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AWS SAA-C02 > ELB > Flashcards

ELB Flashcards

1
Q

ELB

A

Elastic Load Balancing
server that forwards traffic to multiple targets

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2
Q

Services integrated (3)

ELB

A

EC2
ECS
Lambda

ELB

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3
Q

Regional high availability

ELB

A

Supports using multiple AZs in a region

ELB

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4
Q

Horizontal scaling

ELB

A

Add EC2 instances to cover additional demand

ELB

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5
Q

availability purpose

ELB

A

spread load across multiple instances

ELB

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6
Q

public purpose

ELB

A

provide single point of access (e.g. one DNS entry)

ELB

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7
Q

availability purpose

ELB

A

seamlessly handle instance failures

ELB

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8
Q

target monitoring purpose

ELB

A

does health checks on instances

ELB

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9
Q

SSL purpose

ELB

A

provide SSL termination point

ELB

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10
Q

regional availability purpose

ELB

A

availability provided across multipl AZ

ELB

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11
Q

security purpose

ELB

A

separate public traffic from private traffic

ELB

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12
Q

maintenance benefit

ELB

A

managed and maintained by AWS

ELB

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13
Q

pricing benefit

ELB

A

costs less than 3rd party LBs

ELB

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14
Q

set up benefit

ELB

A

low effort needed to set up

ELB

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15
Q

Health check

ELB

A

allows ELB to know which instances can receive traffic

ELB

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16
Q

how instances are monitored

Health Check

A

a port and route is frequently checked

Health Check

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17
Q

healthy response

Health Check

A

200 (OK)

Health Check

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18
Q

ELB

LB security (2)

A
  • Open specific ports from Internet to LB
  • Restrict instances to only LB
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19
Q

sticky sessions

ELB

A

client is directed to same instance during time

ELB

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20
Q

use case

sticky sessions

A

ensure that client doesn’t lose session data

sticky sessions

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21
Q

draw back

sticky sessions

A

may case load imbalances

sticky sessions

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22
Q

types of cookies (s)

sticky sessions

A
  • application
  • duration

sticky sessions

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23
Q

Application-based cookie (2)

sticky session cookies

A
  • assigned by LB
  • named AWSALBAPP

sticky session cookies

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24
Q

custom cookie

sticky session cookies

A

specified for individual target group

sticky session cookies

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25
Q

duration-based cookie (2)

sticky session cookies

A
  • generated by load balancer
  • name is AWSALB

sticky session cookies

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26
Q

cross-zone load balancing

ELB

A

ELB in one zone can LB to targets in multiple AZs

ELB

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27
Q

default setting for ALB

cross-zone load balancing

A

enabled

cross-zone load balancing

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28
Q

default setting for NLB and GWLB

cross-zone load balancing

A

disabled

cross-zone load balancing

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29
Q

SSL cert purpose

ELB

A

attached to LB to encrypt public traffic

ELB

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30
Q

cert sources (2)

ELB SSL

A
  • ACM (AWS Certificate Manager)
  • upload cert you own

ELB SSL

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31
Q

HTTPS listener requirement

ELB SSL

A

default certificate

ELB SSL

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32
Q

HTTPS listener may have these

ELB SSL

A

multiple certs for securing multiple domains

ELB SSL

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33
Q

HTTPS listener security policy option

ELB SSL

A

may enable support for older versions of SSL/TSL

ELB SSL

34
Q

SNI

ELB SSL

A

Server Name Indication
allows one web server to load multiple certs

ELB SSL

35
Q

SNI requirement

SNI

A

requires client to indicate target domain name in SSL handshake

SNI

36
Q

SNI response

SNI

A

use correct cert for domain

SNI

37
Q

deregistration delay

ELB

A

gives “in-flight” requests time to complete while instance is deregistereed

ELB

38
Q

what ALB and NLB do when deregistering instance

deregistration delay

A

send all new requests to other instances

deregistration delay

39
Q

time option

deregistration delay

A

0 (disabled) to 3600 seconds

deregistration delay

40
Q

time default

deregistration delay

A

300

deregistration delay

41
Q

Elastic Load Balancing
server that forwards traffic to multiple targets

A

ELB

42
Q

EC2
ECS
Lambda

ELB

A

Services integrated (3)

