Networking Flashcards

1
Q

What is an Amazon Virtual Private Cloud (Amazon VPC)

A

A networking service to establish boundaries around your resources

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2
Q

What is a Subnet

A

a section of a VPC that can contain resources
**Public or Private

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3
Q

How do you allow public traffic from the internet to access your VPC

A

attach an internet gateway to the VPC

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4
Q

What is a Virtual Private Gateway

A

Allows protected internet traffic to enter into the VPC.

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5
Q

What is AWS Direct Connect

A

a service that lets you to establish a dedicated private connection between your data center and a VPC

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6
Q

What are Public subnets

A

resources that need to be accessible by the public, such as an online store’s website.

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7
Q

What are Private subnets

A

resources that should be accessible only through your private network, such as a database that contains customers’ personal information and order histories.

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8
Q

What is a Packet

A

a unit of data sent over the internet or a network

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9
Q

What is a Network Access Control List

A

a virtual firewall that controls inbound and outbound traffic at the subnet level

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10
Q

By default, your account’s default network ACL allows

A

Allows all inbound and outbound traffic

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11
Q

For custom network ACLs, all inbound and outbound traffic is

A

denied until you add rules to specify which traffic to allow.

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12
Q

all network ACLs have an explicit rule to allow or deny traffic?

A

explicit deny rule. This rule ensures that if a packet doesn’t match any of the other rules on the list, the packet is denied.

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13
Q

Network ACLs perform what type of packet filtering

A

Stateless Packet Filterning

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14
Q

What is Stateless Packet Filtering

A

They remember nothing and check packets that cross the subnet border each way: inbound and outbound

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15
Q

What is a Security Group

A

a virtual firewall that controls inbound and outbound traffic for an Amazon EC2 instance.

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16
Q

By default, a Security Group denies and allows

A

-denies all inbound traffic
-allows all outbound traffic

17
Q

Security Groups perform what type of packet filtering

A

Stateful Packet Filtering

18
Q

What is Stateful Packet Filtering

A

They remember previous decisions made for incoming packets.

19
Q

What is Domain Name System (DNS) resolution

A

the process of translating a domain name to an IP address.

20
Q

What is Amazon Route 53

A

connects user requests to infrastructure running in AWS (such as Amazon EC2 instances and load balancers). It can route users to infrastructure outside of AWS.