WGU D315 WGU Cohort 1 Lessons 1-7 for
Network and Security | New Update 2026/27 |
Graded A+
Hub
"Dumb" a hub connects the router to the network, takes the data packets from
the router, and sends then to all the devices connected on the network. An
example: USB hub. This sits at the physical layer, or first layer of the OSI model. It
eats up badwidth more than a switch.
Swtch
"Smart" build a table of MAC addresses. Used to connect devices n a specific
network and allows them to communicate efficiently within a network. It uses less
bandwidth, so used more often. Sits at the second layer of the OSI model or the
Data Level.
Router
connects two or more differing networks, forwards packets (uses IP addresses) it
sits at the third lyer of OSI "network" level. can access through a wired ethernet or
wirelessly. (wired is far more secure)
Wireless Access Point
,used to interconnect wireless devices and provide a connection to the wired LAN.
sits at the Data-link layer of the OSI model.
Which device forwards data packets to all connected ports?
Switch, Router, Hub or Access Point
Hub
Which of the following devices passes data based on MAC addresses.
Switch
Network Topology
Refers to the geometric arrangement of the actual physical organization of the
computers and other network devices) in a network. what type of cables are used
as well.
Topology and protocols
The networking protocol is the set of rules established for users to gain contrtol of
the network to exchange information. The topology is the network architecture
used to interconnect the networking equipment.
Bus Topology
, A LAN configuration in which all nodes share a common line. They were created
before there was an Internet. Connected via a backbone or common data link.
CAble ends have to be terminated. Devices can only access the cable one at a time
"First come First Serve"
Bus Topology Disadvantages
-If there a problem with the central cable the whole network stops working.
-If there a lot of computers on the network, data travels more slowly so tasks are
completed slower.
-There can be data collisions as data has to travel in both directions along the
cable.
-There is a maximum length for how long the central cable can be and therefore a
limit on how many computers, printers etc can be connected to the network.
Ring Topology
Deterministic, meaning that the networking devices gain control of the network
iat fixed intervals. Not the first come first serve of Bus, Features Token passsing so
that they can gain control of the network in set intervals. Devices are daisy
chained to each other.
Bus Topology Advantages
-Cheap and easy to install and maintain as uses less cable than star & ring
networks.
Network and Security | New Update 2026/27 |
Graded A+
Hub
"Dumb" a hub connects the router to the network, takes the data packets from
the router, and sends then to all the devices connected on the network. An
example: USB hub. This sits at the physical layer, or first layer of the OSI model. It
eats up badwidth more than a switch.
Swtch
"Smart" build a table of MAC addresses. Used to connect devices n a specific
network and allows them to communicate efficiently within a network. It uses less
bandwidth, so used more often. Sits at the second layer of the OSI model or the
Data Level.
Router
connects two or more differing networks, forwards packets (uses IP addresses) it
sits at the third lyer of OSI "network" level. can access through a wired ethernet or
wirelessly. (wired is far more secure)
Wireless Access Point
,used to interconnect wireless devices and provide a connection to the wired LAN.
sits at the Data-link layer of the OSI model.
Which device forwards data packets to all connected ports?
Switch, Router, Hub or Access Point
Hub
Which of the following devices passes data based on MAC addresses.
Switch
Network Topology
Refers to the geometric arrangement of the actual physical organization of the
computers and other network devices) in a network. what type of cables are used
as well.
Topology and protocols
The networking protocol is the set of rules established for users to gain contrtol of
the network to exchange information. The topology is the network architecture
used to interconnect the networking equipment.
Bus Topology
, A LAN configuration in which all nodes share a common line. They were created
before there was an Internet. Connected via a backbone or common data link.
CAble ends have to be terminated. Devices can only access the cable one at a time
"First come First Serve"
Bus Topology Disadvantages
-If there a problem with the central cable the whole network stops working.
-If there a lot of computers on the network, data travels more slowly so tasks are
completed slower.
-There can be data collisions as data has to travel in both directions along the
cable.
-There is a maximum length for how long the central cable can be and therefore a
limit on how many computers, printers etc can be connected to the network.
Ring Topology
Deterministic, meaning that the networking devices gain control of the network
iat fixed intervals. Not the first come first serve of Bus, Features Token passsing so
that they can gain control of the network in set intervals. Devices are daisy
chained to each other.
Bus Topology Advantages
-Cheap and easy to install and maintain as uses less cable than star & ring
networks.
