ScienceComputer ScienceComputer NetworksThe Bits And Bytes Of Computer Networking. Week 1: Networking Basics
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The Bits And Bytes Of Computer Networking. Week 1: Networking Basics

Guinevere Sanchez avatar Guinevere Sanchez
25 July 2022
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question
Which of the following is an example of a network layer (layer 3) protocol? IP, TCP, UDP, Ethernet
answer
IP, or Internet Protocol, is the most common network layer protocol.
question
What's the difference between a client and a server?
answer
A client requests data, and a server responds to that request.
question
Which of the following are examples of layers of our five-layer network model? Check all that apply. The physical layer The transport layer, The presentation layer The application layer
answer
The physical layer The transport layer, The application layer
question
Which of the following statements accurately describe the differences between a hub and a switch? Check all that apply.
answer
A hub causes larger collision domains/ a hub is a physical layer device, and a switch is a data link layer device/ a switch remembers which devices are connected on each interface, while a hub does not.
question
What does LAN stand for?
answer
Local area network
question
What's a router?
answer
a device that knows how to forward data between independent networks.
question
What is the type of modulation used by twisted pair cable computer networks known as?
answer
Line coding
question
What's the difference between full and half duplex?
answer
Full duplex allows communications in two directions at the same time; half duplex means that only one side can communicate at a time.
question
How many octets are there in a MAC address?
answer
6; A MAC address is a 48-bit number consisting of 6 octets.
question
What address is used for Ethernet broadcasts?
answer
FF::FF:FF::FF::FF:FF
question
What is a cyclical redundancy check?
answer
A mathematical calculation used to ensure that all data arrived intact.; A cyclical redundancy check ensures that there was no data corruption.
question
A device that knows how to forward traffic between independent networks is known as a _____.
answer
router
question
MAC address stands for ____ address.
answer
media access control
question
Something that requests data from a server is known as a ____.
answer
client; A client requests data, and a server responds to that request.
question
When an electrical pulse on one wire is accidentally detected on another nearby wire, this is known as _____.
answer
cross talk; Crosstalk is reduced by the way that wires are twisted inside of a cable.
question
A defined set of standards that computers must follow in order to communicate properly is known as a _____. switch/ collision domain/ modulation/ protocol
answer
not a collision domain.
question
What is the fifth layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
answer
Application
question
Which layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model is responsible for delivering data between two nodes? Datalink, Network, Transport, Application
answer
Not Transport
question
The Ethernet protocol functions at which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
answer
Data link; A lot of protocols exist at the data link layer, but the most common is Ethernet.
question
Multiple systems try to send data at the same time. The electrical pulses sent across the cable interfere with each other. What type of network segment is being used?
answer
Collision Domain; A collision domain is a network segment where only one device can communicate at a time.
question
What device forwards data and operates at layer three of the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
answer
Router; A router is a device that knows how to forward data between independent networks and operates at layer three.
question
How many wires are in a standard Category 6 cable?
answer
8; A standard Cat6 cable has 8 wires that consist of four twisted pairs inside of a single jacket.
question
Select the device that will have the most network ports. Desktop, Server, Switch, Laptop
answer
Switch; A switch will have the most network ports, because its purpose is to connect many devices.
question
What is used to determine when the communications channels are clear and when a device is free to transmit data?
answer
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is used to determine when the communications channels are clear and when a device is free to transmit data.
question
You need to identify the manufacturer of a network interface. Where will you look for this information?
answer
The first three octets of a MAC address are known as the Organizationally Unique Identifier (OUI). These are assigned to individual hardware manufacturers.
question
What section in an ethernet frame will you find a Virtual Local Area Network (VLAN) header?
answer
EtherType field, You may find a VLAN header in the EtherType field. This will indicate that the frame is called a VLAN frame.
question
Where is the Start Frame Delimiter (SFD) found in an ethernet frame?
answer
The last byte of the preamble, The SFD is found in the last byte of the preamble, and signals to a receiving device that the preamble is over, and that the actual frame contents will now follow.