Chapter 9 Communications and Networking Flashcards
What does bus topology look like
a central cable which terminates at each end with various devices attached to it
What does star topology look like?
A central switch which all the devices are connected to
Positives of star topology
High connection speed
Fewer collisions occur
Positives of Bus topology
Cheaper
Easier to add new devices
Negatives of bus topology
Collisions more likely
If bus cable breaks whole network fails
Less secure
Negatives of star topology
Expensive cabling costs
If central device fails, the whole network fails
What does a Network Interface Card (NIC) do?
It contains a MAC address used to uniquely identify the device
What does a switch do
directs packets of data to the correct recipient (using their mac address)
What hardware is needed to connect devices to a wired network
Network Interface Card (NIC)
Switch
What hardware is needed to connect devices to a wireless network?
Wireless Network Interface Card
Wireless access point
Which is more secure wired or wireless networks?
Wired
What are 3 ways you can improve your wireless security
Hide the SSID
Use strong encryption
Use Mac Address “Allow Listing”
What is data transmission?
The movement of data from one place to another.
What is Serial data transmission
single bits are sent along one wire one bit at a time
What is parallel data transmission?
Multiple bits are sent down several wires simultaneously
