C172 - Network and Security
Foundations Questions And Answers
2023
Application Layer Ans- Interacts with application programs that incorporate a communication
component such as your internet browser and email.
Bus Topology Ans- The computers share the media (coaxial cable) for data transmission.
Cable Modem Ans- A modem that can use the high bandwidth of a cable television system to deliver
high-speed data to and from the service provider.
CAT6 (category 6) Ans- Twisted-pair cables capable of carrying up to 1000Mbps (1 gigabit) of data up to
a length of 100 meters.
Crossover Ans- Transmit and receive signal pairs are crossed to properly align the transmit signal on one
device with the receive signal on the other device.
CSMA/CD Ans- Carrier sense multiple access with collision detection is the Ethernet LAN media-access
method.
Data Link Layer Ans- Layer of the OSI reference model that handles error recovery, flow control
(synchronization), and sequencing.
Deterministic Ans- Access to the network is provided at fixed time intervals.
Ethernet, Physical, Hardware, or Adapter Address Ans- Other names for the MAC address.
Firewall Protection Ans- Used to prevent unauthorized access to your network.
Host Address Ans- Same as host number.
,Host Number Ans- The portion of the IP address that defines the location of the networking device
connected to the network; also called the host address.
Hotspots Ans- A limited geographic area that provides wireless access for the public.
Hub Ans- Broadcasts the data it received to all devices connected to its ports.
IANA Ans- The Internet Assigned Numbers Authority is the agency that assigns IP addresses to computer
networks.
ICMP Ans- Internet Control Message Protocol.
IEEE Ans- Institute of Electrical and Electronics Engineers, one of the major standards-setting bodies for
technological development.
Intranet Ans- An internal network that provides file and resource sharing but is not accessed from the
Internet.
IP Address Ans- Unique 32-bit address that identifies on which network the computer is located as well
as differentiates the computer from all other devices on the same network.
IP Internetwork Ans- A network that uses IP addressing for identifying devices connected to the
network.
ipconfig /all Ans- Enables the MAC address information to be displayed from the command prompt.
ISP Ans- Internet service provider.
Link Integrity Test Ans- Protocol used to verify that a communication link between two Ethernet devices
has been established.
,Link Light Ans- Indicates that the transmit and receive pairs are properly aligned.
Link Pulses Ans- Sent by each of the connected devices via the twisted-pair cables when data is not
being transmitted to indicate that the link is still up.
Local Area Network (LAN) Ans- Network of users that share computer resources in a limited area.
MAC Address Ans- A unique 6-byte address assigned by the vendor of the network interface card.
Mbps Ans- Megabits per second
Mesh Topology Ans- All networking devices are directly connected to each other.
Multiport Repeater Ans- Another name for a hub.
Network Address Translation (NAT) Ans- Translates the private IP address to a public address for routing
over the Internet.
Network Interface Card (NIC) Ans- The electronic hardware used to interface the computer to the
network.
Network Layer Ans- Accepts outgoing messages and combines messages or segments into packets,
adding a header that includes routing information.
Network Number Ans- The portion of the IP address that defines which network the IP packet is
originating from or being delivered to.
Organizationally Unique Identifier (OUI) Ans- The first 3-bytes of the MAC address that identifies the
manufacturer of the network hardware.
, OSI Ans- Open system interconnect.
OSI Model Ans- The seven layers describing network functions.
Overloading Ans- Where NAT translates the home network's private IP addresses to a single public IP
address.
Packet Ans- Provides grouping of the information for transmission.
Physical Layer Ans- Layer of the OSI reference model that provides the electrical and mechanical
connection to the network. Describes the media that interconnects networking devices.
Ping Ans- Command used to test that a device on the network is reachable.
Port Address Translation (PAT) Ans- A port number is tracked with the client computer's private address
when translating to a public address.
Ports Ans- The physical input/output interfaces to the networking hardware.
Presentation Layer Ans- Layer of the OSI reference model that accepts and structures the messages for
the application.
Private Addresses Ans- IP addresses set aside for use in private intranets.
Protocol Ans- Set of rules established for users to exchange information.
Range Extender Ans- Device that relays the wireless signals from an access point or wireless router into
areas with a weak signal or no signal at all.
RJ-45 Ans- The 8-pin modular connector used with CAT6/5e/5 cable.
