D315 - Network And Security Foundations Latest Actual Exam With Verified Questions & Correct Answers

D315 - NETWORK AND SECURITY FOUNDATIONS
LATEST ACTUAL EXAM WITH VERIFIED QUESTIONS &
CORRECT ANSWERS
Question 1.
Transmits raw bits over cables, radio waves, or fiber. Handles the physical signal itself.

ANSWER
Layer 1 - Physical



Question 2.
Moves frames between devices on the same local network. Uses MAC addresses. Detects and
handles errors at the data link.

ANSWER
Layer 2 - Data Link



Question 3.
Routes packets between different networks using IP addresses.

ANSWER
Layer 3 - Network



Question 4.
Responsible for end-to-end communication and error recovery, ensuring complete data transfer
between the source and destination.. Uses TCP (reliable) and UDP (fast). Uses port numbers.

ANSWER
Layer 4 - Transport



Question 5.
Manages sessions between applications. Opens, maintains, and closes communication
channels.

ANSWER
Layer 5 - Session



Question 6.
Formats and translates data. Handles encryption, decryption, compression, encoding.

ANSWER
Layer 6 - Presentation




1

,Question 7.
Interfaces directly with the end-user applications. This is where protocols like HTTP, DNS, SMTP
exist.

ANSWER
Layer 7 - Application



Question 8.
Which layers of the OSI model deal with data?

ANSWER
Layers 5, 6, and 7



Question 9.
Which layer of the OSI model deals with Segments?

ANSWER
Layer 4 - Transport



Question 10.
Which layer of the OSI model deals with Packets?

ANSWER
Layer 3 - Network



Question 11.
Which layer of the OSI model deals with Bits?

ANSWER
Layer 1 - Physical



Question 12.
Which layer of the OSI model do switches operate at?

ANSWER
Layer 2 - Data Link



Question 13.
Which layer of the OSI model do hubs operate at?

ANSWER
Layer 1 - Physical




2

,Question 14.
Which layer of the OSI model do Repeaters operate at?

ANSWER
Layer 1 - Physical



Question 15.
Which layer of the OSI model do Wireless Access Points (WAP) operate at?

ANSWER
Layer 2- Data Link



Question 16.
Which layer of the OSI model do Bridges operate at?

ANSWER
Layer 2 - Data Link



Question 17.
Which layer of the OSI model do Wireless Range Extenders operate at?

ANSWER
Layer 1 - Physical



Question 18.
Which layer of the OSI model do Router's operate at?

ANSWER
Layer 3 - Network



Question 19.
Which layer of the OSI model do Modem's operate at?

ANSWER
Layer 1 - Physical



Question 20.
Which layer of the OSI model do firewalls operate at?

ANSWER
Layer 3 - Network and Layer 4 - Transport




3

, Question 21.
A _______ is a layer 2 device that connects devices within a LAN and forwards frames based on
MAC addresses. It learns which MAC is on which port and uses that table to send traffic only to
the correct device.

ANSWER
What does a switch do?



Question 22.
A _______ is a basic Layer 1 device that repeats incoming signals out all ports. It does not use
MAC addresses and sends traffic to every device. a weak signal to extend the distance it can
travel.

ANSWER
What does a hub do?



Question 23.
A _______ is a layer 2 device that connects wireless devices to the wired network. It uses MAC
addresses to forward traffic between wireless clients and the LAN.

ANSWER
What does a Wireless Access Point (WAP) do?



Question 24.
A _______ is a Layer 2 device that connects two LAN segments and uses MAC addresses to
decide whether to forward or block traffic, reducing collisions.

ANSWER
What does a Bridge do?



Question 25.
A ________ is a Layer 1 device that listens to the wireless signal from a WAP and rebroadcasts it
to extend coverage. It works like a wireless repeater and does not use MAC addresses.

ANSWER
What does a Wireless Range Extender (WRE) do?



Question 26.
A ______ is a Layer 3 device that moves data between different IP networks. It uses IP addresses
and each ______ interface connects to a different network, allowing traffic to be routed from one
network to another.

ANSWER
What does a router do?




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