TCP/UDP

Correct Answer: HTTP and HTTPS

The correct combination of protocols for handling both insecure and secure connections on a web server is HTTP and HTTPS. HTTP (HyperText Transfer Protocol) is used for insecure, plain text connections, while HTTPS (HTTP Secure) is used for secure, encrypted connections. The other answers are incorrect because they refer to different types of protocols that are not specifically used for insecure and secure web server connections. TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are transport layer protocols that provide the delivery of a packet of data from source to target. Although TLS is used for secure connections, it is generally used along with HTTP not TCP or UDP. ICMP (Internet Control Message Protocol) and IPSec (Internet Protocol Security) are not used for web server connections. ICMP is a supporting protocol that sends error messages and operational information, while IPSec is a suite of protocols for securing internet protocol (IP) communications.

Correct Answer: IGMP

The correct protocol to use to filter and control Spanning Tree Protocol (STP) control packets is Internet Group Management Protocol (IGMP). IGMP can manage the flooding of multicast transmissions, and control the flow of STP packets to ensure bandwidth is not consumed excessively. On the other hand, TCP (Transmission Control Protocol) is not the correct answer because it is a transport layer protocol designed for establishing reliable connections and transmitting data, not specifically for filtering STP control packets. UDP (User Datagram Protocol) is also not the correct answer because it is a connectionless transport protocol, and doesn't filter or control network traffic. Finally, ICMP (Internet Control Message Protocol) is also not correct, as it is used for diagnosing network issues, not for controlling STP packets or managing network traffic.

Correct Answer: TCP

The best protocol for ensuring reliable and ordered data transfer is the Transmission Control Protocol (TCP). TCP uses a system of acknowledgements and retransmissions to ensure that all data packets have been received correctly and in the proper order. Unlike User Datagram Protocol (UDP), which does not provide such reliability mechanisms. Internet Protocol (IP) is also not the correct answer as it's a network protocol responsible for routing packets of data from the source of the data to the destination, but not for the reliability of that delivery. Internet Control Message Protocol (ICMP) is primarily used for error and diagnostic purposes and does not ensure reliable and ordered data transfer.