WGU D315 NETWORK AND SECURITY
FOUNDATIONS EXAM GUIDE, COMPLETE
STUDY MATERIALS, PRACTICE QUESTIONS
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[EXAM• STUDY GUIDE • SUMMARY • ASSIGNMENT]
A clean, organized resource designed for easy revision and reference.
QUICK • CLEAR • PROFESSIONAL
,LAN It is a network of users that share computer resources in a limited area.
Local Area Network A network of users that share computer resources in a limited area.
Definition of Local Area Networks In terms of protocol and the topology used for accessing the network.
Protocol A set of rules established for users to exchange information.
Topology The network architecture used to interconnect the networking equipment.
Common topologies for LANs Ring, Bus, and Star.
Token Ring topology Uses a token that is placed in the data channel and circulates around the ring.
Deterministic network A network where each station connected to the network ensures access for transmission
of its messages at regular or fixed time intervals.
Disadvantages of the Token Ring system 1. If an error changes the token pattern, it can cause the token to stop circulating.
Troubleshooting disadvantage of Token Ring The token ring path must be temporarily broken or interrupted if a computer or any
device on the network is to be removed or added to the network.
Solution to Token Ring troubleshooting Connect each computer or device on the network to a central token ring hub.
Token ring hub A device that manages the passing of the token instead of relying on individual
computers to pass it.
Improvement by token ring hub It improves the reliability of the network.
Bus topology Topology whereas the computers share the media or coaxial cable for data transmission.
ThinNet The coaxial cable that is looped through each networking device to transmit data in a bus
topology.
, Bus topology data visibility In this topology, all devices on the network can see each other's data traffic.
Bus topology transmission Topology whereas each computer must wait for pauses in transmission or until the
transmission from one device is complete before initiating a new transmission onto the
network.
Disadvantages of bus topology 1. Data can be corrupted if more than one device on the network transmits at the same
time and will have to be resubmitted. 2. The use of the shared coaxial cable prevents data
transmission from being very bandwidth-efficient.
Seldom used topology Bus topology.
Most common topology in today's LANs Star topology.
Twisted-pair cables topology Topology that uses twisted-pair cables with modular plugs to connect computers and
other networking devices.
Star topology Topology whereas each device is connected to a switch or hub.
Hub Transmits data to all the devices connected in the star network.
Hub Also called a multiport repeater.
Hub Not meant for large networks, but are still used in some smaller, slower speed LANs.
Broadcast A transmission from a hub in a star network to all the devices in the network connected to
the hub.
Switch Stores the hardware or physical address for each device connected to its ports in a star
network.
Switch Sends data transmissions directly to the port of the destination device on the network.
Port The physical input/output interfaces to the networking hardware.
Port Where the cables physically connect to each other or a central switch or hub.
FOUNDATIONS EXAM GUIDE, COMPLETE
STUDY MATERIALS, PRACTICE QUESTIONS
& ANSWERS | COMPREHENSIVE EXAM
PREP
| GRADED A+ | GUARANTEED SUCCESS
UPDATED QUESTIONS AND ANSWERS
100% VERIFIED EXAM PREP
[EXAM• STUDY GUIDE • SUMMARY • ASSIGNMENT]
A clean, organized resource designed for easy revision and reference.
QUICK • CLEAR • PROFESSIONAL
,LAN It is a network of users that share computer resources in a limited area.
Local Area Network A network of users that share computer resources in a limited area.
Definition of Local Area Networks In terms of protocol and the topology used for accessing the network.
Protocol A set of rules established for users to exchange information.
Topology The network architecture used to interconnect the networking equipment.
Common topologies for LANs Ring, Bus, and Star.
Token Ring topology Uses a token that is placed in the data channel and circulates around the ring.
Deterministic network A network where each station connected to the network ensures access for transmission
of its messages at regular or fixed time intervals.
Disadvantages of the Token Ring system 1. If an error changes the token pattern, it can cause the token to stop circulating.
Troubleshooting disadvantage of Token Ring The token ring path must be temporarily broken or interrupted if a computer or any
device on the network is to be removed or added to the network.
Solution to Token Ring troubleshooting Connect each computer or device on the network to a central token ring hub.
Token ring hub A device that manages the passing of the token instead of relying on individual
computers to pass it.
Improvement by token ring hub It improves the reliability of the network.
Bus topology Topology whereas the computers share the media or coaxial cable for data transmission.
ThinNet The coaxial cable that is looped through each networking device to transmit data in a bus
topology.
, Bus topology data visibility In this topology, all devices on the network can see each other's data traffic.
Bus topology transmission Topology whereas each computer must wait for pauses in transmission or until the
transmission from one device is complete before initiating a new transmission onto the
network.
Disadvantages of bus topology 1. Data can be corrupted if more than one device on the network transmits at the same
time and will have to be resubmitted. 2. The use of the shared coaxial cable prevents data
transmission from being very bandwidth-efficient.
Seldom used topology Bus topology.
Most common topology in today's LANs Star topology.
Twisted-pair cables topology Topology that uses twisted-pair cables with modular plugs to connect computers and
other networking devices.
Star topology Topology whereas each device is connected to a switch or hub.
Hub Transmits data to all the devices connected in the star network.
Hub Also called a multiport repeater.
Hub Not meant for large networks, but are still used in some smaller, slower speed LANs.
Broadcast A transmission from a hub in a star network to all the devices in the network connected to
the hub.
Switch Stores the hardware or physical address for each device connected to its ports in a star
network.
Switch Sends data transmissions directly to the port of the destination device on the network.
Port The physical input/output interfaces to the networking hardware.
Port Where the cables physically connect to each other or a central switch or hub.
