CCST - Cisco Certified Support Technician OSI and TCP/IP Models Questions and Answers

Question 1

A network technician is troubleshooting an issue where a user can ping the IP address of a web server but cannot open the website in their browser.
At which layer of the OSI model is the problem MOST likely occurring?

Accepted Answer

Application Layer

Answer

Network Layer

Answer

Transport Layer

Answer

Data Link Layer

Question 2

During the data encapsulation process, which Protocol Data Unit (PDU) is created at the Network Layer of the OSI model?

Accepted Answer

Packet

Answer

Segment

Answer

Frame

Answer

Bits

Question 3

Which layer of the TCP/IP model is responsible for logical addressing and determining the best path for data to travel across the network?

Accepted Answer

Internet

Answer

Application

Answer

Transport

Answer

Network Access

Question 4

A support technician is investigating a connectivity issue. The user's network cable is properly connected, and the link light on the network interface card (NIC) is green. However, the user cannot access any network resources. Using a bottom-up troubleshooting approach based on the OSI model, what is the NEXT layer the technician should investigate?

Accepted Answer

Data Link Layer

Answer

Network Layer

Answer

Transport Layer

Answer

Physical Layer

Question 5

Which of the following functions is a primary responsibility of the Transport Layer in both the OSI and TCP/IP models?

Accepted Answer

Establishing reliable, end-to-end connections using protocols like TCP.

Answer

Converting data into electrical signals for transmission.

Answer

Providing logical device addressing and path determination.

Answer

Formatting data with encryption and compression.

Question 6

The TCP/IP model's Application layer combines the functions of which three layers of the OSI model?

Accepted Answer

Session, Presentation, and Application

Answer

Network, Data Link, and Physical

Answer

Transport, Network, and Data Link

Answer

Physical, Data Link, and Session

A network technician is troubleshooting an issue where a user can ping the IP address of a web server but cannot open the website in their browser.At which layer of the OSI model is the problem MOST likely occurring?

A network technician is troubleshooting an issue where a user can ping the IP address of a web server but cannot open the website in their browser.
At which layer of the OSI model is the problem MOST likely occurring?