A router receives a packet destined for a host on a remote network. The router examines the destination IP address, consults its routing table, and determines the next-hop IP address. It then encapsulates the packet in a new frame with the next-hop MAC address. Which OSI layers are involved in this process?

Data Link layer for routing, and Network layer for frame encapsulation.

Session layer for routing, and Network layer for frame encapsulation.

Network layer for routing, and Data Link layer for frame encapsulation.

Transport layer for routing, and Physical layer for frame encapsulation.

A network technician is troubleshooting a connectivity issue where a device is connected to a switch but cannot communicate with any other device on the network. The technician uses a cable tester and confirms that the cable is wired correctly. The switch port LED is lit, indicating a link is established. Which OSI layer should the technician investigate next?

Data Link layer, because the device may have a misconfigured MAC address or VLAN assignment.

Physical layer, because the link LED is lit but the device cannot communicate.

Transport layer, because the device may have a firewall blocking traffic.

Network layer, because the device may have an incorrect IP address.

A user is sending an email using an email client. The email client uses SMTP to send the message to the mail server. Which OSI layer is SMTP associated with?

Application layer, because SMTP is an application protocol that provides network services to end-user applications.

Session layer, because SMTP establishes a session with the mail server.

Presentation layer, because SMTP formats the email for transmission.

Transport layer, because SMTP uses TCP for reliable delivery.

A network administrator is explaining the differences between the OSI and TCP/IP models to a junior technician. The administrator states that the TCP/IP model combines several OSI layers into fewer layers. Which OSI layers are combined in the TCP/IP model's Application layer?

Session, Presentation, and Application

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Domain 1Objective 1

OSI Model Layers N10-009 Practice Questions (Page 3)

Part of the Networking concepts domain, which makes up ~25% of our current practice bank. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~9–15 in this domain), expect 1–2 from this objective — we provide 33 practice questions to prepare you well beyond it. (estimate)

33questions here

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Questions 11–15

11expert · easy
A network architect is comparing the OSI and TCP/IP models to decide which framework to use for documenting a new network design. The architect notes that the TCP/IP model combines the OSI model's Data Link and Physical layers into a single layer. Which layer in the TCP/IP model corresponds to this combination?
Select an answer first
12application · medium
A router receives a packet destined for a host on a remote network. The router examines the destination IP address, consults its routing table, and determines the next-hop IP address. It then encapsulates the packet in a new frame with the next-hop MAC address. Which OSI layers are involved in this process?
Select an answer first
13application · medium
A network technician is troubleshooting a connectivity issue where a device is connected to a switch but cannot communicate with any other device on the network. The technician uses a cable tester and confirms that the cable is wired correctly. The switch port LED is lit, indicating a link is established. Which OSI layer should the technician investigate next?
Select an answer first
14application · easy
A user is sending an email using an email client. The email client uses SMTP to send the message to the mail server. Which OSI layer is SMTP associated with?
Select an answer first
15application · easy
A network administrator is explaining the differences between the OSI and TCP/IP models to a junior technician. The administrator states that the TCP/IP model combines several OSI layers into fewer layers. Which OSI layers are combined in the TCP/IP model's Application layer?
Select an answer first

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OSI Model Layers N10-009 Practice Questions (Page 3)

Questions 11–15

A user is sending an email using an email client. The email client uses SMTP to send the message to the mail server. Which OSI layer is SMTP associated with?

A network administrator is explaining the differences between the OSI and TCP/IP models to a junior technician. The administrator states that the TCP/IP model combines several OSI layers into fewer layers. Which OSI layers are combined in the TCP/IP model's Application layer?

Keep studying — Networking concepts