2024 NETWORK AND SECURITY
FOUNDATIONS - D315 EXAM WITH
CORRECT ANSWERS
OSI - CORRECT ANSWERS-model that enables transmission of data among
hosts on a network; widely used in network documentation and discussions
OSI layers - CORRECT ANSWERS-Application, Presentation, Session,
Transport, Network, Data Link, Physical
Open Systems Interconnection (OSI) - CORRECT ANSWERS-OSI acronym
Hub - CORRECT ANSWERS-device that connects the router to the network;
takes the data packets from the router and sends them to all devices
connected on the network (e.g. USB hub)
Unshielded Twisted Pair (UTP) - CORRECT ANSWERS-the tighter the twists of
cables, the lesser electrical interference that occurs and higher the category
of the cable
TCP/IP - CORRECT ANSWERS-model that is a common set of protocol
standards that permits the appropriate transmission of data; used for
practical application when locating specific protocol
TCP/IP layers - CORRECT ANSWERS-application, transport, network, network
interface
TCP Transport Layer - CORRECT ANSWERS-responsible for end-to-end
transport data; TCP and UDP
TCP Network Layer - CORRECT ANSWERS-logical transmission protocols for
the whole network; IP, Internet Control Message Protocol (ICMP), address
resolution protocol (ARP)
TCP Network Interface Layer - CORRECT ANSWERS-establishes how the data
should be physically sent through the network
,OSI - Network Layer - CORRECT ANSWERS-responsible for the transmission of
data between hosts in different networks as well as routing data packets; use
routers and some switches
OSI - Transport Layer - CORRECT ANSWERS-receives services from network
layer and provides services to the application layer; responsible for reliable
delivery of data; segments and reassembles data in the correct order for it to
be sent to the receiving device; handle reliable delivery of data that are lost
or corrupted (TCP does this); heart of OSI
Switch - CORRECT ANSWERS-found with OSI data link; standalone or
integrated with other devices; keeps traffic between the source and
destination ports from interfering with other devices on the network;
Router - CORRECT ANSWERS-found with OSI network layer; connect home
network to the internet; connect web server to database server;
Firewalls - CORRECT ANSWERS-found in OSI layers data link, network,
transport, session, and application; defines what traffic should go between
two networks; can be software that runs in virtual machine or physical server
like hardware
Firewall Layer 4 - CORRECT ANSWERS-operates the network and transport
layers;
Firewall Layer 7 - CORRECT ANSWERS-operates at session, presentation, and
application layers; decrypt and analyze the content flowing through
Modem - CORRECT ANSWERS-A device necessary for sending and receiving
data. Allows computers to transport digital information over analog lines,
such as phone or cable lines; DSL or satelite; found in data link and physical
Repeater - CORRECT ANSWERS-A device used to strengthen, replicate, and
regenerate signals that are weakened during transmission; range extender is
a form that takes distored Wi-Fi signal and transmits it to the formerly dead
zone in large homes
TCP and OSI - CORRECT ANSWERS-set of procedures that sends data from
one host to another. Can be done over the internet, network, or any form of
communication
TCP Network Interface Layer - CORRECT ANSWERS-Physical cabling and
wireless spectrum
, OSI - Physical Layer - CORRECT ANSWERS-cables and connectors; establishes
how a signal is transmitted via wires or airwaves; responsible for the physical
connections of the devices in a network; use hubs, repeaters, modem
devices and cabling
OSI - Data link layer - CORRECT ANSWERS-contains network card and Media
Access Control (MAC) address; responsible for error-free delivery of data to
the receiving device or node; switches, bridges, or wireless/wired network
cards
Network Layer (TCP and OSI) - CORRECT ANSWERS-Internet Protocol and
Internet Control Message Protocol (ICMP); define one protocol versus another
for connecting networks
Transport Layer (TCP and OSI) - CORRECT ANSWERS-ensures data is
transferred to the correct application; Transmission Control Protocol (TCP) or
User Diagram Protocol (UDP)
Transmission Control Protocol (TCP) - CORRECT ANSWERS-type of transport
layer; verifies data and resends if not delivered
User Diagram Protocol (UDP) - CORRECT ANSWERS-type of transport layer;
unreliable to the extent that it does not guarantee redelivery of the data;
preferred in audio streaming
TCP - Application Layer - CORRECT ANSWERS-HTTP for a web broswer; SMTP
for email; DNS; Secure Shell (SSH); network time protocol (NTP);
communication protocol between nodes
OSI - Session Layer - CORRECT ANSWERS-establishes the session and
ensures things are working correctly end-to-end
OSI - Presentation Layer - CORRECT ANSWERS-takes care of data encryption;
translating data from the application layer into format required to transmit
data;
OSI - Application Layer - CORRECT ANSWERS-HTTP; DNS; File transfer
protocol (FTP); responsible for network application; production of data to be
transferred over the network
OSI layers by number - CORRECT ANSWERS-Physical 1; Data Link 2; Network
3; Transport 4; Session 5; Presentation 6; Application 7
Cat 3 cables - CORRECT ANSWERS-oldest UTP; analog phones; 10 mbps
