The Bits and Bytes of Computer Networking

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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


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