M3Q18: The TCP/IP Model

Question 1

The TCP/IP Model includes 7 layers.

A. True
B. False

Answer 1

B. False

Explanation: The TCP/IP Model has only 4 layers while the OSI Model has 7 layers.

Question 2

The TCP/IP Network Interface Layer (aka Link Layer) corresponds to the OSI Model Physical and Data Link Layers.

A. True
B. False

Answer 2

A. True

Explanation: The layers of the TCP/IP Model correspond to certain layers of the OSI model. Since there are only 4 layers in the TCP/IP Model some of them will correspond to multiple layers of the OSI Model:

• Layer 1 of TCP/IP corresponds to Layers 1 and 2 of the OSI Model.
• Layer 2 of the TCP/IP Model corresponds directly to Layer 3 of the OSI Model.
• Layer 3 of the TCP/IP Model corresponds directly to layer 4 of the OSI Model.
• Layer 4 of the TCP/IP Model corresponds to Layers 5 – 7 of the OSI Model.

Question 3

The TCP/IP Model is a representation of the TCP/IP stack of protocols.

A. True
B. False

Answer 3

A. True

Explanation: The TCP/IP Model represents the TCP/IP stack of protocols that already exist.

Question 4

Layer 2 of the TCP/IP Model is known as the ______________ Layer.

A. Network Interface
B. Application
C. Internet
D. Transport

Answer 4

C. Internet Layer

Explanation: The second layer of the TCP/IP Model is the Internet Layer which handles routing and the IP protocol.

Question 5

The TCP/IP Network Interface Layer is also known as the ________________.

A. Network Layer
B. Link Layer
C. Application Layer
D. Transport Layer

Answer 5

B. Link Layer

Explanation: Layer 1 of the TCP/IP Model technically has two names. It can be called either the Network Interface Layer or the Link Layer.