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1 Network+ > Hardware, cables, topologies, transmission types > Flashcards

Hardware, cables, topologies, transmission types Flashcards

1
Q

What speed is 10GBASE-T and what are the wires made of?

A

10Gbit/s speed over twisted copper pairs.

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1
Q

What is the speed of 1000BASE-SX and what media does it use?

A

1Gbit/s FIBER connection. SX stands for Short Wavelength.

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2
Q

What type of light source does multi-mode fiber use?

A

LED is generally used for multi-mode fiber as its short range (up to 2km) and inexpensive.

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3
Q

Does single or multi mode fiber signal reach further?

A

Single-mode fiber technology travels a lot further (up to 100km) than multi-mode. Thanks in part to using a LAZER.

Single lazer beam.

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4
Q

What speed does twin axial (twinax) cable support and over what maximum distance?

A

Twin-axial Cable is low cost cable with lower latency than twisted copper pair cable with a maximum cable length of 5m.

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5
Q

What is a transceiver?

A

A transmitter and receiver of signals in a single component. E.g. an ethernet transceiver that you can plug into a switch port.

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6
Q

What does SFP stand for in an SFP Transceiver?

A

Small Form-factor Pluggable Transceiver - e.g. 1Gbit/s fiber or copper/RJ45.

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7
Q

What max. speed does an SFP+ transceiver support vs SFP?

A

SFP+ 16Gbit/s. SFP 1Gbit/s. Both transceivers are the same physical size/form factor.

SFP+ = Small Form-factor Pluggable Enhanced+

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8
Q

Does a Quad SFP (QFSP) have a bigger form factor than single SFP?

A

Yes, but only slightly, not 4x the size so it saves space.

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9
Q

What is the max. speed supported by a QFSP transceiver?

A

4x a single SFP so 4Gbit/s (SFP = 1Gbit/s).

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10
Q

Which has a bigger form-factor of LC (Local Connector) or SC (Subscriber Connector) fiber connectors?

A

LC (Little) is slightly smaller than SC (SCaled up) connector but both come in pairs and lock in with a clip.

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11
Q

What connector type does ST fiber connector use?

A

Straight Tip Fiber connector is a bayonet connector - which means you stick it in and twist it to lock in place.

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12
Q

How many individual fibres are contained within a single MPO fiber connector?

A

MPO - Multi-fiber Push On connector contains 12 fibers in one cable to save space. It clips into place.

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13
Q

What type of connection uses RJ11 connector?

A

Phoneline/DSL (Digital Subscriber Line) connection uses the RJ11 connector 6P2C (6 position, 2 conductor).

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14
Q

What type of connection has 8 positions and 8 conductors?

A

RJ45 has 8P8C - Ethernet.

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15
Q

What type of connector would you use with DOCSIS (Data Over Cable Service Interface Specification)?

A

F-connector, RJ6 cable, cable modem - TV and internet, screw in.
Or
BNC Connector, bayonet connector.

16
Q

What is the most commonly used network topology type in big businesses?

A

Star/Hub and Spoke topology is the most frequently used. With an ethernet switch in the middle.

17
Q

What topology is based on multiple data paths between devices on the LAN to provide redundancy (and can load balance)?

A

Mesh topology - relies on multiple paths between network devices for redundancy and load balancing.

18
Q

What is a network topology called that consists of multiple different types of topology?

A

Hybrid Network Topology.

19
Q

In a spine and leaf topology what does and does not connect to what?

A

Spine switches connect to every leaf switch which then connect to end points/devices like PC’s. But spine switches do NOT connect directly to each other.

Broken spine.

20
Q

What are the 3 tiers of the 3-tier architecture?

A

Tier 1: Core (Servers, databases, critical stuff)
Tier 2: Distribution (switches)
Tier 3: Access (end users, printers, switches close to users, etc)

21
Q

In the collapsed core/two-tier network architecture model what layers of the 3-tier model get compressed into one tier?

A

Core and Distribution tiers are one tier in the collapsed core model.

This is a good model for smaller organizations, sacrifices some resiliency/redundancy for simpler implementation and lower cost to setup and maintain than the 3-Tier model.

22
Q

What is data ingress?

A

Ingress = data entering a system/network.

23
Q

What is data egress?

A

Data Exiting a network/system.

24
Q

Does an East to West data flow leave a data center?

A

No, East-West data flow moves across devices WITHIN a data center, therefore security is a much lesser concern than North-South flow which ingresses and egresses the data center.

25
Q

What is the name of a one-to-one data transfer directly between two systems only?

A

Unicast: one-to-one transmission from one point in the network to another point. E.g. web surfing, file transfers. Uses IPv4 or IPv6.

26
Q

What is a one to many delivery of data network communication called?

A

Multicast - where one source sends out data simultaneously to multiple other systems such as streaming to multiple users.

Requires good hardware.

27
Q

What is anycast?

A

Anycast is a communication from one to one OF many choices. It is sent (like a unicast) to the closest/optimal device of a bunch of devices on its network.

28
Q

What communication method sends data packet from one system to all other systems on the domain at once?

A

Broadcast - sends data from one device to all connected/subnet devices (broadcast domain) at once.

Like a hub. Used for routing updates, ARP requests.

Only works with IPv4.

29
Q

What is a Distribution Frame?

A

Distribution Frame = a structure where cables are connected terminated passively (as it doesn’t actively process or amplify signals) , e.g. a punch down block or patch panel. Usually mounted on a wall or flat surface.

30
Q

What is a MDF/Main Distribution Frame?

A

MDF = central hub for a buildings IT systems/cabling aka an IT closet.

31
Q

What is a PDU?

A

Power Distribution Unit (PDU) = provide multiple power outlets and are generally manageable and monitorable remotely.

1 Network+ (10 decks)

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