Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

CompTIA Network+ (N10-008) TMM > Network Availability > Flashcards

Network Availability Flashcards

1
Q

Availability

A

Concerned with being up & operational

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Reliability

A

Concerned with not dropping packets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

MTTR

A

Mean Time to Repair

Measures the average time it takes to repair a network device when it breaks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

MTBF

A

Mean Time Between Failures

Measures the average time between failures of a device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Redundant Networks w/Single Point of Failure

A

Link Redundancy:
Internal Hardware Redundancy
(PSUs & NICs)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Redundant Networks w/No Single Points of Failure

A

Link Redundancy:
Redundancy of Components
(Switches & Routers)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Hardware Redundancy

A

(Takes many forms)
Devices with two NICs, HDDs/SSDs, or internal PSUs

Often found in strategic network devices
(Routers/Switches/Firewalls/Servers)
Usually not found in clients due to cost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Hardware Redundancy: Active-Active

A

Multiple NICs are active at the same time
NICs have their own MAC addresses
Makes troubleshooting more complex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Hardware Redundancy: Active-Standby

A

One NIC is active at a time

Client appears to have a single MAC address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Layer 3 Redundancy

A

Clients are configured with a default gateway (router)

If default gateway goes down, they cannot leave subnet

Layer 3 redundancy creates virtual gateways to avoid this issue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

HSRP

A

Hot Standby Router Protocol:
Proprietary first-hop redundancy by Cisco
Allows for active router and standby router
Creates virtual router as the default gateway

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

CARP

A

Common Address Redundancy Protocol:
Open-standard variant of HSRP
Allows for active & standby router
Creates virtual router as default gateway

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

VRRP

A

Virtual Router Redundancy Protocol:
IETP open-standard variant of HSRP
Allows for active & standby router
Creates virtual router as default gateway

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

GLBP

A

Gateway Load Balancing Protocol:
Proprietary first-hop redundancy by Cisco
Focuses on load balancing over redundancy
Allows for active & standby router
Creates virtual router as default gateway

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

LACP

A

Ling Aggregation Control Protocol:
Achieves redundancy by having multiple links between devices
Load balancing occurs over multiple links
Multiple links appear as a single logical link

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Availability Best Practices

A

Examine technical goals
Identify budget to fund high avail features

Categorize business apps into profiles
(Each requires certain level of availability)

Establish performance standards
Define how to manage & measure the solution
(Need metrics to quantify success)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Recovery Sites: Cold Sites

A

Building is available, but no hardware/software configured

Need to buy resources (or ship them in) and the configure network

Slow & time consuming recovery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Recovery Sites: Warm Sites

A

Building & equipment available

Software may not be installed & latest data unavailable

Recovery is fairly quick, but not everything from original site is available to employees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Recovery Sites: Hot Sites

A

Building, equipment, & data available
Software & hardware configured
Ready as soon as people walk in
Downtime is very minimal

20
Q

Backup Types

A

Full: Complete backup (time consuming & costly)

Incremental: Backup only data changed since last backup

Differential: Backup only data since last full backup

Snapshots: Read-only copy of data frozen in time (VMs)

21
Q

QoS

A

Quality of Service:
Enables strategic optimization of network performance for different types of traffic

Identifies types of traffic needing priority
Determines how much bandwidth required
Efficiently uses WAN link’s bandwidth
Identifies types of traffic to drop during network congestion

22
Q

QoS Categories

A

Delay:
Time a packet travels from source to destination
Measured in ms

Jitter:
Uneven arrival of packets (harmful in VoIP/streaming)

Drops:
Occurs during link congestion
Router’s interface queue overflows & causes packet loss

23
Q

QoS Traffic Categorization

A

Determine network performance requirements for various traffic types (voice, video, data, etc)

Low delay: Voice, video streaming

Low priority: Web browsing, non-mission critical data

24
Q

QoS Traffic Categorization: Best Effort

A

Does not truly provide QoS to that traffic

No reordering of packets

Uses FIFO (first in, first out) queuing

25
QoS Traffic Categorization: IntServ
``` Integrated Services (IntServ/Hard QoS): Makes strict bandwidth reservations ``` Reserves bandwidth by signaling devices
26
QoS Traffic Categorization: DiffServ
Differentiated Services (DiffServ/Soft QoS): Differentiates between multiple traffic flows Packets are "marked" Routers/switches make decisions based on markings
27
QoS Traffic Categorization Methods
``` Classification Marking Congestion management Congestion avoidance Policing & shaping Link efficiency ```
28
Marking of Traffic
Altered bits within a frame/cell/packet indicates handling of traffic Network tools make decisions based on markings
29
Congestion Management
Queuing: When a device receives traffic faster than it can be transmitted, it buffers the extra traffic until bandwidth is available Queuing algorithm empties the packets in specified sequence & amount Queuing Algorithm types: Weighted fair queuing Low-latency queuing Weighted round-robin
30
Congestion Avoidance
Newly arriving packets would be discarded if the device's output queue fills to capacity If TCP: Will be retransmitted If UDP: Will be dropped
31
Congestion Avoidance: RED
Random Early Detection: As the queue fills, the possibility of a discard increases until it reaches 100% At 100%, all of that traffic type is dropped RED instead drops packets from selected queues based on defined limits
32
Policing
Typically discards packets that exceed a configured rate limit (speed limit) Recommended for higher-speed interfaces
33
Shaping
Buffers (delays) traffic exceeding configured rate Recommended for slower-speed interfaces
34
Link Efficiency: Compression
Packet payload is compressed to conserve bandwidth VoIP payload can be reduced by 50% (40 bytes to 20 bytes) VoIP header can be reduced by 90-95% Uses RTP header compression (cRTP) (40 bytes to 2-4 bytes) Utilized on slower-speed links to make most of limited bandwidth
35
Link Efficiency: LFI
Link Fragmentation & Interleaving: Fragments large data packets & interleaves smaller data packets between the fragments Utilized on slower-speed links to make the most of limited bandwidth
36
Multipathing
Creates more than one physical path between the server & its storage devices for better fault tolerance & performance
37
Designing Redundant Networks
Examine technical/operational goals Identify the budget to fund high-availability features Categorize business apps into profiles Establish performance standards for high-availability solutions Define how to manage & measure the high-availability solutions (Time vs Cost vs Quality)
38
Recovery Sites: Cloud Site
Allows for the creation of a recovery version of an organization's enterprise network in the cloud
39
Recovery Sites: Cloud Site - RTO
Recovery Time Objective: Time & service level within which a business process must be restored after a disaster to avoid unacceptable consequences How much time did it take to recovery after the notification of a business process disruption? For low RTO situations: Use a hot or cold site
40
Recovery Sites: Cloud Site - RPO
Recovery Point Objective: Interval of time during a disruption before data lost exceeds the BCP's (business continuity plan) maximum allowable threshold or tolerance
41
Facilities Support: UPS
Uninterruptible Power Supply: Provides emergency power to a load when the input power source or main power fails Great for short duration power outages (less than 15 minutes)
42
Facilities Support: PDU
Power Distribution Unit: Distributes electric power, especially to racks of computers & networking equipment located within a data center PDUs combined with a UPS or generator can provide power during a blackout
43
Facilities Support: Generator
Provides long-term power during a power outage in a region Takes a while to start up Hot & cold aisle concept
44
Facilities Support: Wet Pipe System
Using a sprinkler system & pipes that always contain water
45
Facilities Support: Pre-Action System
A detector actuation like a smoke detector & a sprinkler must be tripped prior to water being released

CompTIA Network+ (N10-008) TMM (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions