[&] Protocols such as TCP and UDP reside at which layer of the OSI model? (Select the best answer)
- Presentation
- Transport
- Session
- Network

[&] Within the OSI model, if a protocol were designed to accomplish a connection-oriented session end-to-end between a Laptop and a Server, it would most likely reside at the [\_\_\_\_]-layer of the OSI model. And another protocol designed to determine how-and-when the network media could be accessed would reside at the [\_\_\_\_]-layer of the OSI model **(select the best answer)**.
- Transport, Data Link
- Application, Physical
- Session, Physical
- Network, Data Link
- Transport, Physical

[&] Which of the following represents all of the layers of the OSI model in their correct order (from Layer-7 to Layer-1)? (Select the best answer)
- Application, Presentation, Session, Transport, Network, Data Link, Physical
- Physical, Data Link, Network, Transport, Session, Presentation, Application
- Application, Session, Presentation, Transport, Network, Data Link, Physical
- Physical, Data Link, Network, Session, Transport, Presentation, Application

[&] Which of the answers provided here lists all of the layers included in the OSI model and in their correct order? **(select the best answer)**
- Application, Session, Presentation, Transport, Network, Physical
- Physical, Data Link, Network, Transport, Presentation, Application
- Physical, Data Link, Network, Transport, Presentation, Session, Application
- Application, Presentation, Transport, Session, Network, Data Link Physical
- Physical, Data Link, Network, Transport, Session, Presentation, Application

[&] At which layer of the OSI Model does SNMP reside? (**Select the best answer**)
- Network
- Transport
- Session
- Application
- Presentation

[&] You call in a trouble ticket with the IT department of your company because you are unable to reach the company website from your home computer. The Technical Engineer who is working on your case asks you if you have completed any troubleshooting on your own at the Data Link Layer of the OSI model.

You have done the following troubleshooting steps on your own. Which of these tasks falls within this layer? **(select the best answer)**
- You checked to ensure that you could reach the IP address of your default gateway by pinging
it.
- You checked to ensure that the computer had power.
- You verfied that you were using the most updated version of your web browser.
- You ran a Sniffer trace and verfied that the destination MAC address of your transmitted frames
was correct.
- You checked to ensure that you had an IP address.
- You checked to ensure that the computer had a network cable plugged into it.

[&] What is the name of the PDU created by a protocol that resides within the Network layer of the OSI model? (Select the best answer)
- A datagram
- A frame
- A segment
- A packet

[&] If I asked you to troubleshoot something at the Network layer of the OSI model, which of the following would be appropriate for you to troubleshoot? (Select the best answer)
- If an encryption key were missing on a host device
- If a server was not programmed to listen to incoming FTP connections
- If a cable were missing or unplugged from a router
- If a department had been assigned the  IP subnet

[&] If I asked you to troubleshoot something at the Data Link layer of the OSI model, which of the following would be appropriate for you to troubleshoot? (Select the best answer)
- If a cable were missing or unplugged from a router
- If a MAC address had been inly learned by a switch
- If a server was not programmed to listen to incoming FTP connections
- If an encryption key were missing on a host device