Layer:

Topics like types of cables (e.g., Cat 5, fiber optic), connectors, and basic electrical signaling are covered.

In the OSI reference model, a NIC resides at the:

Data Link Layer

Which of the answers listed below refer to common network protocols that reside at Layer 3 of the OSI model? (Select 2 answers)

IP, ICMP

Examples of common protocols that reside at the OSI Transport Layer include:

UDP, TCP