A SysOps administrator needs to register targets for a Network Load Balancer (NLB) using IP addresses. Which prerequisite should the SysOps administrator validate to perform this task?
A.
Ensure the NLB listener security policy is set to ELBSecurityPolicy-TLS-1-2-Ext-2018-06, ELBSecurityPolicy-FS-1-2-Res-2019-08, or ELBSecurityPolicy-TLS- 1-0-2015-04.
B.
Ensure the health check setting on the NLB for the Matcher configuration is between 200 and 399.
C.
Ensure the targets are within any of these CIDR blocks: 10.0.0.0/8 (RFC 1918), 100.64.0.0/10 (RFC 6598), 172.16.0.0/12 (RFC 1918), or 192.168.0.0/16 (RFC 1918).
D.
Ensure the NLB is exposed as an endpoint service before registering the targets using IP addresses.
When registering targets for a Network Load Balancer (NLB) using IP addresses, the targets must be within any of the specified private CIDR blocks: 10.0.0.0/8, 100.64.0.0/10, 172.16.0.0/12, or 192.168.0.0/16. These are private IP address ranges as defined by RFC 1918, which are reserved for use within private networks and not routed over the public internet.
Answer is C.
An IP address that you register must be from one of the following CIDR blocks:
The subnets of the VPC for the target group
10.0.0.0/8 (RFC 1918)
100.64.0.0/10 (RFC 6598)
172.16.0.0/12 (RFC 1918)
192.168.0.0/16 (RFC 1918)
The IP address type cannot be changed after the target group is created.
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