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CompTIA Network+ Certification (Exam
N10-007) Questions and Verified Answers
Q: What does OSI stand for?
ANS: Open Systems Interconnection, which is a seven-layer network model
Q:
What does TCP/IP stand for?
ANS: Transmission Control Protocol/Internet Protocol
Q:
Name the 7 layers of the OSI model in order (# & name)
ANS: 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 Pia Away."
Top-down mnemonic: "All People Seem To Need Data Processing."zz
Q:
What is UTP?
ANS: Unshielded Twisted Pair cable. Usually contains four pairs of wires that can
transmit and receive data
Q:
Define the Physical Layer of OSI
ANS: 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).
Q:
What is a MAC address?
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ANS: 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.
Q:
What are 2 other ways to refer to the MAC address?
ANS: 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.
Q:
How do NICs read computer data?
ANS: 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.
Q:
How does the network get the right data to the right system?
CompTIA Network+ Certification (Exam
N10-007) Questions and Verified Answers
Q: What does OSI stand for?
ANS: Open Systems Interconnection, which is a seven-layer network model
Q:
What does TCP/IP stand for?
ANS: Transmission Control Protocol/Internet Protocol
Q:
Name the 7 layers of the OSI model in order (# & name)
ANS: 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 Pia Away."
Top-down mnemonic: "All People Seem To Need Data Processing."zz
Q:
What is UTP?
ANS: Unshielded Twisted Pair cable. Usually contains four pairs of wires that can
transmit and receive data
Q:
Define the Physical Layer of OSI
ANS: 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).
Q:
What is a MAC address?
, Page | 2
ANS: 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.
Q:
What are 2 other ways to refer to the MAC address?
ANS: 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.
Q:
How do NICs read computer data?
ANS: 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.
Q:
How does the network get the right data to the right system?
