Correct answer is (D):
"TFTP is a UDP-based protocol. Servers listen on port 69 for the initial client-to-server packet to establish the TFTP session, then use a port above 1023 for all further packets during that session. Clients use ports above 1023"
https://docstore.mik.ua/orelly/networking_2ndEd/fire/ch17_02.htm
Besides, Google Cloud external TCP/UDP Network Load Balancing (after this referred to as Network Load Balancing) is a regional, non-proxied load balancer.
Network Load Balancing distributes traffic among virtual machine (VM) instances in the same region in a Virtual Private Cloud (VPC) network. A network load balancer directs TCP or UDP traffic across regional backends.
The correct answer is D.
Explanation: A Network Load Balancer is ideal for scenarios like TFTP (Trivial File Transfer Protocol) where you need to load balance non-HTTP(S) traffic. It works at the TCP/UDP layer and is suitable for handling high-throughput, low-latency traffic like TFTP, which doesn’t involve SSL or HTTP-specific protocols.
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TCP proxy load balancers: TCP proxy load balancers can be used to load balance TFTP traffic that is encapsulated in TCP. This can be useful if you need to provide additional security for your TFTP traffic.
Network load balancers: Network load balancers can be used to load balance TFTP traffic that is not exposed to the internet. This can be useful if you need to load balance TFTP traffic between multiple private networks.
D: Balancing) is a regional, non-proxied load balancer. Network Load Balancing distributes traffic among virtual machine (VM) instances in the same region in a Virtual Private Cloud (VPC) network. A network load balancer directs TCP or UDP traffic across regional backends.
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