WGU C172 Network and
Security – Foundations
questions well answered graded
A+
protocol - correct answer ✔✔The set of rules established for users to exchange information
topology - correct answer ✔✔The network architecture used to interconnect the networking
equipment
deterministic network - correct answer ✔✔Each station connected to the network is ensured
access for transmission of its messages at regular or fixed time intervals
bus topology - correct answer ✔✔The computers share the media (coaxial cable) for data
transmission
ThinNet - correct answer ✔✔The coaxial cable used in a bus network.
star topology - correct answer ✔✔Twisted-pair cables connect the devices to a central hub or
switch
hub - correct answer ✔✔A multiport repeater device used at the center of a star topology
multiport repeater - correct answer ✔✔The data it receives is broadcast and seen by all devices
connected to its ports. A hub.
,broadcast - correct answer ✔✔Transmission of data by a hub to all devices connected to its
ports
switch - correct answer ✔✔Device used at the center of a star topology that forwards a frame it
receives directly out the port associated with its destination address
mesh topology - correct answer ✔✔All networking devices are directly connected to each other,
allows for full redundancy
OSI model - correct answer ✔✔The seven layers describing network functions
Physical layer - correct answer ✔✔Provides the electrical and mechanical connection to the
network (cabling, NICs). 1st OSI layer
Data link layer - correct answer ✔✔Handles error recovery, flow control (synchronization), and
sequencing (MAC, Ethernet). 2nd OSI layer
Network layer - correct answer ✔✔Accepts outgoing messages and combines messages or
segments into packets, adding a header that includes routing information (IP, IPX). 3rd OSI layer
Transport layer - correct answer ✔✔Concerned with message integrity between source and
destination (TCP, UDP). 4th OSI layer
Session layer - correct answer ✔✔Provides the control functions necessary to establish,
manage, and terminate the connections (NSF, SQL). 5th OSI layer
Presentation layer - correct answer ✔✔Accepts and structures the messages for the application
(ASCII, JPEG). 6th OSI layer
, Application layer - correct answer ✔✔Interacts with application programs that incorporate a
communication component such as your Internet browser and email (HTTP, FTP, SMTP). 7th OSI
layer
3 basic steps to isolate network problem - correct answer ✔✔Is the connection to the machine
down? (layer 1)
Is the network down? (layer 3)
Is a service on a specific machine down? (layer 7)
CSMA/CD - correct answer ✔✔The Ethernet LAN media-access method, carrier sense multiple
access with collision detection
Ethernet - correct answer ✔✔LAN protocol created in 1972 and standardized in 1980 using
CSMA/CD.
Frame - correct answer ✔✔Contains the header, data, and trailer (the padding and 4-byte CRC
frame check sequence)
Frame header - correct answer ✔✔Consists of the preamble, start frame delimiter, destination
and source addresses, and length/type field
64 bytes - correct answer ✔✔Minimum length of an Ethernet frame
1518 bytes - correct answer ✔✔Maximum length of an Ethernet frame
MAC address - correct answer ✔✔A unique 6-byte/48-bit address assigned by the vendor of the
network interface card displayed in 12 hex digits
Security – Foundations
questions well answered graded
A+
protocol - correct answer ✔✔The set of rules established for users to exchange information
topology - correct answer ✔✔The network architecture used to interconnect the networking
equipment
deterministic network - correct answer ✔✔Each station connected to the network is ensured
access for transmission of its messages at regular or fixed time intervals
bus topology - correct answer ✔✔The computers share the media (coaxial cable) for data
transmission
ThinNet - correct answer ✔✔The coaxial cable used in a bus network.
star topology - correct answer ✔✔Twisted-pair cables connect the devices to a central hub or
switch
hub - correct answer ✔✔A multiport repeater device used at the center of a star topology
multiport repeater - correct answer ✔✔The data it receives is broadcast and seen by all devices
connected to its ports. A hub.
,broadcast - correct answer ✔✔Transmission of data by a hub to all devices connected to its
ports
switch - correct answer ✔✔Device used at the center of a star topology that forwards a frame it
receives directly out the port associated with its destination address
mesh topology - correct answer ✔✔All networking devices are directly connected to each other,
allows for full redundancy
OSI model - correct answer ✔✔The seven layers describing network functions
Physical layer - correct answer ✔✔Provides the electrical and mechanical connection to the
network (cabling, NICs). 1st OSI layer
Data link layer - correct answer ✔✔Handles error recovery, flow control (synchronization), and
sequencing (MAC, Ethernet). 2nd OSI layer
Network layer - correct answer ✔✔Accepts outgoing messages and combines messages or
segments into packets, adding a header that includes routing information (IP, IPX). 3rd OSI layer
Transport layer - correct answer ✔✔Concerned with message integrity between source and
destination (TCP, UDP). 4th OSI layer
Session layer - correct answer ✔✔Provides the control functions necessary to establish,
manage, and terminate the connections (NSF, SQL). 5th OSI layer
Presentation layer - correct answer ✔✔Accepts and structures the messages for the application
(ASCII, JPEG). 6th OSI layer
, Application layer - correct answer ✔✔Interacts with application programs that incorporate a
communication component such as your Internet browser and email (HTTP, FTP, SMTP). 7th OSI
layer
3 basic steps to isolate network problem - correct answer ✔✔Is the connection to the machine
down? (layer 1)
Is the network down? (layer 3)
Is a service on a specific machine down? (layer 7)
CSMA/CD - correct answer ✔✔The Ethernet LAN media-access method, carrier sense multiple
access with collision detection
Ethernet - correct answer ✔✔LAN protocol created in 1972 and standardized in 1980 using
CSMA/CD.
Frame - correct answer ✔✔Contains the header, data, and trailer (the padding and 4-byte CRC
frame check sequence)
Frame header - correct answer ✔✔Consists of the preamble, start frame delimiter, destination
and source addresses, and length/type field
64 bytes - correct answer ✔✔Minimum length of an Ethernet frame
1518 bytes - correct answer ✔✔Maximum length of an Ethernet frame
MAC address - correct answer ✔✔A unique 6-byte/48-bit address assigned by the vendor of the
network interface card displayed in 12 hex digits
