Podcast
Questions and Answers
Which of the following is an example of a network layer (layer 3) protocol?
Which of the following is an example of a network layer (layer 3) protocol?
- FTP
- HTTP
- IP (correct)
- TCP
What's the difference between a client and a server?
What's the difference between a client and a server?
A client requests data, and a server responds to that request.
Which of the following are examples of layers of our five-layer network model? (Select all that apply)
Which of the following are examples of layers of our five-layer network model? (Select all that apply)
- Network layer
- Physical layer (correct)
- Application layer (correct)
- Transport layer (correct)
Which of the following statements accurately describe the differences between a hub and a switch? (Select all that apply)
Which of the following statements accurately describe the differences between a hub and a switch? (Select all that apply)
What does LAN stand for?
What does LAN stand for?
What's a router?
What's a router?
What is the type of modulation used by twisted pair cable computer networks known as?
What is the type of modulation used by twisted pair cable computer networks known as?
What's the difference between full and half duplex?
What's the difference between full and half duplex?
How many octets are there in a MAC address?
How many octets are there in a MAC address?
What address is used for Ethernet broadcasts?
What address is used for Ethernet broadcasts?
What is a cyclical redundancy check?
What is a cyclical redundancy check?
When data can flow across a cable in both directions, this is known as _____ communication.
When data can flow across a cable in both directions, this is known as _____ communication.
MAC address stands for ____ address.
MAC address stands for ____ address.
Something that requests data from a server is known as a ____.
Something that requests data from a server is known as a ____.
The first part of an Ethernet frame is known as the _____.
The first part of an Ethernet frame is known as the _____.
UDP stands for ______.
UDP stands for ______.
What layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for defining a way to interpret signals so network devices can communicate?
What layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for defining a way to interpret signals so network devices can communicate?
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes?
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes?
A system has defined specifications that describe how signals are sent over connections. Which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model provides this function?
A system has defined specifications that describe how signals are sent over connections. Which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model provides this function?
You have installed a device at the physical layer. All of the systems you connect to this device will talk to each other at the same time. What have you installed?
You have installed a device at the physical layer. All of the systems you connect to this device will talk to each other at the same time. What have you installed?
You open a web page and log into your email. The traffic travels over many routers. What protocol will the routers use to determine the most optimal path to forward the traffic?
You open a web page and log into your email. The traffic travels over many routers. What protocol will the routers use to determine the most optimal path to forward the traffic?
You get in your car after work and turn on the radio. What type of communication does the radio use?
You get in your car after work and turn on the radio. What type of communication does the radio use?
Select the device that will have the most network ports.
Select the device that will have the most network ports.
Which layer abstracts away the need for any other layers to care about what hardware is in use?
Which layer abstracts away the need for any other layers to care about what hardware is in use?
What does the letter B represent in a Media Access Control (MAC) address?
What does the letter B represent in a Media Access Control (MAC) address?
What immediately follows the Start Frame Delimiter in an Ethernet frame?
What immediately follows the Start Frame Delimiter in an Ethernet frame?
Which section in an Ethernet frame contains the data from higher layers, such as Internet Protocol (IP) and the transport and application layers?
Which section in an Ethernet frame contains the data from higher layers, such as Internet Protocol (IP) and the transport and application layers?
Study Notes
Network Layer Protocols
- IP (Internet Protocol) is the most common protocol at the network layer (layer 3).
Client-Server Model
- A client requests data, while a server responds to these requests.
Five-Layer Network Model
- Key layers include the Application layer, Transport layer, and Physical layer.
Hubs vs. Switches
- A switch remembers the devices connected to each interface; a hub does not.
- Hubs are categorized as physical layer devices, while switches function at the data link layer.
- Hubs create larger collision domains compared to switches.
Local Area Network (LAN)
- LAN stands for Local Area Network, defining a network limited to a small geographic area.
Routers
- A router forwards data between independent networks.
Twisted Pair Cable
- Modulation in twisted pair cable is referred to as line coding, indicating binary states of signals.
Duplex Communication
- Full duplex allows simultaneous two-way communication; half duplex permits communication in both directions, but only one side communicates at a time.
MAC Address
- A MAC address is composed of 6 octets, forming a 48-bit number.
- The MAC address FF:FF:FF:FF:FF:FF is used for Ethernet broadcasts.
Data Integrity
- A cyclical redundancy check (CRC) is a mathematical method to verify data integrity, ensuring complete, unharmed data transmission.
Types of Communication
- Duplex communication allows data to flow in both directions.
- Simplex communication is unidirectional, as seen with radios providing one-way communication.
Ethernet Frames
- The preamble indicates an incoming Ethernet frame and aids in clock synchronization.
- The payload section contains actual data transmitted from higher protocol layers.
UDP
- UDP stands for User Datagram Protocol, a common transport layer protocol.
Network Layer Functions
- The data link layer interprets signals for network devices.
- It abstracts physical layer details, allowing higher layers to not worry about hardware specifics.
Devices and Ports
- A switch has the most network ports, enabling multiple device connections simultaneously.
- A hub connects numerous computers at the same time but lacks intelligent traffic management.
Path Optimization
- Border Gateway Protocol (BGP) is used by routers to identify optimal pathways for data traffic.
Octet Representation
- The letter B in a MAC address symbolizes the number 11 in hexadecimal notation.
Ethernet Frame Structure
- The destination MAC address follows the Start Frame Delimiter in an Ethernet frame.
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Description
Test your understanding of basic networking concepts in this Week 1 quiz. Topics include network layer protocols and the roles of clients and servers. Challenge yourself with flashcards designed to reinforce your learning.
