Monitoring and Troubleshooting

Question 1

VPC reachability Analyzer

Answer 1

aids in troubleshooting network issues by verifying connectivity using automated reasoning. All resource configurations (security groups, routes, firewalls, and so on) that can affect the connectivity of your network are inspected to determine if the network flow is possible.

Question 2

Reachability Analyzer Use Cases

Answer 2

Blocked Path
Two Endpoints
Traffic through Transit Gateway

Question 3

How to resolve after using Reachability analyzer

Answer 3

Cloudwatch logs, lamda functoin

Question 4

steps to create a cloudwatch alarm

Answer 4

1. metric to monitor
2. evaluation period
3. when to initiate alarm
4. metric alarm state
5. datapoint to alarm

Question 5

Cloudwatch Agent

Answer 5

imports network performance metrics for Amazon EC2 instances running on Linux using the Elastic Network Adapter (ENA) to publish network performance metrics to CloudWatch.

Question 6

namespace for a peering connection

Answer 6

pcx

Question 7

traffic that cannot be mirrored in aws

Answer 7

ARP
DHCP
Instance metadata service
NTP
Windows activation