Foundations Questions And Answers
2023
Application Layer Ans- Interacts with application programs that incorporate a communication
component such as your internet browser and email.
Bus Topology Ans- The computers share the media (coaxial cable) for data transmission.
Cable Modem Ans- A modem that can use the high bandwidth of a cable television system to deliver
high-speed data to and from the service provider.
CAT6 (category 6) Ans- Twisted-pair cables capable of carrying up to 1000Mbps (1 gigabit) of data up to
a length of 100 meters.
Crossover Ans- Transmit and receive signal pairs are crossed to properly align the transmit signal on one
device with the receive signal on the other device.
CSMA/CD Ans- Carrier sense multiple access with collision detection is the Ethernet LAN media-access
method.
Data Link Layer Ans- Layer of the OSI reference model that handles error recovery, flow control
(synchronization), and sequencing.
Deterministic Ans- Access to the network is provided at fixed time intervals.
Ethernet, Physical, Hardware, or Adapter Address Ans- Other names for the MAC address.
Firewall Protection Ans- Used to prevent unauthorized access to your network.
Host Address Ans- Same as host number.
,Host Number Ans- The portion of the IP address that defines the location of the networking device
connected to the network; also called the host address.
Hotspots Ans- A limited geographic area that provides wireless access for the public.
Hub Ans- Broadcasts the data it received to all devices connected to its ports.
IANA Ans- The Internet Assigned Numbers Authority is the agency that assigns IP addresses to computer
networks.
ICMP Ans- Internet Control Message Protocol.
IEEE Ans- Institute of Electrical and Electronics Engineers, one of the major standards-setting bodies for
technological development.
Intranet Ans- An internal network that provides file and resource sharing but is not accessed from the
Internet.
IP Address Ans- Unique 32-bit address that identifies on which network the computer is located as well
as differentiates the computer from all other devices on the same network.
IP Internetwork Ans- A network that uses IP addressing for identifying devices connected to the
network.
ipconfig /all Ans- Enables the MAC address information to be displayed from the command prompt.
ISP Ans- Internet service provider.
Link Integrity Test Ans- Protocol used to verify that a communication link between two Ethernet devices
has been established.
,Link Light Ans- Indicates that the transmit and receive pairs are properly aligned.
Link Pulses Ans- Sent by each of the connected devices via the twisted-pair cables when data is not
being transmitted to indicate that the link is still up.
Local Area Network (LAN) Ans- Network of users that share computer resources in a limited area.
MAC Address Ans- A unique 6-byte address assigned by the vendor of the network interface card.
Mbps Ans- Megabits per second
Mesh Topology Ans- All networking devices are directly connected to each other.
Multiport Repeater Ans- Another name for a hub.
Network Address Translation (NAT) Ans- Translates the private IP address to a public address for routing
over the Internet.
Network Interface Card (NIC) Ans- The electronic hardware used to interface the computer to the
network.
Network Layer Ans- Accepts outgoing messages and combines messages or segments into packets,
adding a header that includes routing information.
Network Number Ans- The portion of the IP address that defines which network the IP packet is
originating from or being delivered to.
Organizationally Unique Identifier (OUI) Ans- The first 3-bytes of the MAC address that identifies the
manufacturer of the network hardware.
, OSI Ans- Open system interconnect.
OSI Model Ans- The seven layers describing network functions.
Overloading Ans- Where NAT translates the home network's private IP addresses to a single public IP
address.
Packet Ans- Provides grouping of the information for transmission.
Physical Layer Ans- Layer of the OSI reference model that provides the electrical and mechanical
connection to the network. Describes the media that interconnects networking devices.
Ping Ans- Command used to test that a device on the network is reachable.
Port Address Translation (PAT) Ans- A port number is tracked with the client computer's private address
when translating to a public address.
Ports Ans- The physical input/output interfaces to the networking hardware.
Presentation Layer Ans- Layer of the OSI reference model that accepts and structures the messages for
the application.
Private Addresses Ans- IP addresses set aside for use in private intranets.
Protocol Ans- Set of rules established for users to exchange information.
Range Extender Ans- Device that relays the wireless signals from an access point or wireless router into
areas with a weak signal or no signal at all.
RJ-45 Ans- The 8-pin modular connector used with CAT6/5e/5 cable.
