Virtual points of connection for network services?

Virtual points of connection for network services?

• A. Basic network services
• B. Modem
• C. Ports
• D. 802.11n/ac/ax

Answer: (C)

Ports are the virtual endpoints that programs use to access network services. A host can run many services at once, each listening on a specific port. When data comes in, the transport layer uses the destination port to deliver the packet to the correct service, effectively multiplexing multiple services over a single IP address. For example, web services typically listen on port 80 (HTTP) or 443 (HTTPS), while other services use different port numbers. Other options don’t describe this mechanism: basic network services are broad functionalities, a modem is hardware that modulates/demodulates signals, and 802.11n/ac/ax refer to Wi‑Fi standards.

Ports are the virtual endpoints that programs use to access network services. A host can run many services at once, each listening on a specific port. When data comes in, the transport layer uses the destination port to deliver the packet to the correct service, effectively multiplexing multiple services over a single IP address. For example, web services typically listen on port 80 (HTTP) or 443 (HTTPS), while other services use different port numbers.

Other options don’t describe this mechanism: basic network services are broad functionalities, a modem is hardware that modulates/demodulates signals, and 802.11n/ac/ax refer to Wi‑Fi standards.