Bits & Bytes: Week 1, III & IV - Devices and the Physical Layer Flashcards
What is a patch panel often connected to?
A switch or router
ACRONYM:
8P8C
8 Position 8 Contact
True or false: servers can be clients and clients can be servers
True; almost all nodes can act as both at the same time
This Physical Layer device facilitates point-to-point (device A to device B) networking connections
Cables
What is the most common cable plug specifications in computer networking?
The RJ45
Which kind of cable is more likely to be found in a computer data center?
Fiber Optic Cables
ACRONYM:
BGP
Border Gateway Protocol
What kind of network communication takes place over a phonecall?
Duplex Communication
Another term for an ISP router
Core Router
ACRONYM:
LAN
Local Area Network
Fiber can also transport data over much longer distances than copper can without suffering
potential _____ _____.
Data Loss
ACRONYM:
RJ45
Registered Jack 45
Where is an RJ45 cable plugged in to connect?
a Network Port
What is the name of a device containing many network ports?
a Patch Panel
2 of the primary devices used to connect computers over a LAN
hubs and switches
What is the most common network cable?
Copper
the virtual roads of the internet
Networks
Difference between ISP router and home router
ISP routers have a greater number of internal tables of data and connect with many other routers
How is data transmitted using a fiber optic cable?
Via beams of light
What two categories do most network cables belong to?
Copper and fiber
What does the Cat in Cat 5, Cat 5e, and Cat 6 mean?
Category
What is a term for simultaneous sending and receiving of data over a network?
Full Duplex
The idea that information can flow in both directions across a cable
Duplex Communication
Which kind of cable is more likely to be found in a home or office network?
Copper cables
What is the term for when an electrical pulse on one wire is accidentally detected on another wire causing network errors?
Crosstalk
When a cable is properly connected to two devices that are both powered on, which LED will be lit?
the Link LED
a standard CAT 6 wire has _ wires consisting of _ different pairs inside of a single jacket
8, 4
This layer consists of devices and means of transmitting bits across computer networks
Physical Layer
What are the names of the three most common copper wire cables?
Cat 5, Cat 5e, and Cat 6
What allows devices on either end to understand that an electrical charge is a 0 in one state and a 1 in another?
Line Coding
What is a term for a network that takes turns when sending and receiving data (not simultaneous)?
Half-duplex
What are the cons of fiber optic cables?
They are more expensive and more fragile than copper cable
What are the two representations of a bit?
1 and 0
ACRONYM:
LAN
Local Area Network
a router stores information about where to send things in this.
An internal table
What is the process called where data moves in only one direction?
Simplex (or unidirectional) communication
How is data transmitted using a copper cable?
Via changes in electrical voltage between two ranges
What kind of cable typically uses an 8P8C connector?
An ethernet cable
LED lights can be helpful when ___________
Troubleshooting
What is the most common type of cabling used for connecting computing devices?
Twisted pair cabling
Cat __ cables transfer data over a shorter maximum distance but are the most reliable of the copper cables.
Cat 6
What is the smallest representation of data that a computer can understand
a Bit
a network segment where only one device can communicate at a time
Collision domain
a Data Link Level device that can inspect the contents being sent through the Ethernet
a Switch
When data is actively being transmitted across a cable, which LED will be lit?
the Activity LED
a Physical Layer device that allows for connections from many computers at once; allows devices to decide if data is for them or another device
Hub
What is the term for how routers share information about the most optimal path to send and receive data?
Border Gateway Protocol
a Level Three device that forwards data between independent networks
a Router
Which cable is more vulnerable to electromagnetic interference; fiber or copper?
Copper is more vulnerable
A way of varying the voltage of a charge moving across a cable
Modulation
This layer is responsible for multiplexing and demultiplexing traffic, establishing long running connections and ensuring data integrity through error
checking and data verification.
the Transport Layer
