CompTIA Network+ N10-008 Cert Guide (1st Edition, Anthony J. Sequeira) – Complete Test Bank with Answers

N10-008 Network+ Instructor’s Test Bank (Chapters 1-25)

(updated by Michael D. Taylor, Feb 2023)

Answer:and Explanation

References when used
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Chapter Links For Production Convenience

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25

Notes:

• Many questions were moved from one chapter into another one if it was appropriate. You will
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see this noted often.
• Other questions were not directly covered in the chapter, but are still considered important
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concepts to know for the Network+ exam and were topically related to the chapter content.
Those were moved to the end of the chapter and noted as ‘Bonus Questions’. Whether you
include them or not is up to you. I recommend using them to make the test bank for effective
to students actually taking the certification.
• Finally, where many questions were removed from a chapter, leaving too few questions,
additional questions were created from chapter content where possible. Some chapters are
short.
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,Chapter 1: OSI Model
1. At which OSI layer can a source MAC address be found in the Ethernet header?

a. Network layer
b. Transport layer
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c. Physical layer
d. Data link layer

Answer: d. Data link layer

2. The option of sending a group of segments at one time, instead of just one segment at a time, is
provided at what layer of the OSI reference model?
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a. Data link layer—using link aggregation
b. Network layer — using multiprotocol routing
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c. Transport layer— using Windowing
d. Physical layer—using interface bonding

Answer: c. Transport layer—using Windowing

Explanation: The key word was segments, a datagram term found at the Transport layer

3. The source IP address can be found in the header of a packet at this layer of the OSI reference
model
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a. Network layer
b. Session layer
c. Data link layer
d. Transport layer

Answer: a. Network layers
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4. Which of the following is a connectionless network layer protocol?

a. IP
b. TCP
c. UDP
d. SFTP
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Answer: a. IP

Explanation: UDP and TCP are Transport Layer. IP is Network layer and can only be made connection
oriented if coupled with TCP. When IP is coupled with UDP it is considered connectionless.
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5. What is the protocol of the address used by a router (at Layer 3) to identify specific devices?

a. MAC
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b. IP
c. LLC
d. ARP




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,Answer: b. IP

Explanation: The Internet Protocol (IP) address is used by routers (at Layer 3) to identify specific
devices on a network. This type of address, as opposed to a MAC address, is used across routed devices
(routers) (that is, the IP address typically does not change when traffic flows through a router).
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6. Which of the following can sequence a received set of segments correctly to reassemble a data
stream?

a. UDP
b. FTP
c. ICMP
d. TCP
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Answer: d. TCP
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7. Which of the following correctly describes encapsulation as opposed to decapsulation?

a. The data moves from the physical layer to application layer
b. A header is added at the beginning of a packet.
c. The frame header and trailer are stripped off
d. The packets are sent to the transport to be reassembled.
e. A port number is identified and the data associated with an application.

Answer: b. A header is added at the beginning of a packet.
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Explanation: As data moves down through the OSI model layers (on a host) it is encapsulated with a
header at each OSI Layer whether it be a segment, packet, or frame.

8. Which layer of the OSI reference model enforces the Maximum Transmission Unit (MTU) size
allowed for transmitted frames?
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a. Network layer
b. Transport layer
c. Physical layer
d. Data Link Layer

Answer: d. Data link layer
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9. A Protocol Data Unit (PDU) refers to payload data with metadata fields that describe how the data
needs to be handled by the different OSI layers. What is the name of the PDU in the physical
layer of the OSI reference model?

a. Segment
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b. Frames
c. Bits
d. Packet
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Answer: c. Bits




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, 10. Which of the following is not a characteristic of the Media Access Control (MAC) sublayer of the
data link layer (Layer 2) of the OSI reference layered model?

a. The MAC sublayer uses a physical address called a MAC address, which is a 48-bit (6-byte) address
assigned to a device network interface card.
b. Layer 2 devices transmit to logical network addresses.
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c. Method of transmitting on the media.
d. The use of flow control on a network to prevent a receiver from being overwhelmed.

Answer: d. The use of flow control on a network to prevent a receiver from being overwhelmed.

11. Which of the following layers of the OSI reference model is primarily concerned with forwarding
data based on logical addresses?
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a. Physical layer
b. Data link layer
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c. Network layer
d. Presentation layer

Answer: c. Network layer

12. Which of the following transport layer protocol of the OSI reference model is a connection-
oriented protocol that provides reliable transport between two communicating hosts?

a. Transmission Control Protocol (TCP)
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b. Transport Control Protocol (TCP)
c. User datagram Protocol (UDP)
d. Internetwork Packet Exchange (IPX)

Answer: a. Transmission Control Protocol (TCP)
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13. Which OSI reference model layer is responsible for the following?

• Setting up a session Formatted: Not Highlight
• Maintaining a session
• Tearing down a session
a. Presentation layer (Layer 6)
b. Data link layer (Layer 2)
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c. Session layer (Layer 5)
d. Transport layer (layer 4)

Answer: c. Session layer (Layer 5)

14. ABC Corporation is changing the format of text from American Standard Code for Information
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Interchange (ASCII) to Extended Binary Code Decimal Interchange Code (EBCDIC). They also
requested that confidential files on servers be protected by applying an appropriate encryption.
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What OSI reference model layer is responsible for formatting the data encryption?

a. Presentation layer (Layer 6)
b. Data-link layer (Layer 2)




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