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ANS-C00 PDF DEMO:
QUESTION NO: 1
You manage a website that uses a load balancer. You are noticing one of the servers is receiving more traffic than the other. What is probably the cause of this? Choose the correct answer:
A. An Elastic Load Balancer sends traffic based on server load. One server must be a larger instance.
B. The server has more connections available.
C. You have DNS latency routing set, so it is diverting traffic to a different instance.
D. You have sticky sessions configured and there are several power users that happen to be on the other server.
Answer: D
Explanation:
Sticky sessions can keep users on a particular server throughout their session. Latency routing would route to the load balancer, not the instances. Load balancers use a round-robin algorithm to balance.
QUESTION NO: 2
Your website is under attack and a malicious party is stealing large amounts of data.
You have default NACL rules. Stopping the attack is the ONLY priority in this case.
Which two commands should you use?
Choose the 2 correct answers:
A. aws ec2 delete-network-acl-entry -network-acl-id acl-5fb84d47 -egress rule-number 100
B. aws ec2 delete-network-acl-entry -network-acl-id acl-5fb84d47 -ingress -rule-number 32768
C. aws ec2 create-network-acl-entry -network-acl-id acl-5fb84d47 -ingress rule-number 100 -protocol
-1 -port-range From=-1,To=-1 -cidr-block 0.0.0.0/0 -rule-action deny
D. aws ec2 delete-network-acl-entry -network-acl-id acl-5fb84d47 -ingress rule-number 100
Answer: A,D
Explanation:
You should remove the default allow rules in your NACL and a default deny will be the only rule left for inbound and outbound. If you attempt to create a rule number 100, it will encounter an error as there is already a rule 100.
QUESTION NO: 3
You are configuring a VPN to AWS for your company. You have configured the VGW and
CGW.
You have created the VPN. You have also run the necessary commands on your router. You allowed all TCP and UDP traffic between your datacenter and your VPC. The tunnel still doesn't come up.
What is the most likely reason?
Choose the correct answer:
A. Your advertised subnet is too large.
B. You haven't added protocol 50 to your firewall.
C. You forgot to turn on route propagation in the route table.
D. You do not have a public ASN.
Answer: B
Explanation:
You haven't allowed protocol 50 through the firewall. Protocol 50 is different from UDP (17) and TCP
(6) and requires a rule in your firewall for your VPN tunnel to come up.
QUESTION NO: 4
You need to create a baseline of normal traffic flow in order to implement some security changes to your organization.
What two items would be best to use? Choose the 2 correct answers:
A. Wireshark
B. CloudTrail
C. An IDS
D. CloudWatch
Answer: A,D
QUESTION NO: 5
A network engineer deploys an application in a private subnet in a VPC that connects to many external video feed providers using RTMP over the internet. A NAT gateway has been deployed in a public subnet and is working as expected. From the Amazon EC2 instance, the application is able to connect to all feed providers except one, which hangs when connecting. Manually testing a connection from an Amazon EC2 instance in the public subnet to the problem feed indicates that the feed works as expected.
What is causing this issue?
A. An Amazon EC2 instance expects to communicate with an MTU of 9001.
B. The internet gateway only supports an MTU of 1500 bytes.
C. The security group on the instances does not allow PMTU
D. The NAT gateway does not support fragmented packets.
Answer: C
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Updated: May 28, 2022