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CompTia Network+ > Network Implementations - Objective 2 > Flashcards

Network Implementations - Objective 2 Flashcards

Networking devices, routing, Ethernet switching, wireless

1
Q

802.3ad

A

Link Aggregation

Combines multiple physical connections into a single logical one to minimize congestion

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2
Q

802.3af max wattage

A

15.4 watts

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3
Q

802.3at max wattage

A

25.5 watts

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4
Q

802.1d

A

Spanning tree protocol

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5
Q

802.1q

A

VLAN trunking

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6
Q

How do IPSs & IDSs recognize attacks?

A

Through signatures & anomalies

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7
Q

Content Engine/Caching Engine

A

Dedicated appliance that performs the caching functions of a proxy server

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8
Q

Where is a Content Engine/Caching Engine highly beneficial?

A

A remote branch office with a slow WAN link

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9
Q

What is a content switch also known as?

A

A load balancer

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10
Q

ICS

A

Industrial Control System

Describes the different types of control systems & associated instrumentation

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11
Q

SCADA

A

Supervisory control, and data acquisition

Acquires and transmits data from different systems to central panel for monitoring and control

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12
Q

The 2 routing loop prevention methods

A
  • Split horizon
  • Poison reverse
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13
Q

Number of non-overlapping 20 MHz channels in the 5 GHz band

A

24 channels

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14
Q

Two protocols associated with WPA

A

TKIP & RC4

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15
Q

Two protocols associated with WPA2

A

CCMP & AES

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16
Q

Geofencing

A

Uses GPS or RFID to define real-world boundaries where barriers can be active or passive

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17
Q

How to crack WEP

A

Capture enough initialization vectors (IV)

[using something like Aircrack-ng]

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18
Q

Type of vector used by WPA

A

TKIP

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19
Q

CSMA/CA is used in what kind of network?

A

Wireless network

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20
Q

CSMA/CD is used in what kind of network?

A

Wired network

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21
Q

Type of encryption used by WPA

A

RC4 (Rivest Cipher 4)

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22
Q

WPA2 integrity checking protocol

A

CCMP
(Counter mode cipher block chaining message authentication code protocol)

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23
Q

WPA2 encryption protocol

A

AES
(Advanced Encryption Security)

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24
Q

HSRP

A

Hot Standby Router Protocol

Proprietary first-hop redundancy by Cisco allowing for an active and a standby router and using a virtual router as a default gateway

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25
Q

VRRP

A

Virtual Router Redundancy Protocol

IETP open-standard variant of HSRP, and like HSRP, allows for an active and a standby router and uses a virtual router as a default gateway

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26
Q

GLBP (4 bullet points)

A

Gateway Load Balancing Protocol

  • Proprietary first-hop redundancy by Cisco
  • Focuses on load balancing over redundancy
  • Allows for an active router and a standby router
  • Creates a virtual router as the default gateway
27
Q

LACP (3 bullet points)

A

Link Aggregation Control Protocol

  • Achieves redundancy by having multiple links
    between devices
  • Load balancing occurs over multiple links
  • Multiple links appear as single logical link
28
Q

Multipathing

A

Creates more than one physical path between the server and its storage devices for better fault tolerance and performance

29
Q

Which means of achieving high availability is cheaper in the long run…
- retrofitting an existing network
or
- integrating practices/technology into the initial design?

A

integrating practices/technology into the initial design

30
Q

Cold site

A

An available building that does not have any hardware or software. Might have empty racks.

31
Q

Warm Site - what is there & restoration time frame

A
  • a lot of the equipment
  • no software/data
  • between 24 hours and seven days
32
Q

Hot Site - what is there & restoration time frame

A
  • equipment and data in place, configured, & updated
  • minimal
33
Q

RTO

A

Recovery Time Objective

Time and service level within which a business process must be restored after a disaster to avoid unacceptable consequences

34
Q

What kind of recovery site should be used in low RTO situations?

A

either hot or cloud

35
Q

RPO

A

Recovery Point Objective

Interval of time during a disruption before data lost exceeds the BCP’s maximum allowable threshold or tolerance

36
Q

Incremental backup

A

Backup only data changed since last backup

37
Q

Differential

A

Only backup data since the last full backup

38
Q

PDU

A

Power Distribution Unit

Distributes electric power, especially to racks of computers and
networking equipment located within a data center

39
Q

Pre-Action System

A

A fire suppression system in which a detector actuation (like a smoke detector and a sprinkler) must be tripped prior to water being released

40
Q

3 ways of categorizing QoS traffic

A
  • Best Effort
  • Integrated Services (IntServ or Hard QoS)
    bandwidth reservations
  • Differentiated Services (DiffServ or Soft QoS)
    *packets are “marked” for routers/switches
    to make routing decisions
41
Q

Potential payload & header reduction of VoIP traffic using compression, including cRTP

A

50% & 90-95%

42
Q

LFI
What it is & where it’s used

A

Link Fragmentation & Interleaving

  • Fragments large data packets and interleaves smaller data packets between the fragments (so latency-sensitive traffic doesn’t have to wait for large packets)
  • slower-speed links to make the most of limited bandwidth
43
Q

3 things APs must have to enable roaming between them

A
  • The same SSID
  • The same channel
  • The same IP subnet
44
Q

DOCSIS

A

The standard that determines the frequencies used in cable modem networking

45
Q

Version of OSPF that supports IPv6

A

OSPFv3

46
Q

OSPF methods of learning about other routers in the network

A

Hello packets & link state advertisements

47
Q

Route redistribution

A

When a multiprotocol router learns route information using one routing protocol and disseminates that information using another routing protocol

48
Q

Voice Gateway

A

A.k.a. VoIP gateway
Converts data, providing a bridge between analogue, cellular, and IP

49
Q

IPv4 method of preventing endless routing loops

A

TTL

50
Q

IPv6 method of preventing endless routing loops

A

hop limit

51
Q

IPv4 & IPv6 addresses for the default route

A

0.0.0.0/0 & ::/0

52
Q

5 Functions of a load balancer

A
  • Load balancing
  • Caching
  • Encryption and decryption a.k.a SSL offloading
  • QoS
  • Content filtering
53
Q

Locations of VPN concentrators

A
  • Specialized hardware
  • Integrated into a firewall
  • Integrated into a server
54
Q

OSI layer at which proxy servers operate

A

Layer 7

55
Q

Reverse proxy

A

Takes requests from the Internet and forwards them to servers in an internal network

56
Q

Why proxies make good firewalls

A

They can dissect an entire IP packet looking for invalid data at each layer of the OSI model.

57
Q

Next generation firewalls are also known as:

A

Layer 7 or Application layer firewalls

58
Q

The two types of network layer firewalls

A

stateful and stateless

59
Q

Things a firewall can do

A
  • Permit/deny packets
  • Encryption/decryption
  • Proxying
60
Q

3 types of load balancer configurations in an active/active setup

A
  • Round robin (each server in turn)
  • Weighted round robin (in turn but most goes to one server)
  • Dynamic round robin (server with the smallest load is next in line)
61
Q

CDMA

A

Code division multiple access
Early cellular telephone technology that uses spread-spectrum to allow several users to share a band of frequencies

62
Q

VTP

A

Layer 2 messaging protocol that maintains VLAN configuration consistency by managing the addition, deletion, and renaming of VLANs on a network-wide basis

63
Q

Whip antenna

A

A pole-shaped omnidirectional antenna

CompTia Network+ (5 decks)

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