10-1

Chapter 10

Viewing TCP Group Information

The TCP Group window

The Transmission Control Protocol (TCP) is often called reliable stream transport
service because it is based on a connection between two nodes. Like IP, TCP’s
purpose is to transfer data between applications. TCP segments, the basic unit of
data transfer within TCP, are carried within IP datagrams; usually, each TCP
segment travels across the internet within a single IP datagram. Unlike IP, TCP
ensures that the data arrives at its destination. If a delivery problem occurs, the
sending application receives notification and can take appropriate action. This
reliability is possible because TCP creates a two-way communication stream
between the sending and receiving station. The connection is full-duplex—data
flows both directions simultaneously.
To open the TCP Group window:
1. Click the Other Groups button. The Other Groups drop-down menu displays.
2. Click TCP Group. The TCP Group window, Figure10-1, opens.