CompTIA Network+
Certification (Exam N10-007)
QUESTIONS WITH ANSWERS
What does OSI stand for? - CORRECT ANSWERS ✔✔Open
Systems Interconnection, which is a seven-layer network
model
What does TCP/IP stand for? - CORRECT ANSWERS
✔✔Transmission Control Protocol/Internet Protocol
Name the 7 layers of the OSI model in order (# & name) -
CORRECT ANSWERS ✔✔Layer 7 Application, Layer 6
Presentation, Layer 5 Session, Layer 4 Transport, Layer 3
Network, Layer 2 Data Link, Layer 1 Physical
Bottom-up mnemonic: "Please Do Not Throw Sausage
Pizza Away."
Top-down mnemonic: "All People Seem To Need Data
Processing."
What is UTP? - CORRECT ANSWERS ✔✔Unshielded
Twisted Pair cable. Usually contains four pairs of wires
that can transmit and receive data
,Define the Physical Layer of OSI - CORRECT ANSWERS
✔✔Layer 1 of the OSI model defines the method of
moving data between computers, so the cabling and
central box are part of the Physical layer (Layer 1).
Anything that moves data from one system to another,
such as copper cabling, fiber optics, even radio waves, is
part of the OSI Physical layer. Layer 1 doesn't care what
data goes through; it just moves the data from one
system to another system. NOTE: The NIC is NOT
considered part of the Physical Layer, but usually is part
of Layer 2 (Data Link).
What is a MAC address? - CORRECT ANSWERS ✔✔Inside
every NIC, burned onto some type of ROM chip, is special
firmware containing a unique identifier with a 48-bit value
called the media access control address, or MAC address.
No two NICs ever share the same MAC address—ever. Any
company that makes NICs must contact the Institute of
Electrical and Electronics Engineers (IEEE) and request a
block of MAC addresses, which the company then burns
into the ROMs on its NICs. Many NIC makers also print the
MAC address on the surface of each NIC.
Represented in hex, each hex being 4 bits, hence, 12 hex
chars make up the 48-bit MAC address value.
E.g. 00-40-05-60-7D-49
, The first six digits, in this example 00-40-05, represent
the number of the NIC manufacturer. Once the IEEE
issues those six hex digits to a manufacturer—referred to
as the Organizationally Unique Identifier (OUI)—no other
manufacturer may use them. The last six digits, in this
example 60-7D-49, are the manufacturer's unique serial
number for that NIC; this portion of the MAC is often
referred to as the device ID.
What are 2 other ways to refer to the MAC address? -
CORRECT ANSWERS ✔✔Most techs just call them MAC
addresses, as you should, but you might see MAC-48 or
EUI-48 on the CompTIA Network+ exam.
The Institute of Electrical and Electronics Engineers (IEEE)
forms MAC addresses from a numbering name space
originally called MAC-48, which simply means that the
MAC address will be 48 bits, with the first 24 bits defining
the OUI, just as described here. The current term for this
numbering name space is EUI-48. EUI stands for
Extended Unique Identifier.
How do NICs read computer data? - CORRECT ANSWERS
✔✔NICs send and receive the computer's binary data as
pulses of electricity, light, or radio waves. The NICs that
use electricity to send and receive data are the most
common, so let's consider that type of NIC.
Just think of a charge on the wire as a one and no charge
as a zero.
Certification (Exam N10-007)
QUESTIONS WITH ANSWERS
What does OSI stand for? - CORRECT ANSWERS ✔✔Open
Systems Interconnection, which is a seven-layer network
model
What does TCP/IP stand for? - CORRECT ANSWERS
✔✔Transmission Control Protocol/Internet Protocol
Name the 7 layers of the OSI model in order (# & name) -
CORRECT ANSWERS ✔✔Layer 7 Application, Layer 6
Presentation, Layer 5 Session, Layer 4 Transport, Layer 3
Network, Layer 2 Data Link, Layer 1 Physical
Bottom-up mnemonic: "Please Do Not Throw Sausage
Pizza Away."
Top-down mnemonic: "All People Seem To Need Data
Processing."
What is UTP? - CORRECT ANSWERS ✔✔Unshielded
Twisted Pair cable. Usually contains four pairs of wires
that can transmit and receive data
,Define the Physical Layer of OSI - CORRECT ANSWERS
✔✔Layer 1 of the OSI model defines the method of
moving data between computers, so the cabling and
central box are part of the Physical layer (Layer 1).
Anything that moves data from one system to another,
such as copper cabling, fiber optics, even radio waves, is
part of the OSI Physical layer. Layer 1 doesn't care what
data goes through; it just moves the data from one
system to another system. NOTE: The NIC is NOT
considered part of the Physical Layer, but usually is part
of Layer 2 (Data Link).
What is a MAC address? - CORRECT ANSWERS ✔✔Inside
every NIC, burned onto some type of ROM chip, is special
firmware containing a unique identifier with a 48-bit value
called the media access control address, or MAC address.
No two NICs ever share the same MAC address—ever. Any
company that makes NICs must contact the Institute of
Electrical and Electronics Engineers (IEEE) and request a
block of MAC addresses, which the company then burns
into the ROMs on its NICs. Many NIC makers also print the
MAC address on the surface of each NIC.
Represented in hex, each hex being 4 bits, hence, 12 hex
chars make up the 48-bit MAC address value.
E.g. 00-40-05-60-7D-49
, The first six digits, in this example 00-40-05, represent
the number of the NIC manufacturer. Once the IEEE
issues those six hex digits to a manufacturer—referred to
as the Organizationally Unique Identifier (OUI)—no other
manufacturer may use them. The last six digits, in this
example 60-7D-49, are the manufacturer's unique serial
number for that NIC; this portion of the MAC is often
referred to as the device ID.
What are 2 other ways to refer to the MAC address? -
CORRECT ANSWERS ✔✔Most techs just call them MAC
addresses, as you should, but you might see MAC-48 or
EUI-48 on the CompTIA Network+ exam.
The Institute of Electrical and Electronics Engineers (IEEE)
forms MAC addresses from a numbering name space
originally called MAC-48, which simply means that the
MAC address will be 48 bits, with the first 24 bits defining
the OUI, just as described here. The current term for this
numbering name space is EUI-48. EUI stands for
Extended Unique Identifier.
How do NICs read computer data? - CORRECT ANSWERS
✔✔NICs send and receive the computer's binary data as
pulses of electricity, light, or radio waves. The NICs that
use electricity to send and receive data are the most
common, so let's consider that type of NIC.
Just think of a charge on the wire as a one and no charge
as a zero.