FOUNDATIONS - D315 EXAM WITH
CORRECT ANSWERS
OSI - CORRECT ANSWERS-model that enables transmission of data among
hosts on a network; widely used in network documentation and discussions
OSI layers - CORRECT ANSWERS-Application, Presentation, Session,
Transport, Network, Data Link, Physical
Open Systems Interconnection (OSI) - CORRECT ANSWERS-OSI acronym
Hub - CORRECT ANSWERS-device that connects the router to the network;
takes the data packets from the router and sends them to all devices
connected on the network (e.g. USB hub)
Unshielded Twisted Pair (UTP) - CORRECT ANSWERS-the tighter the twists of
cables, the lesser electrical interference that occurs and higher the category
of the cable
TCP/IP - CORRECT ANSWERS-model that is a common set of protocol
standards that permits the appropriate transmission of data; used for
practical application when locating specific protocol
TCP/IP layers - CORRECT ANSWERS-application, transport, network, network
interface
TCP Transport Layer - CORRECT ANSWERS-responsible for end-to-end
transport data; TCP and UDP
TCP Network Layer - CORRECT ANSWERS-logical transmission protocols for
the whole network; IP, Internet Control Message Protocol (ICMP), address
resolution protocol (ARP)
TCP Network Interface Layer - CORRECT ANSWERS-establishes how the data
should be physically sent through the network
,OSI - Network Layer - CORRECT ANSWERS-responsible for the transmission of
data between hosts in different networks as well as routing data packets; use
routers and some switches
OSI - Transport Layer - CORRECT ANSWERS-receives services from network
layer and provides services to the application layer; responsible for reliable
delivery of data; segments and reassembles data in the correct order for it to
be sent to the receiving device; handle reliable delivery of data that are lost
or corrupted (TCP does this); heart of OSI
Switch - CORRECT ANSWERS-found with OSI data link; standalone or
integrated with other devices; keeps traffic between the source and
destination ports from interfering with other devices on the network;
Router - CORRECT ANSWERS-found with OSI network layer; connect home
network to the internet; connect web server to database server;
Firewalls - CORRECT ANSWERS-found in OSI layers data link, network,
transport, session, and application; defines what traffic should go between
two networks; can be software that runs in virtual machine or physical server
like hardware
Firewall Layer 4 - CORRECT ANSWERS-operates the network and transport
layers;
Firewall Layer 7 - CORRECT ANSWERS-operates at session, presentation, and
application layers; decrypt and analyze the content flowing through
Modem - CORRECT ANSWERS-A device necessary for sending and receiving
data. Allows computers to transport digital information over analog lines,
such as phone or cable lines; DSL or satelite; found in data link and physical
Repeater - CORRECT ANSWERS-A device used to strengthen, replicate, and
regenerate signals that are weakened during transmission; range extender is
a form that takes distored Wi-Fi signal and transmits it to the formerly dead
zone in large homes
TCP and OSI - CORRECT ANSWERS-set of procedures that sends data from
one host to another. Can be done over the internet, network, or any form of
communication
TCP Network Interface Layer - CORRECT ANSWERS-Physical cabling and
wireless spectrum
, OSI - Physical Layer - CORRECT ANSWERS-cables and connectors; establishes
how a signal is transmitted via wires or airwaves; responsible for the physical
connections of the devices in a network; use hubs, repeaters, modem
devices and cabling
OSI - Data link layer - CORRECT ANSWERS-contains network card and Media
Access Control (MAC) address; responsible for error-free delivery of data to
the receiving device or node; switches, bridges, or wireless/wired network
cards
Network Layer (TCP and OSI) - CORRECT ANSWERS-Internet Protocol and
Internet Control Message Protocol (ICMP); define one protocol versus another
for connecting networks
Transport Layer (TCP and OSI) - CORRECT ANSWERS-ensures data is
transferred to the correct application; Transmission Control Protocol (TCP) or
User Diagram Protocol (UDP)
Transmission Control Protocol (TCP) - CORRECT ANSWERS-type of transport
layer; verifies data and resends if not delivered
User Diagram Protocol (UDP) - CORRECT ANSWERS-type of transport layer;
unreliable to the extent that it does not guarantee redelivery of the data;
preferred in audio streaming
TCP - Application Layer - CORRECT ANSWERS-HTTP for a web broswer; SMTP
for email; DNS; Secure Shell (SSH); network time protocol (NTP);
communication protocol between nodes
OSI - Session Layer - CORRECT ANSWERS-establishes the session and
ensures things are working correctly end-to-end
OSI - Presentation Layer - CORRECT ANSWERS-takes care of data encryption;
translating data from the application layer into format required to transmit
data;
OSI - Application Layer - CORRECT ANSWERS-HTTP; DNS; File transfer
protocol (FTP); responsible for network application; production of data to be
transferred over the network
OSI layers by number - CORRECT ANSWERS-Physical 1; Data Link 2; Network
3; Transport 4; Session 5; Presentation 6; Application 7
Cat 3 cables - CORRECT ANSWERS-oldest UTP; analog phones; 10 mbps
