3 Mbits, or 3 megabits, is a unit of digital information or data size that equals 3 million bits. It is commonly used to measure internet speeds and data transfer rates. For context, 1 megabit equals 1,000 kilobits, so 3 Mbits can also be expressed as 3,000 kilobits. In terms of bytes, 3 Mbits is equivalent to approximately 375 kilobytes (since there are 8 bits in a byte).
When multiple WAN ports are available, such as multiple internet connections, it helps evenly distribute requests and information through them. Example: You have a cable internet connection that gives you 3Mbits speed, and a dsl connection giving you 1.5Mbits speed, it would pull requested packets, or downloads from both connections, effectively giving you seamless 4.5Mbit connection speeds.
Common Internet Speed Services:1. Dial-up. 56kbits/s2. DSL. 512kbits/s - 3mbits/s3. Cable. 3mbits/s - 10mbits/s4. Fiber Optic. 5mbits/s - 30mbits/s*Speeds and services provided depend completely on specific ISP. Above are common ranges of speeds that many ISP's may offer today.