WGU C172 NETWORK AND SECURITY - FOUNDATIONS; PA AND
OA SET*** QUESTIONS AND VERIFIED ANSWERS UPDATED
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.
2. The use of the shared coaxial cable prevents data transmission from being very
bandwidth-efficient."
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
OA SET*** QUESTIONS AND VERIFIED ANSWERS UPDATED
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.
2. The use of the shared coaxial cable prevents data transmission from being very
bandwidth-efficient."
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
