Network Design

Question 1

Types of instances that support Enhanced Networking

Answer 1

C3,C4,D2,I2,M4,R3 (excluding m4.16xlarge)

Question 2

Device that shows up for Enhanced Networking

Answer 2

ixgbevf

Question 3

Requirements for Enhanced Networking and features

Answer 3

certain instance types, kernels greater than 2.6.32, jumbo frames supported and uses SR-IOV, must be HVM not DV vm’s

Question 4

T/F. You can connect all 4 regions to a single Direct Connect in one regions

Answer 4

True

Question 5

ENA’s Instances and device

Answer 5

C5, F1, G3, P2, P3, R4, X1 + m4.16xlarge shows up as ena device

Question 6

Required kernel for ENA adapters and speed

Answer 6

Greater than 3.2 and speeds up to 25Gb/s

Question 7

ELB Classic supports what ports for EC2 classic

Answer 7

25,80,443,465,587,1024-65535

Question 8

ELB Classic supports what ports for EC2 VPC

Answer 8

1-65535

Question 9

How can you obtain faster speeds than the 10Gb that managed NAT instances provide

Answer 9

You can still used instance based which can be scaled out or up, for example one per AZ and increase instance sizing. Instance based can also be used as bastion hosts

Question 10

What addresses are reserved on a subnet and what are the uses?

Answer 10

.0 - network id
.1 - GW
.2 - DNS
.3 - Reserved
.255 - Broadcast not supported in AWS but reserved

Question 11

What is the difference between CGW and VPG

Answer 11

Customer GW is on-premise and VPG (Virtual Private GW) is in AWS

Question 12

What are CGW and VPG used for

Answer 12

They are the two anchor points on a VPN connection think IPSEC

Question 13

T/F. You can assign EIPs to ELBs

Answer 13

False

Question 14

T/F. Placement groups can span difference subnets

Answer 14

True as long as they are in the same VPC and not in different AZs