Section 4 Networking

Question 1

DNS Root Servers

Answer 1

Group of Servers that are authorized to give answers about root zone

Question 2

Top-Level-Domain (TLD)

Answer 2

Top tier of DNS hierarchy generally structured into geographical codes

Question 3

Subdimain

Answer 3

Anything between the host and a TLD

Question 4

Records - A

Answer 4

Host Name

Question 5

Records - MX

Answer 5

Mail eXchange

Question 6

Records - AAAA

Answer 6

IPv6 HOst Address

Question 7

Records - CNAME

Answer 7

Conical Name for an Alias

Question 8

Records - TXt

Answer 8

Descriptive Text

Question 9

Records - NS

Answer 9

Name Server

Question 10

Record - ALIAS

Answer 10

Auto Resolve Alias

Question 11

Record - PTR

Answer 11

Pointer

Question 12

Record - SOA

Answer 12

Start Of Authority

Question 13

Record - SRV

Answer 13

Location Server

Question 14

Proxy Server

Answer 14

Gateway that sits between a private and public network

Question 15

Seven-Layer OSI Model
Layer 1 (L1)

Answer 15

Physical

Question 16

Seven-Layer OSI Model
Layer 2 (L2)

Answer 16

Data Link

Question 17

Seven-Layer OSI Model
Layer 3 (L3)

Answer 17

Network

Question 18

Seven-Layer OSI Model
Layer 4 (L4)

Answer 18

Transport

Question 19

Seven-Layer OSI Model
Layer 5 (L5)

Answer 19

Session

Question 20

Seven-Layer OSI Model
Layer 6 (L6)

Answer 20

Presentation

Question 21

Seven-Layer OSI Model
Layer 7 (L7)

Answer 21

Application

Question 22

Subnetting

Answer 22

Breaking a network down into smaller subnetworks

Question 23

Virtual Private Cloud (VPC)

Answer 23

Private network within AWS

Question 24

VPC Routing

Answer 24

Virtual Routing device

Question 25

Router Table (RT)

Answer 25

Collection of Routes that are used when traffic from a subnet arrives at the VPC Router

Question 26

Bastion Host

Answer 26

Host that sits at the perimiter of a VPC as an entry point

Question 27

Network Address Translation (NAT)

Answer 27

Method of remapping a Source IPS or Destination IPs Packets

Question 28

Static Nat

Answer 28

Private IP is mapped to a public IP

Question 29

Dynamic NAT

Answer 29

Range of Private Addresses are mapped tonto one or more public IPs

Question 30

Network Access Control List (NACL)

Answer 30

Collection of Rules that can explicitly Allow or Deny taffic

Question 31

Network Access Control List (NACL) Allow or Deny traffic based on?

Answer 31

• Protocols
• Port Range
• Source / Destination IP

Question 32

Network Access Control List (NACL) have 2 sets of rules

Answer 32

• Inbound

- Outbound

Question 33

Which State are NACLs

Answer 33

Stateless

Question 34

VPC Peering

Answer 34

Direct communication between VPCs

Question 35

Can VPC Peering Span AWS Accounts & Regions?

Answer 35

Yes

Question 36

What Layer does VPC Peering work

Answer 36

Layer 3 Network

Question 37

VPC Endpoints

Answer 37

Used to connect public services without need an Internet Gateway

Question 38

VPC Endpoint Types

Answer 38

• Gateway Endpoints

- Interface Endpoints

Question 39

Gateway Endpoints

Answer 39

Used for DynamicDB & S3

Question 40

Interface Endpoints

Answer 40

Used for everything except DynamicDB & S3

Question 41

Egress-Only Internet Gateway

Answer 41

Provides IPv6 with access to Public Internet

Question 42

Simple Routing Policy

Answer 42

Single Record within hosted zone that contains 1 or more values

Question 43

Simple Routing Policy returns all values in what order?

Answer 43

Randomized

Question 44

Failover Routng Policy

Answer 44

Creates 2 records with the same name. A Primary and Secondary

Question 45

Weighted Routing Policy

Answer 45

Used to control the amount of traffic to a specific resource

Question 46

Latency Routing Policy

Answer 46

Routes traffic to the lowest latency

Question 47

Geolocation Routing Policy

Answer 47

Routes traffic based on the Geographical Region that a query originates