WGU C172 Network and Security – Foundations; PA
and OA (2022/2023) Satisfaction Guaranteed
It is a network of users that share computer resources in a limited area. – LAN
Local Area Network – LAN
How are Local Area Networks defined? – In terms of protocol and the topology used for accessing
the network.
A set of rules established for users to exchange information – Protocol
The network architecture used to interconnect the networking equipment. – Topology
What are the most common topologies for LANs? – Ring, Bus, and Star
Uses a token that is placed in the data channel and circulates around the ring. – Token Ring topology
A deterministic network – Token Ring Topology
Each station connected to the network ensures access for transmission of its messages at regular or
fixed time intervals – Deterministic
What are the disadvantages of the Token Ring system? – 1. If an error changes the token pattern, it
can cause the token to stop circulating.
What is a disadvantage of the Token Ring system from the troubleshooting and maintenance? – 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.
What is a solution to the troubleshooting and maintenance disadvantages of the Token Ring
system? – Connect each computer or device on the network to a central token ring hub.
A device that manages the passing of the token instead of relying on individual computers to pass it.
- Token ring hub
How does the token ring hub improve the network? – It improves the reliability of the network.
Topology whereas the computers share the media or coaxial cable for data transmission. – Bus
topology
The coaxial cable that is looped through each networking device to transmit data in a bus topology –
ThinNet
In this topology, all devices on the network can see each other’s data traffic. – Bus topology
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. – Bus topology
What are the disadvantages of a bus topology? – “1. Data can be corrupted if ore than one device on
the network transmits at the same time and will have to be resubmitted.
- The use of the shared coaxial cable prevents data transmission from being very bandwidthefficient.”
Which topology is seldomly used in modern networks? – Bus topology
What is the most common topology used in today’s LANs? – Star 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 – Star
A switch or hub facilitates the transfer of data between networking devices in this topology – star
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 – hub
A transmission from a hub in a star network to all the devices in the network connected to the hub –
broadcast
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 – switch
The physical input/output interfaces to the networking hardware – port
Where the cables physically connect to each other or a central switch or hub – Port
Only the intended destination device on this network will see the data traffic – star
What is an advantage of the star topology? – It improves the efficiency of the available bandwidth of
the network
What is an advantage of the star topology from the troubleshooting and maintenance? – A device
can be removed or added without disrupting other devices on the network
All devices are connected to each other – mesh topology
What is an advantage of the mesh network? – It provides full redundancy in the network data paths