Network+ OSI Model Flashcards

Front

Address Resolution Protocol (ARP) operates at which layer of the Open Systems Interconnection (OSI) Model?

Back

Data Link – Address Resolution Protocol (ARP) works at Layer 2 to map Internet Protocol (IP) addresses to Media Access Control (MAC) addresses.

Front

At what layer of the Open Systems Interconnection (OSI) model does a router operate?

Back

Network – Routers operate at Layer 3 and use Internet Protocol (IP) to route data packets between networks.

Front

How many layers are in the Open Systems Interconnection (OSI) Model?

Back

7 – The Open Systems Interconnection (OSI) Model consists of seven layers that guide network communication from physical hardware to applications.

Front

Hypertext Transfer Protocol (HTTP) operates on what layer of the Open Systems Interconnection (OSI) model?

Back

Application – HTTP works at Layer 7 to allow users to access websites and communicate with web servers.

Front

Layer 6 of the Open Systems Interconnection (OSI) model is known as what?

Back

Presentation – This layer handles data formatting, encryption, and compression so that the Application layer can understand the data.

Front

On which layer of the Open Systems Interconnection (OSI) model would a frame be located?

Back

Data Link – A frame is the Protocol Data Unit (PDU) at Layer 2, containing headers and trailers for reliable local delivery.

Front

What is the Protocol Data Unit (PDU) of Layer 1 of the Open Systems Interconnection (OSI) model?

Back

Bit – The Physical layer transmits data as raw bits (0s and 1s) through cables, fiber optics, or air.

Front

What is the Protocol Data Unit (PDU) of Layer 3?

Back

Packet – The Network layer uses packets that contain logical addressing like Internet Protocol (IP) addresses to route data.

Front

What is the Protocol Data Unit (PDU) of Layer 4?

Back

Segment – The Transport layer breaks messages into segments and ensures they are delivered in order and without errors using protocols like Transmission Control Protocol (TCP).

Front

What layer is the Data Link layer?

Back

Layer 2 – This layer provides physical addressing using Media Access Control (MAC) addresses and reliable frame delivery within a local network.