In today's world, data transmission speeds have become increasingly important. With the rise of online streaming, video conferencing, and cloud computing, it's essential to understand the difference between different transmission speeds. This article focuses on the physical differences between 10 Mbps, 100 Mbps, and 1000 Mbps (BASE-T) and the TCP handshake that occurs during data transmission.
Physical Differences between 10 Mbps, 100 Mbps, and 1000 Mbps (BASE-T)
When discussing transmission speeds, it's essential to consider the physical layer of the network, which is responsible for transmitting raw bits over a physical medium. The following subsections will discuss the physical differences between 10 Mbps, 100 Mbps, and 1000 Mbps (BASE-T).
10 Mbps and 100 Mbps
Both 10 Mbps and 100 Mbps use the same type of RJ-45 connector, but they don't utilize all eight pins. Only four pins are used for data transmission in both cases. This is because 10 Mbps and 100 Mbps use two pairs of wires, namely pins 1-2 and 3-6. The other two pairs of wires (pins 4-5 and 7-8) are not used.
1000 Mbps (BASE-T)
Unlike 10 Mbps and 100 Mbps, 1000 Mbps (BASE-T) uses all eight pins of the RJ-45 connector. This is because 1000 Mbps (BASE-T) uses all four pairs of wires for data transmission. This results in higher transmission speeds compared to 10 Mbps and 100 Mbps. Additionally, 1000 Mbps (BASE-T) uses advanced encoding techniques to increase the data transmission rate further.
TCP Handshake
During data transmission, a TCP (Transmission Control Protocol) handshake occurs between the client and server. This handshake ensures that a reliable, error-free connection is established before data transmission begins. The following subsections will discuss the TCP handshake in detail.
Three-Way Handshake
The TCP handshake consists of a three-way handshake. The client sends a SYN (synchronize) packet to the server, requesting a connection. The server then sends a SYN-ACK (synchronize-acknowledge) packet back to the client, indicating that it has received the request and is willing to establish a connection. Finally, the client sends an ACK (acknowledge) packet back to the server, confirming that it has received the server's response. Once this three-way handshake is complete, data transmission can begin.
Connection Establishment
During connection establishment, both the client and server agree on sequence numbers. These sequence numbers are used to ensure that data is transmitted in the correct order. Additionally, both the client and server agree on a window size, which determines the amount of data that can be transmitted before an acknowledgement is required. These parameters are crucial for ensuring a reliable and error-free connection.
References
- Ciscopress. (2010). Cisco CCNA Study Guide: Exam 640-802
- Tanenbaum, A.S. (2018). Computer Networks
- Wikipedia. (2023). Ethernet over Twisted Pair