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?
- UDP
- TCP
- Ethernet
- IP (correct)
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? (Check all that apply)
Which of the following are examples of layers of our five-layer network model? (Check all that apply)
- The transport layer (correct)
- The application layer (correct)
- The presentation layer
- The physical layer (correct)
Which of the following statements accurately describe the differences between a hub and a switch? (Check all that apply)
Which of the following statements accurately describe the differences between a hub and a switch? (Check 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?
A device that knows how to forward traffic between independent networks is known as a ____.
A device that knows how to forward traffic between independent networks is known as a ____.
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 ____.
When an electrical pulse on one wire is accidentally detected on another nearby wire, this is known as _____.
When an electrical pulse on one wire is accidentally detected on another nearby wire, this is known as _____.
A defined set of standards that computers must follow in order to communicate properly is known as a _____. (Select one)
A defined set of standards that computers must follow in order to communicate properly is known as a _____. (Select one)
What is the fifth layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
What is the fifth layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes? (Select one)
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes? (Select one)
The Ethernet protocol functions at which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
The Ethernet protocol functions at which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
What type of network segment is being used when multiple systems try to send data at the same time and electrical pulses sent across the cable interfere with each other?
What type of network segment is being used when multiple systems try to send data at the same time and electrical pulses sent across the cable interfere with each other?
What device forwards data and operates at layer three of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
What device forwards data and operates at layer three of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
How many wires are in a standard Category 6 cable?
How many wires are in a standard Category 6 cable?
Select the device that will have the most network ports: Desktop, Server, Switch, Laptop?
Select the device that will have the most network ports: Desktop, Server, Switch, Laptop?
What is used to determine when the communications channels are clear and when a device is free to transmit data?
What is used to determine when the communications channels are clear and when a device is free to transmit data?
You need to identify the manufacturer of a network interface. Where will you look for this information?
You need to identify the manufacturer of a network interface. Where will you look for this information?
What section in an Ethernet frame will you find a Virtual Local Area Network (VLAN) header?
What section in an Ethernet frame will you find a Virtual Local Area Network (VLAN) header?
Where is the Start Frame Delimiter (SFD) found in an Ethernet frame?
Where is the Start Frame Delimiter (SFD) found in an Ethernet frame?
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Study Notes
Networking Protocols and Layers
- IP (Internet Protocol) is the primary network layer (Layer 3) protocol.
- Client initiates requests for data, while server provides responses to these requests.
- Five-layer network model includes the physical layer, transport layer, and application layer, among others.
Hubs vs. Switches
- Hubs create larger collision domains due to their lack of intelligent data handling.
- Hubs operate at the physical layer; switches function at the data link layer, storing device connections.
Networking Definitions
- LAN stands for Local Area Network.
- Routers forward data between distinct networks.
- Line coding refers to the modulation technique used in twisted pair cable networks.
Communication Modes
- Full duplex allows simultaneous two-way communication; half duplex permits one-way communication at a time.
Addressing and Identification
- MAC addresses consist of 6 octets (48-bit numbers).
- Ethernet broadcasts utilize the address FF:FF:FF:FF:FF:FF.
- A cyclical redundancy check verifies data integrity by ensuring the absence of corruption.
- MAC stands for media access control; it identifies network interface manufacturers via the first three octets known as the Organizationally Unique Identifier (OUI).
Network Characteristics
- Crosstalk occurs when an electrical pulse migrates from one wire to a nearby wire, mitigated by twisting wires in cables.
- Protocols define standards for communication among computers.
- The application layer is the fifth layer of the TCP/IP model.
Data Transmission
- Both collision domains and CSMA/CD (Carrier Sense Multiple Access with Collision Detection) are essential for managing communication channels and avoiding data collisions.
- A collision domain restricts simultaneous communication to one device.
Ethernet Frame Structure
- The EtherType field in an Ethernet frame may contain a VLAN (Virtual Local Area Network) header.
- The Start Frame Delimiter (SFD) is located in the last byte of the preamble of an Ethernet frame, indicating the start of frame data.
Cable Specifications
- Standard Category 6 (Cat6) cables incorporate 8 wires arranged into four twisted pairs.
- Switches, designed to connect multiple devices, possess the highest number of network ports compared to desktops, servers, and laptops.
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