- TCP control messages:
- TCP control messages are
transmitting by:
- Setting some of the FLAG bits in the TCP header
- TCP control messages are
transmitting by:
- Recall the
TCP header (packet format):
- Meaning
of the flags used
during a
TCP connection
establishment:
- SYN flag bit:
- tell the receiving TCP module to synchronize its ACK number (receive sequence number) to the value in SeqNo field of the TCP header
- ACK flag bit:
- ACK = 1: the ACK no. value in TCP header is valid
- ACK = 0: the ACK no. value in TCP header is invalid
- RST flag bit:
- Purge all information on this TCP connection
- SYN flag bit:
- Fact:
- The names given to
the processes that
establishes a
TCP connection
comes historically from:
- the client/server computation model
- The names given to
the processes that
establishes a
TCP connection
comes historically from:
- The client/server
computation model:
- A server provides
a computation service
- A client can
request the
service from a
server
- Interaction model:
- A server will
wait for
requests from
clients
- A server will
wait for
requests from
clients
- A server provides
a computation service
- TCP terminology:
- Client =
the initiator of a
TCP connection request
- Server = the receiver of a TCP connection request
- Client =
the initiator of a
TCP connection request