The Bits and Bytes of Computer Networking
What is the protocol data unit for the data link layer?
Frames
What is the protocol for the network layer?
IP
what addresses does the network layer use?
IP addresses
What is IP?
Internet Protocol
What is the network layer?
Internet; allows different networks to communicate with each other through devices known as routers
A user is operating Client A and sends a message to Client B. What is used to identify the node the transmission is meant for?
MAC Addresss
What addresses does the data link layer use?
MAC Adresses
What is the third layer of the TCP/IP network model?
Network
What is the first layer of the TCP/IP network model?
Physical
What is the addressing of the of the transport layer?
Port #'s
Which section in an ethernet frame contains the data from higher layers, such as Internet Protocol (IP) and the transport and application layers?
Preamble
What device forwards data and operates at layer three of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
Router
What is the protocol data unit for the transport layer?
Segment
You get in your car after work and turn on the radio. What type of communication does the radio use?
Simplex
Application layer
Software that we use, the part of the model that is closest to the user (gmail, browser, etc.)
What is the protocol for the physical layer?
10 Base T, 802.11
Preamble
8 bytes (or 64 bits) long, and can itself be split into two sections
Hexadecimal
A base-16 number system that uses sixteen distinct symbols 0-9 and A-F to represent numbers from 0 to 15.
protocol
A set of rules governing the exchange or transmission of data between devices.
cross talk
A type of interference caused by signals traveling on nearby wire pairs infringing on another pair's signal.
What is the fifth layer of the TCP/IP network model?
Application
What is the Protocol data unit for the physical layer
Bits
What will allow you to form point-to-point networking connections?
Cables
What is used to determine when the communications channels are clear and when a device is free to transmit data?
Carrier sense multiple access with collision detection csma-cd
What is the second layer of the TCP/IP network model?
Data Link
What is the protocol data unit for the network layer?
Datagram
What section in an ethernet frame will you find a Virtual Local Area Network (VLAN) header?
EtherType field
What is the Protocol for the data link layer?
Ethernet and Wi-Fi
broadcast
Ethernet broadcast is sent to every single device on a LAN
What is the protocol for the transport layer?
TCP/UDP
Duplex Communication
The concept that information can flow in both directions across the cable.
What is the most common plug used with twisted pair network cables?
The most common twisted-pair connector is an 8-position, 8-contact (8P8C) modular plug and jack commonly referred to as an RJ45 connector
What is TCP?
Transmission Control Protocol
What is the fourth layer of the TCP/IP network model?
Transport
UDP
User Datagram Protocol
data packet
any single set of binary data being sent across a network link
Copper Cable
cable that transmits signals using electricity
Which layer abstracts away the need for any other layers to care about what hardware is in use?
data link
what is the data link layer?
defining a common way of interpreting these signals. Ethernet; wireless technologies
What immediately follows the Start Frame Delimiter in an ethernet frame?
destinatino media access control or MAC address
Where is the Start Frame Delimiter (SFD) found in an ethernet frame?
last frame in the preamble
Start Frame Delimiter (SFD)
marks the end of the timing information and start of the frame
unicast
one device to transmit data to one other device
client
requests data, and a server responds to that request
Data Link Layer
responsible for defining a common way of interpreting signals so network devices can communicate
mulitcast
set to all devices on the local network signal
What is the purpose of the transport layer?
sort out which client and server programs are supposed to get which data
What is the physical layer?
the physical devices that interconnect computers; cabling, connectors, and sending signals
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes?
transport