ELB

43
Q

Supports using multiple AZs in a region

ELB

A

Regional high availability

ELB

44
Q

Add EC2 instances to cover additional demand

ELB

A

Horizontal scaling

ELB

45
Q

spread load across multiple instances

ELB

A

availability purpose

ELB

46
Q

provide single point of access (e.g. one DNS entry)

ELB

A

public purpose

ELB

47
Q

seamlessly handle instance failures

ELB

A

availability purpose

ELB

48
Q

does health checks on instances

ELB

A

target monitoring purpose

ELB

49
Q

provide SSL termination point

ELB

A

SSL purpose

ELB

50
Q

availability provided across multipl AZ

ELB

A

regional availability purpose

ELB

51
Q

separate public traffic from private traffic

ELB

A

security purpose

ELB

52
Q

managed and maintained by AWS

ELB

A

maintenance benefit

ELB

53
Q

costs less than 3rd party LBs

ELB

A

pricing benefit

ELB

54
Q

low effort needed to set up

ELB

A

set up benefit

ELB

55
Q

allows ELB to know which instances can receive traffic

ELB

A

Health check

ELB

56
Q

a port and route is frequently checked

Health Check

A

how instances are monitored

Health Check

57
Q

200 (OK)

Health Check

A

healthy response

Health Check

58
Q
  • Open specific ports from Internet to LB
  • Restrict instances to only LB
A

ELB

LB security (2)

59
Q

client is directed to same instance during time

ELB

A

sticky sessions

ELB

60
Q

ensure that client doesn’t lose session data

sticky sessions

A

use case

sticky sessions

61
Q

may case load imbalances

sticky sessions

A

draw back

sticky sessions

62
Q
  • application
  • duration

sticky sessions

A

types of cookies (#)

sticky sessions

63
Q
  • assigned by LB
  • named AWSALBAPP

sticky session cookies

A

Application-based cookie (2)

sticky session cookies

64
Q

specified for individual target group

sticky session cookies

A

custom cookie

sticky session cookies

65
Q
  • generated by load balancer
  • name is AWSALB

sticky session cookies

A

duration-based cookie (2)

sticky session cookies

66
Q

ELB in one zone can LB to targets in multiple AZs

ELB

A

cross-zone load balancing

ELB

67
Q

enabled

cross-zone load balancing

A

default setting for ALB

cross-zone load balancing

68
Q

disabled

cross-zone load balancing

A

default setting for NLB and GWLB

cross-zone load balancing

69
Q

attached to LB to encrypt public traffic

ELB

A

SSL cert location

ELB

70
Q
  • ACM (AWS Certificate Manager)
  • upload cert you own

ELB SSL

A

cert sources (2)

ELB SSL

71
Q

default certificate

ELB SSL

A

HTTPS listener requirement

ELB SSL

72
Q

list of certs for securing multiple domains

ELB SSL

A

HTTPS listener option

ELB SSL

73
Q

may enable support for older versions of SSL/TSL

ELB SSL

A

HTTPS listener security policy option

ELB SSL

74
Q

Server Name Indication
allows one web server to load multiple certs

ELB SSL

A

SNI

ELB SSL

75
Q

requires client to indicate target domain name in SSL handshake

SNI

A

SNI requirement

SNI

76
Q

use correct cert for domain

SNI

A

SNI response

SNI

77
Q

gives “in-flight” requests time to complete while instance is deregistereed

ELB

A

deregistration delay

ELB

78
Q

send all new requests to other instances

deregistration delay

A

what ALB and NLB do when deregistering instance

deregistration delay

79
Q

0 (disabled) to 3600 seconds

deregistration delay

A

time option

deregistration delay

80
Q

300

deregistration delay

A

time default

deregistration delay

AWS SAA-C02 (42 decks)

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