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CompTIA Network+, Management, Monitoring and Optimization > Network Optimization > Flashcards

Network Optimization Flashcards

1
Q

What are the 4 real-time services in which rely on an optimized network?

A

1) VoIP
2) Video applications/Video Conferencing
3) Presence
4) Multi-casting

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2
Q

What method of quality of service can support up to 64 different classifications, functions at layer 3, and uses the below 3 classes of traffic:

1) expedited forwarding
2) assured forwarding
3) Class Selector

A

DSCP (Differentiated Services Code Point or DiffServ)

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3
Q

The Class of Service method of QoS is defined in what IEEE standard and is expressed through which field and in which IEEE header?

A

Defined in IEEE 802.1p

Expressed through the 3-bit Priority Code Point in the VLAN header IEEE 802.1Q

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4
Q

Class of Service provides how many levels of service?

A

7

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5
Q

What are the 3 main components of a Unified Communications system?

A

UC Servers
UC Devices
UC Gateway

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6
Q

What’s the difference between bandwidth throttling and rate limiting?

A

bandwidth throttling deals with the amount of data and the time-period in which it is send
limiting deals with the rate at which it is sent

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7
Q

Where do traffic shaping devices store delayed traffic before releasing it?

A

in the FIFO buffer

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8
Q

Which type of back up combination will incur the longest restoration: Full/Differential or Full/Incremental

A

Full/Incremental. Because there will be several incremental backup tapes as opposed to just using one differential.

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9
Q

What computer network architecture decouples network control and forwarding functions, enabling network control to become directly programmable and the underlying infrastructure to be abstracted from applications and network services.

A

Software Defined Networking

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10
Q

Cisco’s OpenStack cloud operating system is an example of what type of service?

A

Network as a Service (NaaS)

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11
Q

Which storage type uses a switched fabric topology protocol and its adapters can exchange information on QoS? Why is QoS important from a SAN perspective?

A

Infiniband

QoS is important because storage protocols are time-sensitive

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12
Q

What are the 5 common data rates used in Fibre Channel?

A

2, 4, 8 and 16Gbps

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13
Q

what 3 protocols can be used to connect to a NAS?

A

NFS, CIFS and HTTP

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14
Q

What are the 4 typical service levels made available through cloud deployment?

A

IaaS
PaaS
SaaS
NaaS

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15
Q

What are the 3 connectivity methods to connect to a virtual server over a VPN or WAN in a cloud environment?

A

Remote Desktop (RDP for Win, SSH for Lnx)
FTP
VMware remote console

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16
Q

What is the purpose of the MDF?

A

To connect internal communications equipment to external subscriber carrier equipment.

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17
Q

What are the two main aims of cable management?

A

1) protect the integrity of cables

2) prevent overheating of the infrastructure caused by unruly cables blocking airflow

18
Q

What’s the difference between a power converter and power inverter?

A

power converter converts AC to DC

Power inverter converts DC to AC

19
Q

A/B power means what?

A

Running two separate power circuits into a facility

20
Q

Considerations for device placement include what 3 things?

A

Airflow
Cable Trays
Rack systems

21
Q

port labelling involves labelling what?

A

switch ports, patch panels to wall outlets

22
Q

When labelling systems in a rack, what two pieces of information should be included for devices that are connected to a network?

A

IP addresses and DNS

23
Q

What standard provides specifications for clear labelling and admin best practices across all electrical and network systems?

A

TIA/ANSI 606-B.1 (example is dividing the floorspace into quadrants)

24
Q

What are the 3 key reasons why you need to carefully manage bandwidth?

A

1) Latency sensitivity
2) high-bandwidth applications
3) Uptime

25
Q

What are the 5 problems that affect data as it travels that QoS manages?

“Dolly Dropped an Error in Jitesh’s Outhouse”

A

1) Delay
2) Dropped Packets
3) Error Packets
4) Jitter (variation in packet delay)
5) Out of Order Delivery

26
Q

UC gateway does what?

A

ties together separate locations that need to use UC and connects the IP network to the PSTN network.

27
Q

Name the lowest 2 QoS levels

A

1) 0 - best effort

2) 1 - Background

28
Q

Name the QoS level suited for critical business applications

A

3 - Excellent Load

29
Q

Name the QoS level for ‘streaming media’ and ‘voice and video’?

A

4 (Controlled load) and 5 (Voice and video) respectively

30
Q

a traffic contract is used in what type of network optimization and defines what?

A

Traffic Shaping

It determines which packets are allowed on the network and when

31
Q

List the 7 components of virtualization

A

1) Hypervisor
2) Virtual servers
3) Virtual NICs
4) Virtual Switches
5) Virtual Routers
6) Virtual firewealls
7) Virtual PBX

32
Q

Which network storage method allows devices to use the existing network medium for storage as well as communication?

A

iSCSI

33
Q

What speeds does fibre-channel work up to?

A

16Gbps

34
Q

When might you want to enable jumbo frames?

A

When using high speed networks like SANs. Because larger payloads reduce overhead cycles.

35
Q

Fibre channel over ethernet can be routed, true or false?

A

False, it doesn’t use IP so can’t be routed.

36
Q

Infiniband can support upto what bandwidth?

A

56Gpbs

37
Q

iSCSI can support up to what speeds?

A

40Gpbs

38
Q

What’s the key difference between file-based storage (NAS) and block-based storage (SAN)?

A

file-based storage is like a file server that allows sharing of files and folders
block-based storage is akin to having an entire remotely located hard disk onto which you can do anything like pick the file format, and install an operating system on.

39
Q

What is a LUN

A

Logical Unit Identifier. It’s the unique identifier used by a host when it wants to access storage.

40
Q

What is a HBA and an iSCSI initiator

A 
A HBA (host bus adaptor) is a hardware card that handles the read/write commands to and from the LUN when a host or Hypervisor using Fibre Channel accesses storage on a SAN.
iSCSI initiator is software running on the host that does the same job (for iSCSI obviously) connects to the iSCSI target on the LUN using the ethernet adaptor
41
Q

List the main components used in a Fibre Channel network

A

1) Host Bus Adaptors
2) Fibre Channel Switches
3) Fibre Channel storage Units
4) Storage Unit Processors

42
Q

How many connections to storage switches does the HBA usually have? Why?

A

2, for redundancy

CompTIA Network+, Management, Monitoring and Optimization (5 decks)

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