In networking, when a network interface card (NIC) is labeled as 10/100, what does this specification indicate about its data rates?

Introduction / Context:
NIC specifications often include numeric pairs like 10/100 or 10/100/1000. Understanding these numbers helps identify supported Ethernet data rates and match cabling, switches, and performance expectations in small office/home and enterprise networks.

Given Data / Assumptions:

• 10/100 refers to legacy Fast Ethernet compatibility.
• Media is typically copper twisted pair with RJ-45 connectors.
• Full- or half-duplex operation may apply depending on configuration and switch support.

Concept / Approach:
Ethernet data rates are expressed in megabits per second (Mb/s). A 10/100 NIC supports 10 Mb/s (10BASE-T) and 100 Mb/s (100BASE-TX). Auto-negotiation selects the highest mutually supported rate and duplex between NIC and switch. The notation does not refer to protocol versions, fiber classification, or server speed; it is strictly the line-rate capability of the NIC.

Step-by-Step Solution:

Verification / Alternative check:
Checking NIC properties in the operating system or switch interface will show the negotiated link speed as 10 Mb/s or 100 Mb/s, validating the meaning of the label.

Why Other Options Are Wrong:

• Protocol speed: Vague and misleading; Ethernet speed is link data rate, not a separate protocol metric.
• A fiber speed: 10/100 commonly refers to copper Ethernet; fiber uses other designations.
• Minimum and maximum server speed: Server performance is unrelated to NIC link-rate labeling.
• None of the above: Incorrect because 10/100 clearly denotes megabits per second.

Common Pitfalls:
Confusing Mb/s (megabits per second) with MB/s (megabytes per second), and assuming cable quality is irrelevant to achieving 100 Mb/s.

Final Answer:
Megabits per second