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Networking > CompTIA Network Module 2 > Flashcards

CompTIA Network Module 2 Flashcards

1
Q

What is Network media ?

A

refers to the various channels/ pathways through which data is transmitted between devices in a network.

Physical/Bounded (cable-based) or wireless

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2
Q

What are bounded network media

A

Refers to physical cables that provide a conduit for data transmission.

The signals are confined within the medium, ensuring they travel along a specific path.

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3
Q

What are the two main types of copper media ?

A

-Twisted pair cables
Shielded (STP) - sig reduce EMI
Unshielded (UTP) - reduced EMI

-Coaxial Cable

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4
Q

List the T568-A colour arrangements.

A
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5
Q

List the T568-B colour arrangements.

A
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6
Q

What is bandwidth ?

A

-Range of frequencies a signal occupies in a channel.

  • Digital Signals = associated with data transmission rate (bps)
  • Analogue Signals = related to frequency range (Hz)
  • Eg, FM station operating at 100 MHz might use a bandwidth of 200 kHz. Means it’s signals occupies freq from 99.9 MHz to 100.1 MHz.
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7
Q

What is transfer speed/internet speed ?

A
  • is the actual rate at which data is transmitted over a network connection.
  • affected by factors like network congestion, hardware limitations, signal interference.
  • unit - bits per sec (eg Mbps)
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8
Q

Name the following COAX connector types.

A
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9
Q

Name the fibre optic cabling parts

A
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10
Q

Name 3 fiber modes of transfer.

A
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11
Q

What are the names of these fiber connectors ?

A
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12
Q

List 4 media converters.

A
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13
Q

What is demarcation point or DMARC ?

A
  • physical location where the service provider’s network ends and the customer’s private network begins.
  • defines the boundary of responsibility for maintenance and repairs between the service provider and the customer.
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14
Q

What is backbone wiring ?

A
  • connects sections of the network, such as the entrance facility, telecommunications rooms, and equipment rooms.

-

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15
Q

What is equipment room ?

A
  • a dedicated space where most of the building’s major networking equipment is located.
  • houses servers, switches, routers, and other critical hardware
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16
Q

What is Main Cross Connect ?

A
  • the physical cabling that provides a direct connection between two different termination locations, such as patch panels, within a data center.
  • point of termination for backbone wiring
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17
Q

What is Plenum ?

A

plenum is a space in buildings used for air circulation for heating and cooling systems, typically found above drop ceilings or below raised floors.

18
Q

What is plenum cabling ?

A
  • Plenum cabling refers to cables that are specifically designed to be installed in these plenum spaces.
  • 🔥 resistant
19
Q

How do the following cabling relate in premise wiring ?

A
  • Drop Cable:
    •Connects main network to individual workstations devices.
    •from wall outlet to a device
  • Patch Panel:
    •central point all network cables converge.
    •easy management and reconfiguration.
  • Patch Cable:
    •Short cables = connect devices to the patch panel
    •used within the wiring closet = connect diff network components.
  • Intermediate Distribution Frame (IDF):
    •secondary wiring closet = connects to MDF.
    •Distributes network connections to specific areas or floors within a building.
  • Main Distribution Frame (MDF):
    •primary hub for network connections in a building.
    •Connects to external network services and distributes connections to IDFs.
  • Wiring Closet:
    •space for housing network equipment like patch panels, switches, and routers.
    •Ensures organized and secure management of network infrastructure.
20
Q

What is MDI, MDI-X and Auto-MDIX ?

A
  • Medium Dependent Interface
  • Hardware interface = establish physical and electrical connection with UTP cable
  • Port on back of linking devices like switches, computers etc
  • Transmit data on pins 1 & 2, receives data on pins 3 & 6 of RJ45 connector
  • MDI-X = Reverses transmission and receiving pins to handle crossover. (no crossover cable required)
  • Auto MDIX = Automatically detects connection type. ( no MDI and MDI-X) ports needed)
21
Q

What are transceivers in networking ?

A
  • Called Transmitter/Receiver
  • a device that combines both transmitter and receiver functions into a single unit.
  • usually built on NIC
22
Q

List 4 types of transceivers.

A
  • GBIC = Gigabit Interface Converter
  • SPF = Small Form-Factor Pluggable
  • SPF +
  • QSPF = Quad Small Form-Factor Pluggable
23
Q

What is unbounded network media ?

