Questions and Answers
Which of the following is an example of a network layer (layer 3) protocol?
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 statements accurately describe the differences between a hub and a switch? (Select all that apply)
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What does LAN stand for?
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What's a router?
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What is the type of modulation used by twisted pair cable computer networks known as?
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What's the difference between full and half duplex?
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How many octets are there in a MAC address?
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What address is used for Ethernet broadcasts?
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What is a cyclical redundancy check?
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When data can flow across a cable in both directions, this is known as _____ communication.
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MAC address stands for ____ address.
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Something that requests data from a server is known as a ____.
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The first part of an Ethernet frame is known as the _____.
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UDP stands for ______.
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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?
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Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes?
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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?
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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?
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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?
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You get in your car after work and turn on the radio. What type of communication does the radio use?
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Select the device that will have the most network ports.
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Which layer abstracts away the need for any other layers to care about what hardware is in use?
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What does the letter B represent in a Media Access Control (MAC) address?
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What immediately follows the Start Frame Delimiter in an Ethernet frame?
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Which section in an Ethernet frame contains the data from higher layers, such as Internet Protocol (IP) and the transport and application layers?
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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.