A
  • Media that is not bound by physical characteristics such as copper or fiber.
24
Q

List 2 types of radio networks.

A
  • Broadcast Networks: These are one-to-many networks used for public information and entertainment, like FM radio stations1.
  • Two-Way Radio Networks: These allow for duplex communication, meaning devices can send and receive signals simultaneously. They are commonly used by public safety services like police and fire departments.
25
Q

What is spread spectrum in radio networking ?

A
  • a technique to transmit signals over a wide range of frequencies
26
Q

List 2 types of spread spectrum.

A
  • Frequency Hopping Spread Spectrum (FHSS):
    The signal rapidly switches (hops) between different frequencies within a larger band. This makes it harder for interference to disrupt the communication.
  • Direct Sequence Spread Spectrum (DSSS):
    The signal is spread by multiplying it with a pseudo-random noise code. This spreads the signal over a wider frequency band, making it more resistant to interference
27
Q

How do Infrared transmission work ?

A
  • Data sent via pulses of light
  • Needs line of sight
28
Q

What frequency is used in bluetooth transmission ?

A
  • 2.4 Ghz frequency
  • Same as wifi
29
Q

What is wireless Access Point. (WAP) ?

A
  • Allows wireless devices to connect to the network
  • Connects a wireless network to a wired network.
30
Q

What is Service Set Identifier (SSID)?

A
  • The name of a wireless network
  • Visible to devices when scanning for available networks
  • Up to 32 Characters.
  • The WAP or Wireless routers broadcast the SSID, making it visible to nearby devices
31
Q

What happens when you disable SSID ?

A
  • Devices will have to manually enter the name of the network to connect to it.
  • It wont be broadcasted.
32
Q

What is Network Interface Card (NIC) ?

A
  • Hardware component that connects computer to a network.
  • LED light to show a quick status of the network.
33
Q

What is a switch ?

A
  • a device that connects multiple devices within a network, allowing them to communicate with each other.
  • Common connecting point for nodes on a network.
34
Q

How do switches forward data ?

A
  • Looks at the MAC address of each packet of data for forwarding
35
Q

What is managed switch ?

A
  • allows for advanced configuration, monitoring, and management of network traffic

They offer:

  • Configuration options : Web-based or command-line interface for configuring settings.
  • VLAN support : Create and manage Virtual Local Area Networks (VLANs) for traffic segmentation.
  • Quality of Service (QoS) : Prioritize traffic based on application, protocol, or user.
  • Security features : Access control lists (ACLs), port security, and authentication.
  • Monitoring
36
Q

What is Port mirroring ?

A
  • Is a feature on network switches that allows copying traffic from one or more ports to another port, usually for monitoring or analysis purposes.
  • Also called SPAN (Switched Port Analyzer)
37
Q

What is link aggregation ?

A
  • is a technique used to combine multiple network connections in parallel to increase:
  • Bandwidth: Aggregate multiple links to achieve higher data transfer rates.
  • Redundancy: Provide failover capabilities in case one or more links fail.
  • Reliability: Improve overall network reliability and uptime.
38
Q

What is Router ?

A
  • A router is a networking device that connects multiple computer networks together via either wired or wireless connections.
  • Looks at the IP address to forward data
  • Can only be used with routable protocols
  • Can be hardware or software
39
Q

what are the diff btw routers, switches and gateways ?

A
  • Routers connect and route between networks. (Uses IP address)
  • Switches connect and forward data within a network. (Uses MAC address)
  • Gateways connect to external networks and translate protocols.
40
Q

What is a gateway ?

A
  • Is a device that enables communication btw diff networks, often translating protocols and acting as a routing device.
  • NB, not default gateway
41
Q

List 1 Noise control method in networking.

A
  • Grounding
  • Special isolated grounding point for sensitive devices (usually orange)
42
Q

What is differential signaling and how does it cancel noise ?

A
  • Differential signaling method transmit data over network cable by sending complementary signals over two wires.
  • Noise cancelled through “common-mode rejection”.

Signal 1 (original): V1 = Data + Noise

Signal 2 (inverted): V2 = -Data + Noise

Difference (receiver calculates): V1 - V2 = Data - (-Data) = 2Data

Noise term cancel out cause noise is the same in both cables.

Networking (7 decks)

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